ORCID Profile
0000-0003-2298-6539
Current Organisation
Queensland University of Technology
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Nanoscale Characterisation | Nanomaterials | Chemical Characterisation of Materials | Nanotechnology | Materials Engineering | Composite and Hybrid Materials | Condensed Matter Characterisation Technique Development | Condensed matter modelling and density functional theory | Materials engineering | Optical Properties of Materials | Chemical Engineering Design | Macromolecular and Materials Chemistry | Synthesis of Materials | Interdisciplinary Engineering not elsewhere classified | Photodetectors, Optical Sensors and Solar Cells | Crop and Pasture Production | Electrical and Electronic Engineering | Nanoelectronics | Functional materials | Functional Materials | Energy Generation, Conversion and Storage Engineering | Crop and Pasture Biomass and Bioproducts | Electronic and Magnetic Properties of Condensed Matter; Superconductivity
ANZSRC Socio-Economic Objective (SEO)
Scientific Instruments | Expanding Knowledge in Engineering | Inorganic Industrial Chemicals | Environmentally Sustainable Manufacturing not elsewhere classified | Expanding Knowledge in Technology | Management of Solid Waste from Plant Production | Energy Storage (excl. Hydrogen) | Solar-Photovoltaic Energy | Basic Iron and Steel Products | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Structural Metal Products |
Related Links
Publications
Fouling of a microfiltration membrane by two Gram-negative bacteria
Publisher: Elsevier BV
Date: 06-1993
Nano boron nitride flatland
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CS60260E
Abstract: Recent years have witnessed many breakthroughs in research on two-dimensional (2D) nanomaterials, among which is hexagonal boron nitride (h-BN), a layered material with a regular network of BN hexagons. This review provides an insight into the marvellous nano BN flatland, beginning with a concise introduction to BN and its low-dimensional nanostructures, followed by an overview of the past and current state of research on 2D BN nanostructures. A comprehensive review of the structural characteristics and synthetic routes of BN monolayers, multilayers, nanomeshes, nanowaves, nanoflakes, nanosheets and nanoribbons is presented. In addition, electronic, optical, thermal, mechanical, magnetic, piezoelectric, catalytic, ecological, biological and wetting properties, applications and research perspectives for these novel 2D nanomaterials are discussed.
Formation of Crystalline SrAl2O4 Nanotubes by a Roll‐Up and Post‐Annealing Approach
Publisher: Wiley
Date: 20-07-2006
In-doped Ga2O3 nanobelt based photodetector with high sensitivity and wide-range photoresponse
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM33189F
Bulk synthesis, growth mechanism and properties of highly pure ultrafine boron nitride nanotubes with diameters of sub-10 nm
Publisher: IOP Publishing
Date: 24-02-2011
DOI: 10.1088/0957-4484/22/14/145602
Abstract: As a structural analogue of the carbon nanotube (CNT), the boron nitride nanotube (BNNT) has become one of the most intriguing non-carbon nanostructures. However, up to now the pre-existing restrictions/limitations of BNNT syntheses have made the progress in their research rather modest. This work presents a new route toward the synthesis of highly pure ultrafine BNNTs based on a modified boron oxide (BO) CVD method. A new effective precursor--a mixture of Li₂O and B--has been proposed for the growth of thin, few-layer BNNTs in bulk amounts. The Li₂O utilized as the precursor plays the crucial role for the present nanotube growth. The prepared BNNTs have average external diameters of sub-10 nm and lengths of up to tens of µm. Electron energy loss spectrometry and Raman spectroscopy demonstrate the ultimate phase purity of the ultrafine BNNTs. Property studies indicate that the ultrafine nanotubes are perfect electrical insulators exhibiting superb resistance to oxidation and strong UV emission. Moreover, their reduced diameters lead to a dramatically decreased population of defects within the tube walls and result in the observation of near-band-edge (NBE) emission at room temperature.
Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties
Publisher: Wiley
Date: 11-01-2005
Synthesis, Analysis, and Electrical Property Measurements of Compound Nanotubes in the B-C-N Ceramic System
Publisher: Springer Science and Business Media LLC
Date: 2004
DOI: 10.1557/MRS2004.15
Abstract: Nanotubular structures in the B-C-N ceramic system represent an intriguing alternative to conventional carbon nanotubes.Because of the ability to widely vary the chemical composition of nanotubes within the B-C-N ternary phase diagram and to change the stacking of C-rich or BN-rich tubular shells in multiwalled structures, a wide horizon opens up for tuning nanostructure electrical properties.Pure carbon nanotubes are metals or narrow-bandgap semiconductors, depending on the helicity and diameter, whereas those of BN are insulators with a ∼5.0eV gap independent of these parameters.Thus, the relative B/C/N ratios and/or BN-rich and C-rich domain spatial arrangements, rather than tube helicity and diameter, are assumed to primarily determine the B-C-N nanotube electrical response.This characteristic is highly valuable for nanotechnology:while tube diameter and helicity are currently difficult to control, continuous doping of C with BN, or vice versa, proceeds relatively easily due to the isostructural nature of layered C and BN materials.In this article, recent progress in the synthesis, microscopic analysis, and electrical property measurements of a variety of compound nanotubes in the ceramic B-C-N system is documented and discussed.
Sn‐Catalyzed Thermal Evaporation Synthesis of Tetrapod‐Branched ZnSe Nanorod Architectures
Publisher: Wiley
Date: 03-11-2004
Structure and cathodoluminescence of hierarchical Zn3P2∕ZnS nanotube/nanowire heterostructures
Publisher: AIP Publishing
Date: 12-02-2007
DOI: 10.1063/1.2539821
Abstract: The authors reported on the structural analysis of hierarchical Zn3P2∕ZnS nanotube/nanowire heterostructures, which were synthesized by a one-step thermochemical process. The structural analyses by several techniques show that the stem and the branches in the heterostructures have the epitaxial relations as [010]Zn3P2‖[12¯10]ZnS and (101)Zn3P2‖(0002)ZnS. Cathodoluminescence of the heterostructures was also investigated, which shows strong green emissions centered at approximately 510 and 600nm.
Nanowires sheathed inside nanotubes: Manipulation, properties and applications
Publisher: Elsevier BV
Date: 05-2015
Holey Assembly of Two‐Dimensional Iron‐Doped Nickel‐Cobalt Layered Double Hydroxide Nanosheets for Energy Conversion Application
Publisher: Wiley
Date: 08-08-2019
Abstract: Layered double hydroxides (LDHs) containing first-row transition metals such as Fe, Co, and Ni have attracted significant interest for electrocatalysis owing to their abundance and excellent performance for the oxygen evolution reaction (OER) in alkaline media. Herein, the assembly of holey iron-doped nickel-cobalt layered double hydroxide (NiCo-LDH) nanosheets ('holey nanosheets') is demonstrated by employing uniform Ni-Co glycerate spheres as self-templates. Iron doping was found to increase the rate of hydrolysis of Ni-Co glycerate spheres and induce the formation of a holey interconnected sheet-like structure with small pores (1-10 nm) and a high specific surface area (279 m
Irreversible Pressure-Induced Transformation of Boron Nitride Nanotubes
Publisher: American Scientific Publishers
Date: 06-2007
DOI: 10.1166/JNN.2007.721
Abstract: We have used Raman spectroscopy to study the behavior of multi-walled boron nitride nanotubes and hexagonal boron nitride crystals under high pressure. While boron nitride nanotubes show an irreversible transformation at about 12 GPa, hexagonal boron nitride exhibits a reversible phase transition at 13 GPa. We also present molecular dynamics simulations which suggest that the irreversibility of the pressure-induced transformation in boron nitride nanotubes is due to the polar nature of the bonds between boron and nitrogen.
BNnanotubes coated with uniformly distributed Fe3O4nanoparticles: novel magneto-operable nanocomposites
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B916971G
Atomic resolution of single-walled carbon nanotubes using a field emission high-resolution transmission electron microscope
Publisher: Elsevier BV
Date: 1999
Highly dispersed secondary building unit-stabilized binary metal center on a hierarchical porous carbon matrix for enhanced oxygen evolution reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0NR05941B
Abstract: MOF-derived carbon matrix with binary metal center shows high electrochemical activity toward OER.
Noncovalent Functionalization of Boron Nitride Nanotubes in Aqueous Media Opens Application Roads in Nanobiomedicine
Publisher: SAGE Publications
Date: 2014
DOI: 10.5772/60000
Abstract: Boron nitride nanotubes (BNNTs) are of intense scientific interest due to their unique physiochemical properties and prospective applications in various nanotechnologies, particularly nanobiomedicine. A critical problem h ering the application processing of BNNTs is the outer sidewall functionalization, which is primarily acquired to lead BNNTs dispersible in various solvents. Furthermore, the surface of BNNTs should be intelligently designed and precisely controlled to satisfy the specific demands of different applications. For these purposes, covalent and noncovalent approaches have been factually developed to help to extend the full potential of applications. Importantly, wrapping the outermost sidewall of BNNTs with either water-soluble polymers or biomolecules through weak noncovalent interactions has been proved to be efficient for giving BNNTs considerable dispersity in aqueous media, and endowing novel chemical functions to BNNTs with almost no change in their pristine physiochemical properties. This article summarizes recent progress in this field and addresses future perspectives on the noncovalent functionalization of BNNTs for promoting their application processing in various bio-related nanotechnologies.
Utilization of multiwalled boron nitride nanotubes for the reinforcement of lightweight aluminum ribbons
Publisher: Springer Science and Business Media LLC
Date: 02-01-2013
Abstract: Multiwalled boron nitride nanotubes (BNNTs) have very attractive mechanical and thermal properties, e.g., elasticity, tensile strength, and high resistance to oxidation, and may be considered as ideal reinforcing agents in lightweight metal matrix composites. Herein, for the first time, Al-BNNT ribbons with various BNNT contents (up to 3 wt.%) were fabricated via melt spinning in an argon atmosphere. BNNTs were randomly dispersed within a microcrystalline Al matrix under ribbon casting and led to more than doubling of room-temperature ultimate tensile strength of the composites compared to pure Al ribbons produced at the similar conditions.
Statistically Analyzed Photoresponse of Elastically Bent CdS Nanowires Probed by Light-Compatible In Situ High-Resolution TEM
Publisher: American Chemical Society (ACS)
Date: 09-09-2016
DOI: 10.1021/ACS.NANOLETT.6B01614
Abstract: We demonstrate that high resolution transmission electron microscopy (HRTEM) paired with light illumination of a s le and its electrical probing can be utilized for the in situ study of initiated photocurrents in free-standing nanowires. Morphology, phase and crystallographic information from numerous in idual CdS nanowires is obtained simultaneously with photocurrent measurements. Our results indicate that elastically bent CdS nanowires possessing a wurtzite structure show statistically unchanged values of ON/OFF (photocurrent/dark current) ratios. Photocurrent spectroscopy reveals red shifts of several nanometers in the cutoff wavelength after nanowire bending. This results from deformation-induced lattice strain and associated changes in the nanowire band structure, as confirmed by selected area electron diffraction (SAED) analyses and density functional tight binding (DFTB) simulations. The ON/OFF ratio stabilities and photocurrent spectroscopy shift of bent CdS nanowires are important clues for future flexible electronics, optoelectronics, and photovoltaics.
High-temperature shape memory effect in Ti50Pd50 − xNix (x = 10, 15, 20) alloys
Publisher: Elsevier BV
Date: 03-1995
Crystal facet engineering induced anisotropic transport of charge carriers in a perovskite
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TC04961K
Abstract: Precise control of crystal orientations and macroscopic morphology of a perovskite crystal is crucial for various optoelectronic applications relying on charge carrier transport tuning along exposed crystal facets.
Tailorable nanoarchitecturing of bimetallic nickel–cobalt hydrogen phosphate via the self-weaving of nanotubes for efficient oxygen evolution
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA13442E
Abstract: This work reports the fabrication of bimetallic nickel–cobalt hydrogen phosphate with unique nanotube-assembled 1D and 2D architectures for electrocatalytic OER.
Enhancing superplasticity of engineering ceramics by introducing BN nanotubes
Publisher: IOP Publishing
Date: 30-10-2007
Oxygen-containing hexagonal boron nitride with an extremely small amount of Pt in CO oxidation
Publisher: Elsevier BV
Date: 04-2023
Boron–oxygen luminescence centres in boron–nitrogen systems
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B711807D
Abstract: Closed-shell BO(2)(-) and BO(-) anions are proposed as high-efficiency luminescence centres in boron-nitrogen systems, which makes the anions localized and leads to a radiation transition.
Dielectric and thermal properties of epoxy/boron nitride nanotube composites
Publisher: Walter de Gruyter GmbH
Date: 11-08-2010
Abstract: We report the fabrication of and investigations into the dielectric and thermal properties of epoxy/boron nitride nanotube (BNNT) composites. It was found that BNNT fillers can effectively adjust the dielectric constant of epoxy. Moreover, the thermal conductivity of epoxy was improved by up to 69 % with 5 wt % BNNTs. Our studies indicate that BNNTs are promising nanofillers for polymers, to obtain and control an adjustable dielectric property and improved thermal conductivity.
Single‐Crystal Nanotubes of II3–V2 Semiconductors
Publisher: Wiley
Date: 14-11-2006
Novel Ni-Cr-C alloys with chromium carbide whiskers
Publisher: Elsevier BV
Date: 07-2018
Proceedings of the E-MRS 2007 Symposia L and M: Electron Transport in Low-Dimensional Carbon Structures and Science and Technology of Nanotubes and Nanowires
Publisher: Elsevier BV
Date: 05-2008
BN Nanosheet/Polymer Films with Highly Anisotropic Thermal Conductivity for Thermal Management Applications
Publisher: American Chemical Society (ACS)
Date: 04-12-2017
Abstract: The development of advanced thermal transport materials is a global challenge. Two-dimensional nanomaterials have been demonstrated as promising candidates for thermal management applications. Here, we report a boron nitride (BN) nanosheet olymer composite film with excellent flexibility and toughness prepared by vacuum-assisted filtration. The mechanical performance of the composite film is highly flexible and robust. It is noteworthy that the film exhibits highly anisotropic properties, with superior in-plane thermal conductivity of around 200 W m
Real-Time In Situ HRTEM-Resolved Resistance Switching of Ag2S Nanoscale Ionic Conductor
Publisher: American Chemical Society (ACS)
Date: 16-04-2010
DOI: 10.1021/NN100483A
Abstract: The switching behaviors of ionic/electronic mixed conductor-based solid electrolyte nonvolatile memories have been attributed to repetitive formation and breakage of the conductive pathways inside a solid electrolyte. However, direct evidence of such pathway existence and their formations has never been provided. Herein, we reproduced the switching behavior of a Ag/Ag(2)S/W sandwich structure inside a high-resolution transmission electron microscope equipped with a scanning tunneling microscope unit. The on/off current ratio of 5 orders of magnitude was documented. The in situ formation and breakage of a nanoscale conductive channel were ultimately verified in real time and under atomic resolution. We found that a conducting Ag(2)S argentite phase and a Ag nanocrystal together formed the ionic and electronic conductive channel. The preferential atomic sites for Ag nanocrystal growth within the argentite phase were finally clarified.
A facile, environmentally friendly synthesis of strong photo-emissive methylammonium lead bromide perovskite nanocrystals enabled by ionic liquids
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0GC01081B
Abstract: An ionic liquid-based green synthesis of perovskite nanocrystals towards practical applications.
Novel unconventional inorganic nanowires: fabrication, structural analysis and electrical property evaluation
Publisher: Springer Science and Business Media LLC
Date: 26-09-2006
Cerium Oxide Nanotubes Prepared from Cerium Hydroxide Nanotubes
Publisher: Wiley
Date: 16-12-2005
Highly Water-Soluble, Porous, and Biocompatible Boron Nitrides for Anticancer Drug Delivery
Publisher: American Chemical Society (ACS)
Date: 07-05-2014
DOI: 10.1021/NN5014808
Abstract: Developing materials for "Nano-vehicles" with clinically approved drugs encapsulated is envisaged to enhance drug therapeutic effects and reduce the adverse effects. However, design and preparation of the biomaterials that are porous, nontoxic, soluble, and stable in physiological solutions and could be easily functionalized for effective drug deliveries are still challenging. Here, we report an original and simple thermal substitution method to fabricate perfectly water-soluble and porous boron nitride (BN) materials featuring unprecedentedly high hydroxylation degrees. These hydroxylated BNs are biocompatible and can effectively load anticancer drugs (e.g., doxorubicin, DOX) up to contents three times exceeding their own weight. The same or even fewer drugs that are loaded on such BN carriers exhibit much higher potency for reducing the viability of LNCaP cancer cells than free drugs.
Synthesis and Characterization of Folate Conjugated Boron Nitride Nanocarriers for Targeted Drug Delivery
Publisher: American Chemical Society (ACS)
Date: 08-12-2017
Dispersible Shortened Boron Nitride Nanotubes with Improved Molecule‐Loading Capacity
Publisher: Wiley
Date: 15-06-2011
Abstract: The oxidation process of boron nitride nanotubes was thoroughly investigated, and a slow oxidation characteristic was clearly revealed. Subsequently, the controllable oxidation process was utilized to break the sturdy structure of the boron nitride nanotubes to fabricate shortened nanotubes. The shortened boron nitride nanotubes were found to possess good solubility in water and many organic solvents. Further experiments demonstrated remarkably improved molecule-loading capacity of the shortened boron nitride nanotubes. These dispersible shortened boron nitride nanotubes might have the potential to be developed as effective delivery systems for various molecules, which may find applications in bio-related fields.
High-yield synthesis of single-crystalline zinc oxide nanobelts and their applications in novel Schottky solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC12419F
Abstract: High-quality ZnO nanobelts were synthesized through introducing an unsteady state in the vapour transport process and their applications in novel Schottky solar cells were demonstrated by contact-printing the ZnO nanobelt network onto a pre-patterned Pt electrode followed by the deposition of a Ti/Au electrode.
Unconventional Zigzag Indium Phosphide Single-Crystalline and Twinned Nanowires
Publisher: American Chemical Society (ACS)
Date: 02-09-2006
DOI: 10.1021/JP057312E
Abstract: Unconventional zigzag indium phosphide (InP) single-crystalline and twinned nanowires were produced via thermal evaporation of indium phosphide in the presence of zinc selenide. The structure and morphology of the as-synthesized products were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Studies found that two type of nanowires exist in the products, namely, the periodic-rhombus-decorated single-crystalline InP (type I) nanowires and jagged twinned InP (type II) nanowires. Both of them have preferential 111 growth directions. The optical properties were also investigated at room temperature, and they show that the nanowires display a strong emission at approximately 750 nm, which is quite different from that observed in all previous reports related to the InP nanostructures.
“White Graphenes”: Boron Nitride Nanoribbons via Boron Nitride Nanotube Unwrapping
Publisher: American Chemical Society (ACS)
Date: 28-10-2010
DOI: 10.1021/NL103251M
Abstract: Inspired by rich physics and functionalities of graphenes, scientists have taken an intensive interest in two-dimensional (2D) crystals of h-BN (analogue of graphite, so-called "white" graphite). Recent calculations have predicted the exciting potentials of BN nanoribbons in spintronics due to tunable magnetic and electrical properties however no experimental evidence has been provided since fabrication of such ribbons remains a challenge. Here, we show that few- and single-layered BN nanoribbons, mostly terminated with zigzag edges, can be produced under unwrapping multiwalled BN nanotubes through plasma etching. The interesting stepwise unwrapping and intermediate states were observed and analyzed. Opposed to insulating primal tubes, the nanoribbons become semiconducting due to doping-like conducting edge states and vacancy defects, as revealed by structural analyses and ab initio simulations. This study paves the way for BN nanoribbon production and usage as functional semiconductors with a wide range of applications in optoelectronics and spintronics.
Real-time monitoring of scale formation in reverse osmosis using electrical impedance spectroscopy
Publisher: Elsevier BV
Date: 03-2014
Porous BCN Nanotubular Fibers: Growth and Spatially Resolved Cathodoluminescence
Publisher: American Chemical Society (ACS)
Date: 26-10-2005
DOI: 10.1021/JA054887G
Abstract: Porous boron carbonitride nanotubular fibers with BCN stoichiometry and homogeneous B, C, and N species distribution were fabricated via the CVD method. Spatially resolved cathodoluminescence measurements on in idual nanostructures revealed intense ultraviolet emission centered at 319 nm, suggesting the characteristics of a semiconductor with a band gap of 3.89 eV. It is believed that the present nanostructures may have a variety of applications in ultraviolet optical devices, hydrogen storage systems, and field emission apparatus.
Recent developments in inorganically filled carbon nanotubes: successes and challenges
Publisher: Informa UK Limited
Date: 10-2010
Exfoliating the inorganics
Publisher: Springer Science and Business Media LLC
Date: 04-2011
Abstract: A versatile method for the production of sheets of inorganic compounds with atomic thickness has been demonstrated.
Metagenomic Analysis of in Vitro Ruminal Fermentation Reveals the Role of the Copresent Microbiome in Plant Biomass Degradation
Publisher: American Chemical Society (ACS)
Date: 19-09-2022
Chemical Unzipping of WS2 Nanotubes
Publisher: American Chemical Society (ACS)
Date: 24-07-2013
DOI: 10.1021/NN4029635
Abstract: WS2 nanoribbons have been synthesized by chemical unzipping of WS2 nanotubes. Lithium atoms are intercalated in WS2 nanotubes by a solvothermal reaction with n-butyllithium in hexane. The lithiated WS2 nanotubes are then reacted with various solvents--water, ethanol, and long chain thiols. While the tubes break into pieces when treated with water and ethanol, they unzip through longitudinal cutting along the axes to yield nanoribbons when treated with long chain thiols, 1-octanethiol and 1-dodecanethiol. The slow diffusion of the long chain thiols reduces the aggression of the reaction, leading to controlled opening of the tubes.
DNA‐Mediated Assembly of Boron Nitride Nanotubes
Publisher: Wiley
Date: 27-11-2007
Abstract: The dispersion of nanomaterials in solutions is of primary importance for the improvement of their processability, but it also provides a way to investigate phase behavior and to assemble nanostructures in solvents. Several methods based on different interactions have been developed to disperse carbon nanotubes, whereas little development has been made for their boron nitride nanotube (BNNT) counterparts. A direct way to obtain long-range ordering may be through spontaneous nematic ordering in solutions at sufficiently high concentrations of the nanomaterial fraction. Lyotropic nematics have been observed in various organic and inorganic systems. In this work, the strong interactions between DNA and BNNTs were exploited to fabricate high-concentration BNNTs aqueous solutions by a simple method, and then, for the first time, nematic ordered ensembles of BNNTs were obtained by filtration. It is proposed that a localized liquid-crystal phase appears during filtration, as the ordering trend for the BNNTs was found to depend on the concentration of the aqueous solutions of the BNNTs. Moreover, BNNTs were successfully localized on a predefined area by using a thiol-modified DNA-BNNT hybrid.
Tensile Tests on Individual Single‐Walled Carbon Nanotubes: Linking Nanotube Strength with Its Defects
Publisher: Wiley
Date: 17-08-2010
Improved cycling stability of NiS2 cathodes through designing a “kiwano” hollow structure
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA01551A
Abstract: NiS 2 with a unique “kiwano” structure was designed by a novel method. It showed superior cycle stability in LIBs.
Towards ultrahigh volumetric capacitance: graphene derived highly dense but porous carbons for supercapacitors
Publisher: Springer Science and Business Media LLC
Date: 17-10-2013
DOI: 10.1038/SREP02975
Recent developments in single-crystal inorganic nanotubes synthesised from removable templates
Publisher: Inderscience Publishers
Date: 2007
Science and technology of nanotubes, nanowires and graphene
Publisher: Elsevier BV
Date: 05-2008
Genomic insights into the phylogeny and biomass-degrading enzymes of rumen ciliates
Publisher: Springer Science and Business Media LLC
Date: 19-08-2022
Current Imaging and Electromigration-Induced Splitting of GaN Nanowires As Revealed by Conductive Atomic Force Microscopy
Publisher: American Chemical Society (ACS)
Date: 17-03-2010
DOI: 10.1021/NN100223J
Abstract: Current images of electromigration-induced common vapor-liquid-solid-grown GaN nanowires were obtained using a conductive atomic force microscope. Structural characterization indicated that these wurtzite (ZW) [0110] nanowires contained longitudinal zinc blende (ZB) defects as stacking faults. The current was attributed to tunneling current through the Schottky barrier between the AFM tip and a nanowire, which was dominated by the local nanowire surface work function. Due to the electromigration induced by large current densities around the defects, the axial splitting process of the nanowires was directly observed under continuous current scanning. The electromigration was likely enhanced by non-uniformly distributed electrostatic pressure around the axial ZW/ZB domain interfaces.
Large-surface-area BN nanosheets and their utilization in polymeric composites with improved thermal and dielectric properties
Publisher: Springer Science and Business Media LLC
Date: 30-11-2012
Transformation of ionic liquid into carbon nanotubes in confined nanospace
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC14154F
Abstract: We have developed a two-step filling process for the nano-reaction of ionic liquid in a tip-closed SWNT, where fullerenes are inserted at the end of the host SWNT as a plug to prevent the leakage of the confined ionic liquid during heat treatment.
Experimental analysis of the morphology and nanostructure of soot particles for butanol/diesel blends at different engine operating modes
Publisher: American Chemical Society (ACS)
Date: 15-05-2019
Thin-walled B–C–N ternary microtubes: from synthesis to electrical, cathodoluminescence and field-emission properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM16844H
Single‐Crystalline CdS Nanobelts for Excellent Field‐Emitters and Ultrahigh Quantum‐Efficiency Photodetectors
Publisher: Wiley
Date: 03-08-2010
Structure and nitrogen incorporation of carbon nanotubes synthesized by catalytic pyrolysis of dimethylformamide
Publisher: Elsevier BV
Date: 2004
Oriented Assemblies of ZnS One‐Dimensional Nanostructures
Publisher: Wiley
Date: 20-04-2004
Abstract: Oriented ZnS nanobelt arrays and ZnS multicore microcables consisting of oriented nanowire bundles with sheaths (see Figure) have been synthesized via a controlled thermal process. Both the ZnS nanowires and nanobelts are single crystals grown along the [001] axis. The special structures of the oriented assemblies of ZnS one‐dimensional nanostructures may have potential applications in nanoelectronics and photonics.
Growth of Single-Crystal Ca10(Pt4As8)(Fe1.8Pt0.2As2)5 Nanowhiskers with Superconductivity up to 33 K
Publisher: American Chemical Society (ACS)
Date: 24-02-2012
DOI: 10.1021/JA212067G
Abstract: Single-crystal Ca(10)(Pt(4)As(8))(Fe(1.8)Pt(0.2)As(2))(5) superconducting (SC) nanowhiskers with widths down to hundreds of nanometers were successfully grown in a Ta capsule in an evacuated quartz tube by a flux method. Magnetic and electrical properties measurements demonstrate that the whiskers have excellent crystallinity with critical temperature of up to 33 K, upper critical field of 52.8 T, and critical current density of J(c) of 6.0 × 10(5) A/cm(2) (at 26 K). Since cuprate high-T(c) SC whiskers are fragile ceramics, the present intermetallic SC whiskers with high T(c) have better opportunities for device applications. Moreover, although the growth mechanism is not understood well, the technique can be potentially useful for growth of other whiskers containing toxic elements.
A Two‐Stage Route to Coaxial Cubic‐Aluminum‐Nitride–Boron‐ Nitride Composite Nanotubes
Publisher: Wiley
Date: 04-06-2004
ZnS quantum dots@multilayered carbon: geological-plate-movement-inspired design for high-energy Li-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA01667D
Abstract: Inspired by the geological plate movements that release the inner stresses of the Earth, a ZnS anode material composed of ZnS quantum dots@carbon nanosheets stacked together is designed for high-energy Li-ion batteries.
Diagnosis of membrane bioreactor performance through residence time distribution measurements - a preliminary study
Publisher: Elsevier BV
Date: 2009
Nanomaterial Engineering and Property Studies in a Transmission Electron Microscope
Publisher: Wiley
Date: 14-10-2011
Abstract: Modern methods of in situ transmission electron microscopy (TEM) allow one to not only manipulate with a nanoscale object at the nanometer-range precision but also to get deep insights into its physical and chemical statuses. Dedicated TEM holders combining the capabilities of a conventional high-resolution TEM instrument and atomic force -, and/or scanning tunneling microscopy probes become the powerful tools in nanomaterials analysis. This progress report highlights the past, present and future of these exciting methods based on the extensive authors endeavors over the last five years. The objects of interest are erse. They include carbon, boron nitride and other inorganic one- and two-dimensional nanoscale materials, e.g., nanotubes, nanowires and nanosheets. The key point of all experiments discussed is that the mechanical and electrical transport data are acquired on an in idual nanostructure level under ultimately high spatial, temporal and energy resolution achievable in TEM, and thus can directly be linked to morphological, structural and chemical peculiarities of a given nanomaterial.
Sn-filled single-crystalline wurtzite-type ZnS nanotubes
Publisher: Wiley
Date: 09-2004
Structure, transport and field-emission properties of compound nanotubes: CN x vs. BNC x ( x <0.1)
Publisher: Springer Science and Business Media LLC
Date: 03-2003
Thermal Conductivity Improvement of Polymer Films by Catechin-Modified Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 14-07-2009
DOI: 10.1021/JP903159S
Silica Fibers with Triangular Cross Sections
Publisher: Wiley
Date: 18-07-2006
Purification of Boron Nitride Nanotubes through Polymer Wrapping
Publisher: American Chemical Society (ACS)
Date: 11-01-2006
DOI: 10.1021/JP054941F
Abstract: An effective method was proposed to remove obstinate boron nitride phase impurities in boron nitride nanotubes (BNNTs). The method is based on strong interactions between BNNTs and a conjugated polymer wrapping them and significant weight and size difference between BNNTs and impurities. The as-grown s les and purified s les were compared through detailed characterization, using scanning electron microscopy, transmission electron microscopy, and Raman and Fourier transformed infrared spectroscopy. The results reveal that impurities are effectively removed and resultant BNNTs possess perfect crystallization.
Multi-heteroatom doped nanocarbons for high performance double carbon potassium ion capacitor
Publisher: Elsevier BV
Date: 09-2021
Pristine and Antibiotic-Loaded Nanosheets/Nanoneedles-Based Boron Nitride Films as a Promising Platform to Suppress Bacterial and Fungal Infections
Publisher: American Chemical Society (ACS)
Date: 26-08-2020
Controlled synthesis of patterned W18O49 nanowire vertical-arrays and improved field emission performance by in situ plasma treatment
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TC30340C
Enhanced Li‐Ion‐Storage Performance of MoS2 through Multistage Structural Design
Publisher: Wiley
Date: 11-01-2019
Single crystal growth and characterization of binary stoichiometric and Al-rich Ni3Al
Publisher: Elsevier BV
Date: 03-1998
Large‐Scale Fabrication of Boron Nitride Nanosheets and Their Utilization in Polymeric Composites with Improved Thermal and Mechanical Properties
Publisher: Wiley
Date: 27-07-2009
Effect of BN Nanoparticles Loaded with Doxorubicin on Tumor Cells with Multiple Drug Resistance.
Publisher: American Chemical Society (ACS)
Date: 15-09-2017
Abstract: Herein we study the effect of doxorubicin-loaded BN nanoparticles (DOX-BNNPs) on cell lines that differ in the multidrug resistance (MDR), namely KB-3-1 and MDR KB-8-5 cervical carcinoma lines, and K562 and MDR i-S9 leukemia lines. We aim at revealing the possible differences in the cytotoxic effect of free DOX and DOX-BNNP nanoconjugates on these types of cells. The spectrophotometric measurements have demonstrated that the maximum amount of DOX in the DOX-BNNPs is obtained after saturation in alkaline solution (pH 8.4), indicating the high efficiency of BNNPs saturation with DOX. DOX release from DOX-BNNPs is a pH-dependent and DOX is more effectively released in acid medium (pH 4.0-5.0). Confocal laser scanning microscopy has shown that the DOX-BNNPs are internalized by neoplastic cells using endocytic pathway and distributed in cell cytoplasm near the nucleus. The cytotoxic studies have demonstrated a higher sensitivity of the leukemia lines to DOX-BNNPs compared with the carcinoma lines: IC
Coaxial Cu–Si@C array electrodes for high-performance lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC15595D
Abstract: A new concept for fabricating novel triple-layered nanorod array electrodes made of coaxial Cu-Si@C arrays has been developed. They exhibit excellent electrochemical performance resulting from peculiar new sandwiched architectures: robust Cu nanopillar cores/amorphous Si layers/elastic carbon shells.
Recent Developments in One‐Dimensional Inorganic Nanostructures for Photodetectors
Publisher: Wiley
Date: 22-11-2010
Field Nanoemitters: Ultrathin BN Nanosheets Protruding from Si3N4 Nanowires
Publisher: American Chemical Society (ACS)
Date: 11-2006
DOI: 10.1021/NL061594S
Abstract: Field emitters in nanoscale are important in micro/nanoelectronic devices. Here, we report a large scale synthesis and effective field emission of field nanoemitters. The integrated nanostructures of ultrathin BN nanosheets aligned on Si3N4 nanowires are prepared through a two-stage process. Si3N4 nanowires were previously synthesized through heating Si powder at 1500 degrees C under a N2 atmosphere. Ultrathin BN nanosheets were then deposited on Si3N4 nanowires by heating a homemade B-N-O precursor under a N2/NH3 atmosphere. The as-prepared nanofilaments act as cold electron emitters displaying excellent field emission performance owing to the untrathin and sharp edges of the protruding BN nanosheets.
Biodegradable and Peroxidase‐Mimetic Boron Oxynitride Nanozyme for Breast Cancer Therapy
Publisher: Wiley
Date: 30-06-2021
Abstract: Nanomaterials having enzyme‐like activities are recognized as potentially important self‐therapeutic nanomedicines. Herein, a peroxidase‐like artificial enzyme is developed based on novel biodegradable boron oxynitride (BON) nanostructures for highly efficient and multi‐mode breast cancer therapies. The BON nanozyme catalytically generates cytotoxic hydroxyl radicals, which induce apoptosis of 4T1 cancer cells and significantly reduce the cell viability by 82% in 48 h. In vivo experiment reveals a high potency of the BON nanozyme for breast tumor growth inhibitions by 97% after 14‐day treatment compared with the control, which are 10 times or 1.3 times more effective than the inert or B‐releasing boron nitride (BN) nanospheres, respectively. This work highlights the BON nanozyme and its functional integrations within the BN nanomedicine platform for high‐potency breast cancer therapies.
Biomass-Directed Synthesis of 20 g High-Quality Boron Nitride Nanosheets for Thermoconductive Polymeric Composites
Publisher: American Chemical Society (ACS)
Date: 25-08-2014
DOI: 10.1021/NN502486X
Abstract: Electrically insulating boron nitride (BN) nanosheets possess thermal conductivity similar to and thermal and chemical stabilities superior to those of electrically conductive graphenes. Currently the production and application of BN nanosheets are rather limited due to the complexity of the BN binary compound growth, as opposed to massive graphene production. Here we have developed the original strategy "biomass-directed on-site synthesis" toward mass production of high-crystal-quality BN nanosheets. The strikingly effective, reliable, and high-throughput (dozens of grams) synthesis is directed by erse biomass sources through the carbothermal reduction of gaseous boron oxide species. The produced BN nanosheets are single crystalline, laterally large, and atomically thin. Additionally, they assemble themselves into the same macroscopic shapes peculiar to original biomasses. The nanosheets are further utilized for making thermoconductive and electrically insulating epoxy/BN composites with a 14-fold increase in thermal conductivity, which are envisaged to be particularly valuable for future high-performance electronic packaging materials.
Quasi-aligned single-crystalline GaN nanowire arrays
Publisher: AIP Publishing
Date: 09-08-2005
DOI: 10.1063/1.2011794
Abstract: Quasi-aligned GaN nanowire arrays have been fabricated via a thermal evaporation of the starting reactants Ga2O3∕GaN. The GaN nanowires have uniform diameters of ∼300nm, lengths up to tens of micrometers and possess a sharp six-fold symmetrical pyramidlike tip. High-resolution transmission electron microscopy (TEM) analysis indicated that majority of GaN nanowires have a preferential growth direction along the [0001] direction. Room-temperature field-emission measurement showed that the as-synthesized GaN nanowire arrays have a lower turn-on field of 7.0V/μm. It is believed that both the sharp tips and rough surface of GaN nanowires contribute to the excellent electron emission behavior.
Powder metallurgy routes toward aluminum boron nitride nanotube composites, their morphologies, structures and mechanical properties
Publisher: Elsevier BV
Date: 05-2014
Carbon-Integrated Vanadium Oxide Hydrate as a High-Performance Cathode Material for Aqueous Zinc-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 21-03-2022
Borophene: Two-dimensional Boron Monolayer: Synthesis, Properties, and Potential Applications
Publisher: American Chemical Society (ACS)
Date: 03-11-2021
Multinodular and Vacuolating Neuronal Tumor of the Cerebrum: A New “Leave Me Alone” Lesion with a Characteristic Imaging Pattern
Publisher: American Society of Neuroradiology (ASNR)
Date: 13-07-2017
DOI: 10.3174/AJNR.A5281
Boron nitride nanotube‐enhanced osteogenic differentiation of mesenchymal stem cells
Publisher: Wiley
Date: 12-03-2015
DOI: 10.1002/JBM.B.33391
Abstract: The interaction between boron nitride nanotubes (BNNTs) layer and mesenchymal stem cells (MSCs) is evaluated for the first time in this study. BNNTs layer supports the attachment and growth of MSCs and exhibits good biocompatibility with MSCs. BNNTs show high protein adsorption ability, promote the proliferation of MSCs and increase the secretion of total protein by MSCs. Especially, BNNTs enhance the alkaline phosphatase (ALP) activity as an early marker of osteoblasts, ALP/total protein and osteocalcin (OCN) as a late marker of osteogenic differentiation, which shows that BNNTs can enhance osteogenesis of MSCs. The release of trace boron and the stress on cells exerted by BNNTs with a fiber structure may account for the enhanced differentiation of MSCs into osteoblasts. Therefore BNNTs are potentially useful for bone regeneration in orthopedic applications.
Effects of stoichiometry, microalloying and aging heat treatments on the compressive behavior of NiAl alloys
Publisher: Elsevier BV
Date: 15-06-1997
Computational fluid dynamics simulations of MBRs: Inside submerged versus outside submerged membranes
Publisher: Elsevier BV
Date: 2009
Oxygen Vacancy Driven Modulations in In2O3 Pyramidal Beaded Nanowires
Publisher: American Chemical Society (ACS)
Date: 11-09-2012
DOI: 10.1021/CG300870Y
Carbon “Onions” as Point Electron Sources
Publisher: American Chemical Society (ACS)
Date: 20-07-2010
DOI: 10.1021/NN1013353
Abstract: The novel type of an electron field emitter is demonstrated by welding a single carbon "onion" onto the end of a tungsten tip inside a high-resolution transmission electron microscope. Such merged structure is found to markedly reduce the onset voltage peculiar to a standard tungsten field emitter due to the small size of the onion and its highly curved surface. Similar to short carbon nanotubes, in idual C-onion emitters can sustain large emission currents, more than 100 muA, and exhibit good long-term emission stability. Moreover the insertion of a high electrical resistance in series can suppress the current fluctuation to only 1.9%. All these properties make these newly created field emitters promising candidates for the advanced point electron sources.
Cable‐Type Supercapacitors of Three‐Dimensional Cotton Thread Based Multi‐Grade Nanostructures for Wearable Energy Storage
Publisher: Wiley
Date: 29-07-2013
Abstract: A novel cable-type flexible supercapacitor with excellent performance is fabricated using 3D polypyrrole(PPy)-MnO2 -CNT-cotton thread multi-grade nanostructure-based electrodes. The multiple supercapacitors with a high areal capacitance 1.49 F cm(-2) at a scan rate of 1 mV s(-1) connected in series and in parallel can successfully drive a LED segment display. Such an excellent performance is attributed to the cumulative effect of conducting single-walled carbon nanotubes on cotton thread, active mesoporous flower-like MnO2 nanoplates, and PPy conductive wrapping layer improving the conductivity, and acting as pseudocapacitance material simultaneously.
Theoretical aspects of WS2 nanotube chemical unzipping
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR00437J
Abstract: Theoretical analysis of experimental data on unzipping multilayered WS 2 nanotubes by consequent intercalation of lithium atoms and 1-octanethiol molecules [C. Nethravathi, et al. , ACS Nano , 2013, 7 , 7311] is presented.
Length Fractionation of Boron Nitride Nanotubes Using Creamed Oil-in-Water Emulsions
Publisher: American Chemical Society (ACS)
Date: 11-02-2014
DOI: 10.1021/LA404961P
Abstract: The fractionation by length of multiwalled boron nitride nanotubes (BNNTs) was achieved by emulsification and creaming of an oil/water/surfactant mixture. The length separation is based on the fact that nanoparticle-coated oil droplets polydisperse in size move toward the upper surface or the bottom of an emulsified mixture depending on the density of the droplets, such that droplets of different sizes are located at different heights. By s ling heightwise an unstable hexane/water/Tween 20/BNNT (1-20 μm long) emulsion, we observed that the lengths of the BNNTs adsorbed on the droplets display a strong correlation with the droplets sizes, thus leading to selective separation of the BNNT lengths, as confirmed by dark-field optical imaging and dynamic light scattering. This method may potentially be extended to other high aspect ratio nanomaterials exhibiting emulsification properties similar to those of BNNTs.
One stone, two birds: Gastrodia elata-derived heteroatom-doped carbon materials for efficient oxygen reduction electrocatalyst and as fluorescent decorative materials
Publisher: Elsevier BV
Date: 11-2013
Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles.
Publisher: American Chemical Society (ACS)
Date: 29-05-2018
DOI: 10.1021/ACS.LANGMUIR.8B00401
Abstract: Metal-semiconductor hybrid nanomaterials are becoming increasingly popular for photocatalytic degradation of organic pollutants. Herein, a seed-assisted photodeposition approach is put forward for the site-specific growth of Pt on Au-ZnO particles (Pt-Au-ZnO). A similar approach was also utilized to enlarge the Au nanoparticles at epitaxial Au-ZnO particles (Au@Au-ZnO). An epitaxial connection at the Au-ZnO interface was found to be critical for the site-specific deposition of Pt or Au. Light on-off photocatalysis tests, utilizing a thiazine dye (toluidine blue) as a model organic compound, were conducted and confirmed the superior photodegradation properties of Pt-Au-ZnO hybrids compared to Au-ZnO. In contrast, Au-ZnO type hybrids were more effective toward photoreduction of toluidine blue to leuco-toluidine blue. It was deemed that photoexcited electrons of Au-ZnO (Au, ∼5 nm) possessed high reducing power owing to electron accumulation and negative shift in Fermi level/redox potential however, exciton recombination due to possible Fermi-level equilibration slowed down the complete degradation of toluidine blue. In the case of Au@Au-ZnO (Au, ∼15 nm), the photodegradation efficiency was enhanced and the photoreduction rate reduced compared to Au-ZnO. Pt-Au-ZnO hybrids showed better photodegradation and mineralization properties compared to both Au-ZnO and Au@Au-ZnO owing to a fast electron discharge (i.e. better electron-hole seperation). However, photoexcited electrons lacked the reducing power for the photoreduction of toluidine blue. The ultimate photodegradation efficiencies of Pt-Au-ZnO, Au@Au-ZnO, and Au-ZnO were 84, 66, and 39%, respectively. In the interest of effective metal-semiconductor type photocatalysts, the present study points out the importance of choosing the right metal, depending on whether a photoreduction and/or photodegradation process is desired.
Boron nitride nanotube-based amphiphilic hybrid nanomaterials for superior encapsulation of hydrophobic cargos
Publisher: Elsevier BV
Date: 12-2017
In vivo biocompatibility of boron nitride nanotubes: Effects on stem cell biology and tissue regeneration in planarians
Publisher: Future Medicine Ltd
Date: 07-2015
DOI: 10.2217/NNM.15.46
Abstract: Aim: Boron nitride nanotubes (BNNTs) represent an extremely interesting class of nanomaterials, and recent findings have suggested a number of applications in the biomedical field. Anyhow, extensive biocompatibility investigations are mandatory before any further advancement toward preclinical testing. Materials & Methods: Here, we report on the effects of multiwalled BNNTs in freshwater planarians, one of the best-characterized in vivo models for developmental biology and regeneration research. Results & Discussion: Obtained results indicate that BNNTs are biocompatible in the investigated model, since they do not induce oxidative DNA damage and apoptosis, and do not show adverse effects on planarian stem cell biology and on de novo tissue regeneration. In summary, collected findings represent another important step toward BNNT realistic applications in nanomedicine.
Towards Thermoconductive, Electrically Insulating Polymeric Composites with Boron Nitride Nanotubes as Fillers
Publisher: Wiley
Date: 12-06-2009
Observations of the electrical behaviour of catalytically grown scrolled graphene
Publisher: Elsevier BV
Date: 05-2011
Expeditious Electrochemical Synthesis of Mesoporous Chalcogenide Flakes: Mesoporous Cu2Se as a Potential High‐Rate Anode for Sodium‐Ion Battery
Publisher: Wiley
Date: 29-07-2022
Abstract: Nanostructured copper selenide (Cu 2 Se) attracts much interest as it shows outstanding performance as thermoelectric, photo‐thermal, and optical material. The mesoporous structure is also a promising morphology to obtain better performance for electrochemical and catalytic applications, thanks to its high surface area. A simple one‐step electrochemical method is proposed for mesoporous chalcogenides synthesis. The synthesized Cu 2 Se material has two types of mesopores (9 and 18 nm in diameter), which are uniformly distributed inside the flakes. These materials are also implemented for sodium (Na) ion battery (NIB) anode as a proof of concept. The electrode employing the mesoporous Cu 2 Se exhibits superior and more stable specific capacity as a NIB anode compared to the non‐porous s les. The electrode also exhibits excellent rate tolerance at each current density, from 100 to 1000 mA g −1 . It is suggested that the mesoporous structure is advantageous for the insertion of Na ions inside the flakes. Electrochemical analysis indicates that the mesoporous electrode possesses more prominent diffusion‐controlled kinetics during the sodiation–desodiation process, which contributes to the improvement of Na‐ion storage performance.
Non-microbial indicators for monitoring virus removal by ultrafiltration membranes
Publisher: Elsevier BV
Date: 03-2014
Large-scale synthesis and structure of boron nitride sub-micron spherical particles
Publisher: Royal Society of Chemistry (RSC)
Date: 28-10-2002
DOI: 10.1039/B208785E
Abstract: A novel method, combining chemical vapor deposition and pyrolysis of trimethoxyborane under ammonia atmosphere, has been developed to synthesize spherical boron nitride particles with a uniform diameter distribution from 50 to 400 nm chemical composition and high-resolution transmission electron microscopy analyses indicate that the sub-micron boron nitride particles exhibit a slightly distorted arrangement of the shell layers.
Production and State-of-the-Art Characterization of Aligned Nanotubes with Homogeneous BCxN (1 ≤ x ≤ 5) Compositions
Publisher: Wiley
Date: 17-11-2003
Functionalized hexagonal boron nitride nanomaterials: emerging properties and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CS00869G
Abstract: Chemical and physical functionalization of hexagonal boron nitride materials breeds new properties and applications.
Crystal orientation-ordered ZnS nanobelt quasi-arrays and their enhanced field-emission
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B705410F
Abstract: Crystal orientation-ordered ZnS nanobelt quasi-arrays were fabricated using a non-catalytic and template-free thermal evaporation process field-emission measurements show that these novel arrays are decent field emitters possessing a current density more than 20 times higher than that of randomly-oriented ZnS nanobelt ensembles at a macroscopic field of 5.5 V microm(-1).
New 300 kV Energy-Filtering Field Emission Electron Microscope
Publisher: IOP Publishing
Date: 11-2001
Abstract: In order to observe high-spatial-resolution elemental images using inelastic electrons, a 300 kV energy-filtering transmission electron microscope with an omega-type energy filter has been developed. Some characteristic features of the new microscope are described. The accelerating voltage dependence of the inelastic images is calculated to confirm that the spatial resolution for the elemental images is improved with an increase in the voltage from 120 kV to 300 kV. It is shown that a single atomic layer of oxygen atoms in Al 11 O 3 N 9 crystal is well imaged as a bright line with a periodic separation of 2.9 nm along the c-axis. The spatial resolution for the oxygen images is about 0.5 nm, which corresponds well with the theoretical calculation.
Impact of iron dosing of membrane bioreactors on membrane fouling
Publisher: Elsevier BV
Date: 09-2014
Boron nitride nanotubes
Publisher: Elsevier BV
Date: 11-2010
Electrical Conductivity, Chemistry, and Bonding Alternations under Graphene Oxide to Graphene Transition As Revealed by In Situ TEM
Publisher: American Chemical Society (ACS)
Date: 16-05-2011
DOI: 10.1021/NN103200T
Abstract: A suspended graphene oxide device is fabricated and investigated using a transmission electron microscope (TEM) scanning tunneling microscope (STM) setup. A detailed study of step-by-step reduction of an in idual graphene oxide sheet under current flow and Joule heating in tandem with conductivity measurements, atomic structure imaging, chemical composition, and bonding alternations tracing is performed. As monitored by electron energy loss spectroscopy, the oxygen content is tuned from that peculiar to a pristine graphene oxide (i.e., 23.8 at %) to oxygen-free pure graphene. Six orders of magnitude conductance rise is observed during this process with the final conductivity reaching 1.5 × 10(5) S/m. Quantification of plasma energy losses of the starting graphene oxide shows that ∼40% of the oxygen atoms are in the form of epoxy, and ∼60% oxygen atoms are in the form of hydroxyl. The total portion of sp(3) bonds in pristine graphene oxide is estimated to be ∼45%. The epoxy groups show a larger influence on the conductivity of graphene oxide than hydroxyl ones. Through analyzing consecutive plasma-loss energy spectra under gradual graphene oxide to graphene transformation, it is found that the oxygen atoms in epoxy groups decompose prior to those in hydroxyl groups.
Molecular Photoswitching of Main-Chain α-Bisimines in Solid-State Polymers
Publisher: American Chemical Society (ACS)
Date: 28-06-2023
DOI: 10.1021/JACS.3C03242
Nanotubes of Boron Nitride Filled with Molybdenum Clusters
Publisher: American Scientific Publishers
Date: 03-2001
DOI: 10.1166/JNN.2001.008
Abstract: Carbon nanotubes are known to be metallic or semiconducting, depending on their helicity and diameter. However, boron nitride (BN) nanotubes are the only nanotubular product known to date that are predicted to have stable insulating properties that are independent of their atomic structure and morphology. Thus, the BN tube has attracted prime attention as an advanced nanoinsulating shield for all types of encapsulated conducting material, i.e., metal wires, clusters, etc. However, so far there have been no successes in controlled one-dimensional filling of BN nanotubes with conductive material. We report the first experimental results on the synthesis, high-resolution transmission electron microscopy, energy dispersion X-ray analysis, and electron energy loss spectroscopy of BN nanotubes that are filled with Mo clusters over their entire length. This was accomplished by means of two-step thermochemical treatment of chemically vapor-deposited C nanotubes with B2O3, CuO, and MoO3 oxides in a flowing N2 atmosphere. The first ex les of BN nanotubes filled with molybdenum clusters are reported and the formation of the first nanocable (approximately 10 nm in length), consisting of a conductive metal core and an insulating BN nanotubular shield is demonstrated.
Triple-yolked ZnO/CdS hollow spheres for semiconductor-sensitized solar cells
Publisher: Wiley
Date: 02-03-2014
Single-Crystalline and Twinned Zn3P2 Nanowires: Synthesis, Characterization, and Electronic Properties
Publisher: American Chemical Society (ACS)
Date: 27-09-2008
DOI: 10.1021/JP806334K
Nitrogen‐Doped Carbon with Mesopore Confinement Efficiently Enhances the Tolerance, Sensitivity, and Stability of a Pt Catalyst for the Oxygen Reduction Reaction
Publisher: Wiley
Date: 11-06-2013
Thin-walled boron nitride microtubes exhibiting intense band-edge UV emission at room temperature
Publisher: IOP Publishing
Date: 03-02-2009
DOI: 10.1088/0957-4484/20/8/085705
Abstract: Boron nitride (BN) microtubes were synthesized in a vertical induction furnace using Li(2)CO(3) and B reactants. Their structures and morphologies were investigated using x-ray diffraction, scanning and transmission electron microscopy, and energy-dispersive x-ray spectroscopy. The microtubes have diameters of 1-3 microm, lengths of up to hundreds of micrometers, and well-structured ultrathin walls only approximately 50 nm thick. A mechanism combining the vapor-liquid-solid (VLS) and template self-sacrificing processes is proposed to explain the formation of these novel one-dimensional microstructures, in which the Li(2)O-B(2)O(3) eutectic reaction plays an important role. Cathodoluminescence studies show that even at room temperature the thin-walled BN microtubes can possess an intense band-edge emission at approximately 216.5 nm, which is distinct compared with other BN nanostructures. The study suggests that the thin-walled BN microtubes should be promising for constructing compact deep UV devices and find potential applications in microreactors and microfluidic and drug delivery systems.
Synthetic routes, structure and catalytic activity of Ag/BN nanoparticle hybrids toward CO oxidation reaction
Publisher: Elsevier BV
Date: 12-2018
Nanoscale characterization of the thermal interface resistance of a heat-sink composite material byin situTEM
Publisher: IOP Publishing
Date: 28-10-2015
DOI: 10.1088/0957-4484/26/46/465705
Abstract: We developed an original method of in situ nanoscale characterization of thermal resistance utilizing a high-resolution transmission electron microscope (HRTEM). The focused electron beam of the HRTEM was used as a contact-free heat source and a piezo-movable nanothermocouple was developed as a thermal detector. This method has a high flexibility of supplying thermal-flux directions for nano/microscale thermal conductivity analysis, and is a powerful way to probe the thermal properties of complex or composite materials. Using this method we performed reproducible measurements of electron beam-induced temperature changes in pre-selected sections of a heat-sink α-Al(2)O(3)/epoxy-based resin composite. Observed linear behavior of the temperature change in a filler reveals that Fourier's law holds even at such a mesoscopic scale. In addition, we successfully determined the thermal resistance of the nanoscale interfaces between neighboring α-Al(2)O(3) fillers to be 1.16 × 10(-8) m(2)K W(-1), which is 35 times larger than that of the fillers themselves. This method that we have discovered enables evaluation of thermal resistivity of composites on the nanoscale, combined with the ultimate spatial localization and resolution s le analysis capabilities that TEM entails.
2 Noble Metal Nanoparticles
Publisher: Jenny Stanford Publishing
Date: 05-07-2012
DOI: 10.1201/B12707-6
A genome-wide association meta-analysis identifies new childhood obesity loci
Publisher: Springer Science and Business Media LLC
Date: 08-04-2012
DOI: 10.1038/NG.2247
Structural Changes in Iron Oxide and Gold Catalysts during Nucleation of Carbon Nanotubes Studied by In Situ Transmission Electron Microscopy
Publisher: American Chemical Society (ACS)
Date: 24-12-2013
DOI: 10.1021/NN403927Y
Abstract: We report a simple, versatile in situ transmission electron microscopy (TEM) approach for investigating the nucleation and growth mechanism of carbon nanotubes (CNTs), by which the composition, phase transition, and physical state of various catalysts can be clearly resolved. In our approach, catalyst nanoparticles (NPs) are placed in a multiwall CNT "tubular furnace" with two open ends, and a high temperature is obtained by Joule heating in the specimen chamber of a TEM. The carbon is supplied by electron irradiation-induced injection of carbon atoms. Comparative studies on the catalytic behavior of traditional iron oxide and recently discovered gold catalysts were performed. It was found that the growth of CNTs from iron oxide involves the reduction of Fe2O3 to Fe3C, nucleation and growth of CNTs from partially liquefied Fe3C, and finally the formation of elemental Fe when the growth stops. In contrast, while changes in shape, size, and orientation were also observed for the fluctuating Au NPs, no chemical reactions or phase transitions occurred during the nucleation of CNTs. These two distinct nucleation and growth processes and mechanisms would be valuable for the structure-controlled growth of CNTs by catalyst design and engineering.
Anodic Alumina Membrane Template and Its Derivative Membrane Nanostructures
Publisher: Pan Stanford Publishing
Date: 05-07-2012
DOI: 10.1201/B12707-5
3 Gas-Phase Growth
Publisher: Jenny Stanford Publishing
Date: 05-07-2012
DOI: 10.1201/B12707-3
Seed-Assisted Growth of One-Dimensional Nanostructures
Publisher: Jenny Stanford Publishing
Date: 05-07-2012
DOI: 10.1201/B12707-2
Periodic TiO2 Nanorod Arrays with Hexagonal Nonclose‐Packed Arrangements: Excellent Field Emitters by Parameter Optimization
Publisher: Wiley
Date: 03-08-2009
Mechanical Properties of Si Nanowires as Revealed by in Situ Transmission Electron Microscopy and Molecular Dynamics Simulations
Publisher: American Chemical Society (ACS)
Date: 23-03-2012
DOI: 10.1021/NL204282Y
Abstract: Deformation and fracture mechanisms of ultrathin Si nanowires (NWs), with diameters of down to ~9 nm, under uniaxial tension and bending were investigated by using in situ transmission electron microscopy and molecular dynamics simulations. It was revealed that the mechanical behavior of Si NWs had been closely related to the wire diameter, loading conditions, and stress states. Under tension, Si NWs deformed elastically until abrupt brittle fracture. The tensile strength showed a clear size dependence, and the greatest strength was up to 11.3 GPa. In contrast, under bending, the Si NWs demonstrated considerable plasticity. Under a bending strain of 20%, the cracks nucleated on the tensed side and propagated from the wire surface, whereas on the compressed side a plastic deformation took place because of dislocation activities and an amorphous transition.
High-strength aluminum-based composites reinforced with BN, AlB2 and AlN particles fabricated via reactive spark plasma sintering of Al-BN powder mixtures
Publisher: Elsevier BV
Date: 2017
Enhanced Field Emission Performance of ZnO Nanorods by Two Alternative Approaches
Publisher: American Chemical Society (ACS)
Date: 08-2007
DOI: 10.1021/JP073928N
Single-crystalline nanotubes of IIB-VI semiconductors
Publisher: AIP Publishing
Date: 07-09-2005
DOI: 10.1063/1.2042634
Abstract: Wurtzite-type CdS and CdSe nanotubes have been grown via a Sn nanowire-templated route under thermal annealing. The tubes are structurally uniform and defect-free single crystals, and partially or completely filled with Sn nanowires most of the tubes display pin-like structures showing significant tapering along their axes. Cathodoluminescence spectra reveal that CdS and CdSe nanotubes have profound emission peaks at ∼512 and ∼724nm. The luminescence intensities vary between Sn filled and unfilled tube parts. Keeping in mind that ZnS and ZnSe nanotubes may also be synthesized using the similar technique, we propose that the present method is a universal synthetic route toward single-crystalline IIB-VI group semiconductor nanotubes.
Solid–Solution Semiconductor Nanowires in Pseudobinary Systems
Publisher: American Chemical Society (ACS)
Date: 10-12-2012
DOI: 10.1021/NL303501T
Abstract: Pseudobinary solid-solution semiconductor nanowires made of (GaP)(1-x)(ZnS)(x), (ZnS)(1-x)(GaP)(x) and (GaN)(1-x)(ZnO)(x) were synthesized based on an elaborative compositional, structural, and synthetic designs. Using analytical high-resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS), we confirmed that the structure uniformity and a lattice match between the two constituting binary components play the key roles in the formation of quaternary solid-solution nanostructures. Electrical transport measurements on in idual GaP and (GaP)(1-x)(ZnS)(x) nanowires indicated that a slight invasion of ZnS in the GaP host could lead to the abrupt resistance increase, resulting in the semiconductor-to-insulator transition. The method proposed here may be extended to the rational synthesis of many other multicomponent nanosystems with tunable and intriguing optoelectronic properties for specific applications.
Efficient encapsulation of gaseous nitrogen inside carbon nanotubes with bamboo-like structure using aerosol thermolysis
Publisher: Elsevier BV
Date: 09-2004
Probing interfacial interactions and dynamics of polymers enclosed in boron nitride nanotubes
Publisher: Wiley
Date: 23-11-2021
DOI: 10.1002/POL.20210620
Abstract: Understanding interfacial interactions in polymer systems is crucial for their applicability for instance in adhesives and coatings. Enclosing polymers in a cylindrical volume provides a system for studying interactions dictated by a continuous interfacial layer and a bulk‐like volume in the middle of the cylinders. Here, we describe a simple method for enclosing polymers into boron nitride nanotubes (BNNTs) and establishing the effect of the interfacial interactions on the glass transition temperature ( T g ) of the polymers by infrared spectroscopy. The volume of the inner channel is large in comparison to the volume of the loaded polymer coils, allowing the polymer to expand along the inner channel, resulting in the effect of interfacial interactions on polymer dynamics dominating over confinement effects. As ex les, we loaded poly(4‐vinyl pyridine), poly(methyl methacrylate), poly(vinyl pyrrolidone), and poly(disperse red 1 acrylate) in BNNTs. The strongest interaction between the studied polymer and BNNTs was observed for poly(4‐vinyl pyridine), which also caused a significant increase of T g . In addition to characterizing the effect of interfacial interactions on the thermal transitions of the polymers, this method, which is generalizable to most soluble polymer materials, can be used for studying photoinduced transitions in photoactive polymers thanks to the transparency of the BNNTs at visible wavelengths.
New Boron Nitride Whiskers: Showing Strong Ultraviolet and Visible Light Luminescence
Publisher: American Chemical Society (ACS)
Date: 17-04-2004
DOI: 10.1021/JP035856F
Abstract: Boron nitride whiskers with a special structure have been synthesized by a thermal reaction process. The as-prepared BN whiskers have a length of tens of micrometers and a mean diameter of 500 nm. High-resolution TEM analysis shows that the as-prepared BN whiskers can be described as a nanofiber-interweaved network. Infrared and electron energy loss spectra reveal that the BN whiskers are composed of both sigma-sp2 and sigma-sp3 chemical bonds. The UV-vis absorption spectrum displays the energy band gap of the BN whiskers and multiple fine absorption peaks of the phonon-electron coupling. Both photoluminescence (PL) and cathodoluminescence (CL) measurements show the specially structured BN emits strong UV and visible luminescences, which is a promising material for deep-blue and UV applications.
Single-Crystalline Rutile TiO2 Hollow Spheres: Room-Temperature Synthesis, Tailored Visible-Light-Extinction, and Effective Scattering Layer for Quantum Dot-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 03-11-2011
DOI: 10.1021/JA2049463
Abstract: A general synthesis of inorganic single-crystalline hollow spheres has been achieved through a mechanism analogous to the Kirkendall effect, based on a simple one-step laser process performed at room temperature. Taking TiO(2) as an ex le, we describe the laser process by investigating the influence of experimental parameters, for ex le, laser wavelength, laser fluence/irradiation time, liquid medium, and concentration of starting materials, on the formation of hollow spheres. It was found that the size-tailored TiO(2) hollow spheres demonstrate tunable light scattering over a wide visible-light range. Inspired by the effect of light scattering, we introduced the TiO(2) hollow sphere's scattering layer in quantum dot-sensitized solar cells and achieved a current notable 10% improvement of solar-to-electric conversion efficiency, indicating that TiO(2) hollow spheres are potential candidates in optical and optoelectronic devices.
Self-sacrificial templated synthesis of a three-dimensional hierarchical macroporous honeycomb-like ZnO/ZnCo2O4 hybrid for carbon monoxide sensing
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA11380G
Abstract: A 3D macroporous honeycomb-like ZnO/ZnCo 2 O 4 hybrid for CO sensing is reported.
Comparative Studies on the Electrical and Mechanical Behavior of Catalytically Grown Multiwalled Carbon Nanotubes and Scrolled Graphene
Publisher: American Chemical Society (ACS)
Date: 20-07-2011
DOI: 10.1021/NL201655C
Abstract: The electrical and mechanical properties of multiwalled carbon nanotubes and of scrolled graphene structures, synthesized from iron-phthalocyanine in a catalytic chemical vapor deposition process, were investigated in situ in a transmission electron microscope. These experiments enabled us to get a more detailed quantitative picture of the peculiarities of the two different types of carbon nanostructures. The nanoscrolls showed superior conductance >10G(o), against ≤1G(o) of the nested tubes, and a much enhanced electric sustainability (∼10(8) A/cm(2)). While the pronounced nonlinear increase in current in the nested tube structure with increasing applied voltage is directly related to an increasing number of tubes involved, the electric breakdown has correspondingly been characterized by fractional ablation of the successive layers. Scrolls, on the contrary, do not show any fractional electric response. Mechanical bending has been found easier with scrolled graphenes than with nested tubes. This observation confirms the prediction of higher flexibility of the scroll structure in interesting phenomena like intercalation and electroactuation.
Multi-walled carbon nanotube papers as binder-free cathodes for large capacity and reversible non-aqueous Li–O2 batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA11792H
Thickness-Dependent Photocatalytic Performance of ZnO Nanoplatelets
Publisher: American Chemical Society (ACS)
Date: 14-07-2006
DOI: 10.1021/JP061874W
Abstract: In this paper, we report the large-scale synthesis of ZnO nanoplatelets as thin as 10 nm. The nanoplatelets show higher efficiency in photodegrading organic dyes than ZnO nanorods do, and for the nanoplatelets, the thinner they are, the higher the performance. The photocatalytic decomposition of organic dyes (eosin B) by ZnO nanoplatelets compares favorably to the performances of ZnS porous nanoparticles and commercial Degussa P25 titania particles. This finding may have significant implications in the environment remediation and the fabrication of functional nanodevices.
Preparation of aligned multi-walled BN and B/C/N nanotubular arrays and their characterization using HRTEM, EELS and energy-filtered TEM
Publisher: Elsevier BV
Date: 10-2002
Opto-mechano-electrical tripling in ZnO nanowires probed by photocurrent spectroscopy in a high-resolution transmission electron microscope
Publisher: AIP Publishing
Date: 31-08-2015
DOI: 10.1063/1.4929812
Abstract: Photocurrent spectroscopy of in idual free-standing ZnO nanowires inside a high-resolution transmission electron microscope (TEM) is reported. By using specially designed optical in situ TEM system capable of scanning tunneling microscopy probing paired with light illumination, opto-mechano-electrical tripling phenomenon in ZnO nanowires is demonstrated. Splitting of photocurrent spectra at around 3.3 eV under in situ TEM bending of ZnO nanowires directly corresponds to nanowire deformation and appearance of expanded and compressed nanowire sides. Theoretical simulation of a bent ZnO nanowire has an excellent agreement with the experimental data. The splitting effect could be explained by a change in the valence band structure of ZnO nanowires due to a lattice strain. The strain-induced splitting provides important clues for future flexible piezo-phototronics.
Nanostructured polymeric yolk–shell capsules: a versatile tool for hierarchical nanocatalyst design
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA03311C
Abstract: All polymeric yolk–shell nanocapsules offer tunable platforms for nanostructured catalyst design including hierarchical architectures, allowing the on-demand synthesis of catalysts.
Ultrafine ZnS Nanobelts as Field Emitters
Publisher: Wiley
Date: 17-09-2007
Gold‐Loaded Nanoporous Iron Oxide Cubes Derived from Prussian Blue as Carbon Monoxide Oxidation Catalyst at Room Temperature
Publisher: Wiley
Date: 18-12-2018
SiC–SiO2–C Coaxial Nanocables and Chains of Carbon Nanotube–SiC Heterojunctions
Publisher: Wiley
Date: 05-01-2004
Cake resistance and solute rejection in bacterial microfiltration: The role of the extracellular matrix
Publisher: Elsevier BV
Date: 26-04-1993
Boron-doped carbon fullerenes and nanotubules formed through electron irradiation-induced solid-state phase transformation
Publisher: AIP Publishing
Date: 27-04-1998
DOI: 10.1063/1.121291
Abstract: Here we report on the in situ creation of single/multi-shelled fullerenes and multi-walled nanotubules by electron irradiation of chemical vapor deposit graphitic BxC1−x (x⩽0.2) in a high-resolution 300 kV electron microscope. Nanostructure formation occurred through irradiation-induced solid-state phase transformation, in contrast to conventional fullerene/nanotube synthesis from the gas phase. The fullerene/nanotubule chemical composition and bonding character were analyzed by electron energy loss spectroscopy applying a ∅0.5 nm electron probe. The B/C ratio of the observed curled, closed nanostructures has never exceeded ∼0.1. Unlike pure carbon “onions,” most of the B-doped fullerenes exhibited a polyhedral faceted circumference suggestive of B-induced buckling.
Tunable Mechanical and Electrical Properties of Coaxial BN-C Nanotubes
Publisher: Wiley
Date: 30-11-2019
Post-Synthesis Carbon Doping of Individual Multiwalled Boron Nitride Nanotubes via Electron-Beam Irradiation
Publisher: American Chemical Society (ACS)
Date: 13-09-2010
DOI: 10.1021/JA106134S
Abstract: We report on post-synthesis carbon doping of in idual boron nitride nanotubes (BNNTs) via in situ electron-beam irradiation inside an energy-filtering 300 keV high-resolution transmission electron microscope. The substitution of C for B and N atoms in the honeycomb lattice was demonstrated through electron energy loss spectroscopy, spatially resolved energy-filtered elemental mapping, and in situ electrical measurements. Substitutional C doping transformed BNNTs from electrical insulators to conductors. In comparison with the existing post-synthesis doping methods for nanoscale materials (e.g., ion implantation and diffusion), the discovered electron-beam-induced doping is a well-controlled, little-damaging, room-temperature, and simple strategy that is expected to demonstrate great promise for post-synthesis doping of erse nanomaterials in the future.
Water resources and the potential of brackish groundwater extraction in Egypt: A review
Publisher: IWA Publishing
Date: 21-02-2014
Nanoscale Oxygen Generators: MgO2-Based Fillings of BN Nanotubes
Publisher: American Chemical Society (ACS)
Date: 08-2003
DOI: 10.1021/JP030383Y
Pearl-Like ZnS-Decorated InP Nanowire Heterostructures and Their Electric Behaviors
Publisher: American Chemical Society (ACS)
Date: 15-10-2008
DOI: 10.1021/CM802042K
352 nm ultraviolet emission from high-quality crystalline AlN whiskers
Publisher: IOP Publishing
Date: 21-01-2010
DOI: 10.1088/0957-4484/21/7/075708
Abstract: High-quality, crystalline AlN whiskers with large yield have been synthesized through the direct nitridation of Al vapor at high temperature. The AlN whiskers exhibited a strong and uniform ultraviolet emission at approximately 352 nm, which is notably shorter compared with the wavelength of previously reported one-dimensional AlN nanostructures. Energy filtered transmission electron microscope (TEM) analyses indicated that nitrogen deficiency and rather lower oxygen content in the AlN lattice might be responsible for the strong 352 nm ultraviolet emission.
Self-Assembly of Two-Dimensional Bimetallic Nickel–Cobalt Phosphate Nanoplates into One-Dimensional Porous Chainlike Architecture for Efficient Oxygen Evolution Reaction
Publisher: American Chemical Society (ACS)
Date: 17-07-2020
Efficient disentanglement of boron nitride nanotubes using water-soluble polysaccharides for protein immobilization
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2RA20765F
Manganese Doping in Cobalt Oxide Nanorods Promotes Catalytic Dehydrogenation
Publisher: American Chemical Society (ACS)
Date: 02-03-2020
Template-free synthesis on single-crystalline InP nanotubes
Publisher: AIP Publishing
Date: 25-10-2004
DOI: 10.1063/1.1812596
Abstract: A simple template-free thermal chemical route has been developed to prepare InP nanotubes with zinc blende structure by controlling the reaction temperature and flowing gas. The synthesized InP nanotubes are single-crystalline, free from defects and dislocations, and partially filled with In. The presence of metallic indium at tips of and within the synthesized InP nanotubes indicated a vapor–liquid–solid mechanism for the formation of InP nanotubes. The synthesized InP single-crystalline nanotubes grew along [1¯10] direction. The synthesized InP nanotubes have a uniform outer diameter of 50–60 nm and a wall thickness of 7–10 nm. The photoluminescence spectrum at room temperature exhibits a great shift from the bulk band gap of 1.35 eV to high energy of 1.49 eV.
The tubular conical helix of graphitic boron nitride
Publisher: IOP Publishing
Date: 30-09-2003
International workshop on advancing methods to overcome challenges associated with life history and stock assessments of data-poor deep-water snappers and groupers
Publisher: Elsevier BV
Date: 05-2017
Electronic and Optical Properties of 2D Materials Constructed from Light Atoms
Publisher: Wiley
Date: 07-08-2018
Abstract: Boron, carbon, nitrogen, and oxygen atoms can form various building blocks for further construction of structurally well-defined 2D materials (2DMs). Both in theory and experiment, it has been documented that the electronic structures and optical properties of 2DMs are well tunable through a rational design of the material structure. Here, the recent progress on 2DMs that are composed of B, C, N, and O elements is introduced, including borophene, graphene, h-BN, g-C
Electrochemical Deposition of ZnO Nanowire Arrays: Organization, Doping, and Properties
Publisher: American Scientific Publishers
Date: 09-2010
One-Dimensional Nanostructures in Porous Anodic Alumina Membranes
Publisher: American Scientific Publishers
Date: 09-2010
A numerical approach to module design for crossflow vacuum membrane distillation systems
Publisher: Elsevier BV
Date: 07-2016
ZnO nanoneedles with tip surface perturbations: Excellent field emitters
Publisher: AIP Publishing
Date: 20-04-2004
DOI: 10.1063/1.1738174
Abstract: ZnO nanoneedles were prepared on a silicon wafer through a chemical vapor deposition. The diameters of the needle tips were in a range of 20–50 nm. High-resolution transmission electron microscopy revealed that the nanoneedles were single crystals growing along the [001] direction and exhibiting multiple tip surface perturbations, just 1–3 nm in dimension. Field-emission measurements on the prepared nanostructures showed fairly low turn-on and threshold fields of 2.5 and 4.0 V/μm, respectively. The nanosize perturbations on the nanoneedle tips are assumed to cause such excellent field-emission performance.
Pure and doped boron nitride nanotubes
Publisher: Elsevier BV
Date: 05-2007
Heteroepitaxial Growth of Orientation-Ordered ZnS Nanowire Arrays
Publisher: American Chemical Society (ACS)
Date: 19-07-2008
DOI: 10.1021/JP8039687
Towards new opportunities for reuse, recycling and disposal of used reverse osmosis membranes
Publisher: Elsevier BV
Date: 08-2012
Superstrong low-resistant carbon nanotube-carbide-metal nanocontacts
Publisher: Wiley
Date: 07-10-2010
Electric-field-direction dependent spatial distribution of electron emission along electrically biased carbon nanotubes
Publisher: American Physical Society (APS)
Date: 28-11-2011
Field emission from MoO3 nanobelts
Publisher: AIP Publishing
Date: 17-12-2002
DOI: 10.1063/1.1532104
Abstract: Single-crystalline MoO3 nanobelts having an orthorhombic structure were prepared on a Si wafer via heating a Mo foil in air. The nanobelts were 50–300 nm wide and tens of nanometers thick. The nanobelt lengths lie in the [001] direction. Field-emission measurements showed that the threshold field decreased with the anode–s le separation increasing. Typically, a threshold field of 12.9 V/μm was determined at a spacing of 80 μm. The nanobelts exhibited a sharp increase in emission current density near the threshold field and, thus, reached a high current density at a relatively low field. Emission from both sharp corners and edges of the nanobelts is assumed to contribute to the high emission current. The high-current emission paired with high stability indicates that the prepared MoO3 nanobelt films are excellent field emitters.
Co3O4 nanocages with highly exposed {110} facets for high-performance lithium storage
Publisher: Springer Science and Business Media LLC
Date: 02-09-2013
DOI: 10.1038/SREP02543
Multiangular Branched ZnS Nanostructures with Needle-Shaped Tips: Potential Luminescent and Field-Emitter Nanomaterial
Publisher: American Chemical Society (ACS)
Date: 03-2008
DOI: 10.1021/JP711498M
ChemInform Abstract: Nano Boron Nitride Flatland
Publisher: Wiley
Date: 03-04-2014
One-dimensional surface phonon polaritons in boron nitride nanotubes
Publisher: Springer Science and Business Media LLC
Date: 26-08-2014
DOI: 10.1038/NCOMMS5782
Abstract: Surface polaritons, which are electromagnetic waves coupled to material charge oscillations, have enabled applications in concentrating, guiding and harvesting optical energy below the diffraction limit. Surface plasmon polaritons involve oscillations of electrons and are accessible in noble metals at visible and near-infrared wavelengths, whereas surface phonon polaritons (SPhPs) rely on phonon resonances in polar materials, and are active in the mid-infrared. Noble metal surface plasmon polaritons have limited applications in the mid-infrared. SPhPs at flat interfaces normally possess long polariton wavelengths and provide modest field confinement/enhancement. Here we demonstrate propagating SPhPs in a one-dimensional material consisting of a boron nitride nanotube at mid-infrared wavelengths. The observed SPhP exhibits high field confinement and enhancement, and a very high effective index (neff~70). We show that the modal and propagation length characteristics of the SPhPs may be controlled through the nanotube size and the supporting substrates, enabling mid-infrared applications.
Intercrystalline distal-effect on the afterglow phenomenon in photoluminescent SrAl2O4:Ce(III), Ln nanotube growth
Publisher: IOP Publishing
Date: 21-07-2010
DOI: 10.1088/0957-4484/21/32/325707
Abstract: We report a new method for the synthesis of photoluminescent SrAl(2)O(4):Ce(3+), Dy(3+), Eu(2+) nanotubes, PL-SNT:Ce(III), Ln, using solid-state reaction and post-annealing approach. This new optical nanotubular structure was characterized by HRTEM, SEM, AFM, EDX, steady-state and time-resolved PL spectroscopy. A series of f-f and f-d-transitions with light emission in structured bands peaking at 488 nm arising from the polymorphism of the host lattice was correlated with an intercrystalline distal-effect on the afterglow phenomenon.
ZnO low-dimensional structures: electrical properties measured inside a transmission electron microscope
Publisher: Springer Science and Business Media LLC
Date: 12-12-2007
Chemical Peeling and Branching of Boron Nitride Nanotubes in Dimethyl Sulfoxide
Publisher: Wiley
Date: 13-03-2006
Transition-Metal-Free, Pure p-Block Alloy Electrocatalysts for the Highly Efficient Nitrate Reduction to Ammonia
Publisher: No publisher found
Date: 2023
Sandwich-Structured Ordered Mesoporous Polydopamine/MXene Hybrids as High-Performance Anodes for Lithium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 18-03-2020
Prospective important semiconducting nanotubes: synthesis, properties and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B900521H
Enhancement of reverse osmosis water recovery using interstage calcium precipitation
Publisher: Elsevier BV
Date: 06-2012
One-dimensional CdS nanostructures: synthesis, properties, and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B9NR00415G
Abstract: One-dimensional (1D) semiconductor nanostructures are of prime interest due to their potential in investigating the size and dimensionality dependence of the materials' physical properties and constructing nanoscale electronic and optoelectronic devices. Cadmium sulfide (CdS) is an important semiconductor compound of the II-VI group, and its synthesis and properties have been of growing interest owing to prominent applications in several fields. This article provides a comprehensive review of the state-of-the-art research activities that focus on the rational synthesis, novel properties and unique applications of 1D CdS nanostructures in nanotechnology. It begins with the rational design and synthesis of 1D CdS nanostructures, and then highlights a range of unique properties and applications (e.g. photoluminescence, cathodoluminescence, electrochemiluminescence, photocatalysis, lasers, waveguides, modulators, solar cells, field-effect transistors, photodetectors, field-emitters, and nanogenerators) associated with them. Finally, the review is concluded with the author outlook of the perspectives with respect to future research on 1D CdS nanostructures.
Synthesis and Structures of High-Quality Single-Crystalline II3−V2 Semiconductors Nanobelts
Publisher: American Chemical Society (ACS)
Date: 09-03-2007
DOI: 10.1021/JP068792S
Discrimination of B–C–N nanotubes through energy-filtering electron microscopy
Publisher: Elsevier BV
Date: 11-2005
Performance of a membrane-based irrigation system for different evaporative conditions
Publisher: American Society of Agricultural and Biological Engineers
Date: 17-07-2016
Anisotropy of two-dimensional materials under tension: A molecular dynamic study across graphene, hexagonal boron nitride and molybdenum disulphide
Publisher: Elsevier BV
Date: 11-2022
Controllable Modification of SiC Nanowires Encapsulated in BN Nanotubes
Publisher: Wiley
Date: 08-03-2005
Role of Dimethyl Sulfoxide in the Hydrolytic Peeling of Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 11-08-2009
DOI: 10.1021/JP905240Q
Development of Nanoscale Thermocouple Probes for Local Thermal Measurements
Publisher: Surface Science Society Japan
Date: 08-08-2019
Degradation of 1,4-dioxane in water using TiO2 based photocatalytic and H2O2/UV processes
Publisher: Elsevier BV
Date: 07-2007
DOI: 10.1016/J.JHAZMAT.2007.04.049
Abstract: 1,4-dioxane is a synthetic compound found in industrial effluent and subsequently contaminates water bodies due to its high solubility and high volatility. It is of concern due to its toxic and hazardous nature and has been listed as a class 2B carcinogen. This study involved optimisation of the photocatalytic and H(2)O(2)/UVC processes for 1,4-dioxane removal. Different photocatalysts and loadings were investigated for the degradation of low concentrations of 1,4-dioxane in water including a commercial P25, a synthesised magnetic photocatalyst and an immobilised sol-gel system. A commercial catalyst (Degussa P25) was the most efficient. A lifetime study of the sol-gel reactor showed that the coating was stable over the time period studied. The optimum H(2)O(2) concentration in the H(2)O(2)/UVC process was found to be 30ppm. The addition of H(2)O(2) to the photocatalytic process for 1,4-dioxane removal caused a decrease in rate for the commercial P25 photocatalyst and an increase in rate for the lab-made magnetic photocatalyst.
Publisher's Note: Engineering of electronic structure of boron-nitride nanotubes by covalent functionalization [Phys. Rev. B74, 153413 (2006)]
Publisher: American Physical Society (APS)
Date: 07-11-2006
Liquid Gallium Columns Sheathed with Carbon: Bulk Synthesis and Manipulation
Publisher: American Chemical Society (ACS)
Date: 21-05-2005
DOI: 10.1021/JP050826T
Abstract: It is impossible to fabricate isolated gallium nanomaterials due to the low melting point of Ga (29.8 degrees C) and its high reactivity. We report the bulk synthesis of uniform liquid Ga columns encapsulated into carbon nanotubes through high-temperature chemical reaction between Ga and CH4. The diameter of filled Ga liquid columns is approximately 25 nm, and their length is up to several micrometers. The thickness of the carbon sheaths is approximately 6 nm. Simultaneous condensation of a Ga vapor and carbon clusters results in the generation of Ga-filled carbon nanotubes. A convergent 300 kV electron beam generated in a field emission high-resolution electron microscope is demonstrated to be a powerful tool for delicate manipulation of the liquid Ga nanocolumns: they can be gently joined, cut, and sealed within carbon nanotubes. The self-organization of a carbon sheath during the electron-beam irradiation is discussed. The electron-beam irradiation may also become a decent tool for Ga-filled carbon nanotube thermometer calibration.
Iron phthalocyanine derived Fe1/h-BN single atom catalysts for CO2 hydrogenation
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3TA00356F
Abstract: Fe 1 /h-BN single atom catalysts can be successfully synthesized using heat treatment of Fe phthalocyanine decorated h-BN in an oxygen atmosphere. Selectivity toward hydrocarbons can be controlled by the presence of Fe nanoparticles.
Enhanced Field Emission Performance of Ga-Doped In2O3(ZnO)3 Superlattice Nanobelts
Publisher: American Chemical Society (ACS)
Date: 22-11-2011
DOI: 10.1021/JP207438S
Cobalt Nanoparticle-Assisted Engineering of Multiwall Carbon Nanotubes
Publisher: American Chemical Society (ACS)
Date: 13-08-2009
DOI: 10.1021/NN900634F
Abstract: New methods of processing multiwall carbon nanotubes (CNTs) are demonstrated in experiments in the transmission electron microscope (TEM). These include precisely controllable cutting, repairing, and interconnecting of different CNTs with the assistance of an encapsulated Co particle. All processes involve the interactions between the metal and graphitic shells that are driven by combined electrical biasing [using a scanning-tunneling microscope (STM)-TEM setup] of the CNT and focused electron-beam irradiation of a Co-containing region. In particular, we present two CNT soldering processes, that is, Co-joined and Co-catalytic connections. The former process uses a Co particle as the central node to which two CNTs are covalently attached on the opposite sides, and the latter makes use of the segregation of new graphitic shells from the metal at the connecting site, resulting in CNT plumbing. We compare the mechanical robustness of both connection types by direct force measurements in the TEM using an integrated atomic force microscope (AFM) setup. They reveal a tensile strength of 4.2 and 31 GPa, respectively, thus demonstrating the superiority of the Co-catalytic connection whose strength is already comparable to standard CNTs. In addition, all connected nanotubes show metallic conduction. The developed methods could be of particular importance in future nanoelectronic device technology.
The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review
Publisher: MDPI AG
Date: 28-07-2017
DOI: 10.3390/APP7080765
Supercapacitive energy storage performance of molybdenum disulfide nanosheets wrapped with microporous carbons
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4TA06303A
Abstract: A structure composed of a pseudocapacitive core (MoS 2 nanosheets) and an electrostatic double-layer capacitive porous shell (MOF-derived microporous carbons) was developed for advanced electrochemical energy storage.
Influence of fuel-oxygen content on morphology and nanostructure of soot particles
Publisher: Elsevier BV
Date: 07-2019
In situ electrochemical formation of core–shell nickel–iron disulfide and oxyhydroxide heterostructured catalysts for a stable oxygen evolution reaction and the associated mechanisms
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6TA09366C
Abstract: A novel Ni–Fe disulfide@oxyhydroxide core–shell heterostructure exhibits excellent electrochemical catalytic stability and activity for the oxygen evolution reaction (OER).
Cross‐Bar SnO2‐NiO Nanofiber‐Array‐Based Transparent Photodetectors with High Detectivity
Publisher: Wiley
Date: 22-11-2019
New Crystalline Phase Induced by Boron Nitride Nanotubes in Polyaniline
Publisher: American Chemical Society (ACS)
Date: 18-10-2008
DOI: 10.1021/JP807443Y
Formation of nanoclusters in expanding laser plume
Publisher: World Scientific Pub Co Pte Lt
Date: 08-2010
DOI: 10.1142/S0219581X10006983
Abstract: Formation of carbon nanoclusters in a laser-pulse created plume expanding in vacuum and in a noble gas environment at various pressures was studied. Experiments were performed with carbon nanoclusters formed by laser ablation of graphite targets with 12-picosecond 532 nm laser pulses at MHz-range repetition rate in a broad range of ambient He , Ar , Kr , and Xe gas pressures from 2 × 10 -2 Torr to 1500 Torr. The experimental results confirmed our theoretical prediction that the average size of the nanoparticles depends weakly on the type of the ambient gas, and is determined exclusively by the single-laser pulse parameters. The most important finding relates to the fact that in vacuum the cluster size is mainly determined by hydrodynamic expansion of the plume, while in the ambient gas it is controlled by atomic diffusion in the gas.
High‐Performance Blue/Ultraviolet‐Light‐Sensitive ZnSe‐Nanobelt Photodetectors
Publisher: Wiley
Date: 21-12-2009
Abstract: Single-crystalline zinc selenide (ZnSe) nanobelts were fabricated via the ethylenediamine (en)-assisted ternary solution technique and subsequent thermal treatment. In idual ZnSe nanobelts were assembled into nanoscale devices, showing a high spectral selectivity and photocurrent/immediate-decay ratio and a fast time response, justifying effective utilization of the ZnSe nanobelts as blue/UV-light-sensitive photodetectors.
Interfacial Engineering with Liquid Metal for Si-Based Hybrid Electrodes in Lithium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 06-2020
Atomistic Origins of High Rate Capability and Capacity of N-Doped Graphene for Lithium Storage
Publisher: American Chemical Society (ACS)
Date: 05-02-2014
DOI: 10.1021/NL4038592
Abstract: Distinct from pure graphene, N-doped graphene (GN) has been found to possess high rate capability and capacity for lithium storage. However, there has still been a lack of direct experimental evidence and fundamental understanding of the storage mechanisms at the atomic scale, which may shed a new light on the reasons of the ultrafast lithium storage property and high capacity for GN. Here we report on the atomistic insights of the GN energy storage as revealed by in situ transmission electron microscopy (TEM). The lithiation process on edges and basal planes is directly visualized, the pyrrolic N "hole" defect and the perturbed solid-electrolyte-interface configurations are observed, and charge transfer states for three N-existing forms are also investigated. In situ high-resolution TEM experiments together with theoretical calculations provide a solid evidence that enlarged edge {0002} spacings and surface hole defects result in improved surface capacitive effects and thus high rate capability and the high capacity are owing to short-distance orderings at the edges during discharging and numerous surface defects the phenomena cannot be understood previously by standard electron or X-ray diffraction analyses.
Particle deposition on flat sheet membranes under bubbly and slug flow aeration in coagulation-microfiltration process: Effects of particle characteristic and shear stress
Publisher: Elsevier BV
Date: 11-2017
Photoswitchable block copolymers based on main chain α-bisimines
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2PY00994C
Abstract: We introduce linear diblock copolymers (BCPs) consisting of readily accessable and photoswitchable α-bisimine units in the polymer backbone.
Excellent Field-Emission Properties of P-Doped GaN Nanowires
Publisher: American Chemical Society (ACS)
Date: 21-10-2005
DOI: 10.1021/JP052351B
Abstract: GaN nanowires with P doping were synthesized via a simple thermal evaporation process. The P-doped GaN nanowires have average diameters of approximately 100 nm and lengths up to tens of micrometers. Scanning electron microscope and high-resolution field-emission transmission electron microscope analyses revealed that P doping results in a rough surface morphology of GaN nanowires. Field-emission measurements showed that P doping effectively decreases the turn-on field of GaN nanowire to 5.1 V/mum, holding promise of application as an electron emitter. The rough surface is responsible for enhancement of the field-emission properties of GaN nanowires.
IN-SITU TEM OF FILLED NANOTUBES: HEATING, ELECTRON IRRADIATION, ELECTRICAL AND MECHANICAL PROBING
Publisher: WORLD SCIENTIFIC
Date: 07-2008
Graphene Ingestion and Regrowth on “Carbon-Starved” Metal Electrodes
Publisher: American Chemical Society (ACS)
Date: 29-09-2017
Abstract: The interaction between graphene and various metals plays a central role in future carbon-based device and synthesis technologies. Herein, three different types of metal nanoelectrodes (W, Ni, Au) were employed to in situ study the graphene-metal interfacial kinetic behaviors in a high-resolution transmission electron microscope. The three metals exhibit distinctly different interactions with graphene when driven by a heating current. Tungsten tips, the most carbon-starved ones, can ingest a graphene sheet continuously nickel tips, less carbon starved, typically "eat" graphene only by taking a "bite" from its edge gold, however, is nonactive with graphene at all, even in its molten state. The ingested graphene atoms finally precipitate as freshly formed graphitic shells encapsulating the catalytic W and Ni electrodes. Particularly, we propose a periodic extension/thickening graphene growth scenario by atomic-scale observation of this process on W electrodes, where the propagation of the underlying tungsten carbide (WC) dominates the growth dynamics. This work uncovers the complexity of carbon diffusion/segregation processes at different graphene/metal interfaces that would severely degrade the device performance and stability. Besides, it also provides a detailed and insightful understanding of the sp
Nanophotonic Switch: Gold-in-Ga2O3 Peapod Nanowires
Publisher: American Chemical Society (ACS)
Date: 17-04-2008
DOI: 10.1021/NL0731567
Abstract: A novel metal-insulator heterostructure made of twinned Ga2O3 nanowires embedding discrete gold particles along the twin boundary was formed through a reaction between gold, gallium, and silica at 800 degrees C during simple thermal annealing. The Au-in-Ga2O3 peapods spontaneously crystallized under phase separation induced by the formation of twin boundaries. The nanostructures were analyzed by field emission scanning (FESEM) and transmission electron microscopes (FETEM), and their photoresponse was investigated using a double-frequency Nd:YAG laser with a wavelength of 532 nm on a designed single-nanowire device. The surface plasmon resonance (SPR) effects of embedded Au nanoparticles are proposed to be responsible for the remarkable photoresponse of these novel structures.
In Situ Electrochemistry of Rechargeable Battery Materials: Status Report and Perspectives
Publisher: Wiley
Date: 19-06-2017
Abstract: The development of rechargeable batteries with high performance is considered to be a feasible way to satisfy the increasing needs of electric vehicles and portable devices. It is of vital importance to design electrodes with high electrochemical performance and to understand the nature of the electrode/electrolyte interfaces during battery operation, which allows a direct observation of the complicated chemical and physical processes within the electrodes and electrolyte, and thus provides real‐time information for further design and optimization of the battery performance. Here, the recent progress in in situ techniques employed for the investigations of material structural evolutions is described, including characterization using neutrons, X‐ray diffraction, and nuclear magnetic resonance. In situ techniques utilized for in‐depth uncovering the electrode/electrolyte phase/interface change mechanisms are then highlighted, including transmission electron microscopy, atomic force microscopy, X‐ray spectroscopy, and Raman spectroscopy. The real‐time monitoring of lithium dendrite growth and in situ detection of gas evolution during charge/discharge processes are also discussed. Finally, the major challenges and opportunities of in situ characterization techniques are outlined toward new developments of rechargeable batteries, including innovation in the design of compatible in situ cells, applications of dynamic analysis, and in situ electrochemistry under multi‐stimuli. A clear and in‐depth understanding of in situ technique applications and the mechanisms of structural evolutions, surface/interface changes, and gas generations within rechargeable batteries is given here.
Optoelectronic and Optomechanical Properties of Few‐Atomic‐Layer Black Phosphorus Nanoflakes as Revealed by In Situ TEM
Publisher: Wiley
Date: 18-05-2023
Abstract: The optoelectronic signatures of free‐standing few‐atomic‐layer black phosphorus nanoflakes are analyzed by in situ transmission electron microscopy (TEM). As compared to other 2D materials, the band gap of black phosphorus (BP) is related directly to multiple thicknesses and can be tuned by nanoflake thickness and strain. The photocurrent measurements with the TEM show a stable response to infrared light illumination and change of nanoflakes band gap with deformation while pressing them between two electrodes assembled in the microscope. The photocurrent spectra of an 8‐ and a 6‐layer BP nanoflake s les are comparatively measured. Density functional theory (DFT) calculations are performed to identify the band structure changes of BP during deformations. The results should help to find the best pathways for BP smart band gap engineering via tuning the number of material atomic layers and programmed deformations to promote future optoelectronic applications.
Synthesis and photoluminescence of amorphous silicon nitride/silica coaxial nanotubes
Publisher: Elsevier BV
Date: 07-2004
Plasma-Assisted Interface Engineering of Boron Nitride Nanostructure Films
Publisher: American Chemical Society (ACS)
Date: 09-10-2014
DOI: 10.1021/NN5041729
Abstract: Today many aspects of science and technology are progressing into the nanoscale realm where surfaces and interfaces are intrinsically important in determining properties and performances of materials and devices. One familiar phenomenon in which interfacial interactions play a major role is the wetting of solids. In this work we use a facile one-step plasma method to control the wettability of boron nitride (BN) nanostructure films via covalent chemical functionalization, while their surface morphology remains intact. By tailoring the concentration of grafted hydroxyl groups, superhydrophilic, hydrophilic, and hydrophobic patterns are created on the initially superhydrophobic BN nanosheet and nanotube films. Moreover, by introducing a gradient of the functional groups, directional liquid spreading toward increasing [OH] content is achieved on the films. The resulting insights are meant to illustrate great potentials of this method to tailor wettability of ceramic films, control liquid flow patterns for engineering applications such as microfluidics and biosensing, and improve the interfacial contact and adhesion in nanocomposite materials.
Probing electrochemical reactivity in an Sb2S3-containing potassium-ion battery anode: observation of an increased capacity
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA03555F
Abstract: Sb 2 S 3 –rGO potassium-ion battery anode material is synthesised by the peroxide route and is evaluated in two non-aqueous electrolytes.
Boron nitride nanotubes as drug carriers
Publisher: Elsevier
Date: 2016
Boron nitride nanotubes functionalized with mesoporous silica for intracellular delivery of chemotherapy drugs
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC42743A
Abstract: Boron nitride nanotube (BNNT)@mesoporous silica hybrids with controllable surface zeta potential were fabricated for intracellular delivery of doxorubicin. The materials showed higher suspension ability, doxorubicin intracellular endocytosis efficiency, and LNcap prostate cancer cell killing ability compared with naked BNNTs.
Structural Changes of BN Nanotubes Irradiated by Al Ions
Publisher: American Scientific Publishers
Date: 06-2012
Uniform, thin and continuous graphitic carbon tubular coatings on CdS nanowires
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B814674H
Fabrication of metal-semiconductor nanowire heterojunctions
Publisher: Wiley
Date: 22-03-2005
Hexagonal BN- and BNO-supported Au and Pt nanocatalysts in carbon monoxide oxidation and carbon dioxide hydrogenation reactions
Publisher: Elsevier BV
Date: 04-2022
Crystallography and elasticity of individual GaN nanotubes
Publisher: IOP Publishing
Date: 15-04-2009
DOI: 10.1088/0957-4484/20/18/185705
Abstract: High-purity, crystalline [001]-oriented GaN nanotubes with outer diameters of 200 nm or more, rough surfaces and irregular internal channels were synthesized under epitaxial growth on [001]-oriented sapphire substrates. Elastic property measurements on free-standing in idual GaN nanotubes, using the in situ transmission electron microscopy (TEM) electromechanical resonance technique, pointed at an average Young's modulus E of 37 GPa and minimum quality factor of 320. These numbers are notably lower than those for previously reported GaN nanowires. The crystallography and chemistry of the GaN nanotubes were analyzed using TEM and energy dispersion x-ray spectroscopy (EDS). It is suggested that the lowered Young's modulus and quality factor of the nanotubes are mainly due to the surface roughness and defectiveness.
Boron Nitride Nanotube, Nanocable and Nanocone
Publisher: Springer Science and Business Media LLC
Date: 2001
Abstract: Boron nitride nanotubes, nanocones and nanocables were prepared and their atomic structures were identified by using a 300 kV field emission transmission electron microscope equipped with an electron energy loss spectrometer and energy dispersion X-ray detector. Multiwalled BN nanotubes and nanocones were synthesized by reacting C nanotube templates and boron oxide under nitrogen atmosphere at 1723-2023 K. Additions of metal oxide promoters, e.g. MoO 3 , CuO, and PbO, significantly improved BN-rich nanotube yield at the expense of B-C-N nanotubes. It was shown that BN nanotubes had preferential “zigzag” chirality and exhibited either hexagonal or rhombohedral stacking between shells. An efficient synthetic route for bulk quantities of BN tube production was also developed, where a B-N-O precursor was used during a CVD process. Nanocones of BN were mostly found to have 240° disclinations which ensure the presence of B-N bonds only. One case was observed of a cone constituted of 300° disclination implying that structures may contain line defects of non B-N bonds. The first synthesis of insulating BN nanocables was carried out, where BN nanotubes were entirely filled with Invar Fe-Ni nanorods. The filled nanotube diameters ranged between 30 to 300 nm, whereas the length of filling reached several microns.
Transforming 'value engineering' froman art form into a science - Process resilience modelling
Publisher: IWA Publishing
Date: 03-2014
DOI: 10.2166/WPT.2014.012
Abstract: The resilience of a treatment facility should be an important part of its design and operation throughout its service life to ensure it meets compliance and production expectations. This has traditionally been difficult to assess and quantify, and as a consequence its management has largely been ignored, or has been reduced to a function of how many treatment stages are provided with redundancy and/ or backup ‘stand-by’ facilities. Without proper resilience assessment there will always be a tendency to undertake ‘gold-plate’ engineering producing specifications much higher than the business need. This consequently leads to higher capital and operational expenditure over the life of a treatment asset. Value engineering then ends up an art form, where negotiating the line between risk and cost is often more to do with good luck than judgement. Resilience assessment makes value engineering a science rather than an art, as well as providing a critical means of influencing and assessing investment decisions and operational and maintenance planning to minimise the overall cost of compliance. Asset resilience assessment techniques have been developed in other industries over the last 15 years. Recently the authors have applied these tried and tested approaches to water and wastewater treatment assets.
Few-atomic-layered hexagonal boron nitride: CVD growth, characterization, and applications
Publisher: Elsevier BV
Date: 12-2017
BN/Ag hybrid nanomaterials with petal-like surfaces as catalysts and antibacterial agents
Publisher: Beilstein Institut
Date: 23-01-2018
DOI: 10.3762/BJNANO.9.27
Abstract: BN/Ag hybrid nanomaterials (HNMs) and their possible applications as novel active catalysts and antibacterial agents are investigated. BN/Ag nanoparticle (NP) hybrids were fabricated using two methods: (i) chemical vapour deposition (CVD) of BN NPs in the presence of Ag vapours, and (ii) ultraviolet (UV) decomposition of AgNO 3 in a suspension of BN NPs. The hybrid microstructures were studied by high-resolution transmission electron microscopy (HRTEM), high-angular dark field scanning TEM imaging paired with energy dispersion X-ray (EDX) mapping, X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (FTIR). They were also characterized in terms of thermal stability, Ag + ion release, catalytic and antibacterial activities. The materials synthesized via UV decomposition of AgNO 3 demonstrated a much better catalytic activity in comparison to those prepared using the CVD method. The best catalytic characteristics (100% methanol conversion at 350 °C) were achieved using the UV BN/Ag HNMs without preliminary annealing at 600 °C in an oxidizing atmosphere. Both types of the BN/Ag HNMs possess a profound antibacterial effect against Escherichia coli K-261 bacteria.
Single‐Crystalline Sb2Se3 Nanowires for High‐Performance Field Emitters and Photodetectors
Publisher: Wiley
Date: 10-09-2010
Boron nitride nanotubes/polystyrene composites
Publisher: Springer Science and Business Media LLC
Date: 11-2006
Abstract: Boron nitride nanotube (BNNT) olystyrene (PS) composite films were fabricated for the first time using high-quality BNNTs synthesized via a chemical-vapor-deposition method. The composite films exhibited good transparency. Tensile tests indicated that the elastic modulus of the films was increased by ∼21% when a ∼1 wt% soluble BNNT fraction was in use. Dispersion of BNNTs in PS and interfacial interactions between them were investigated using transmission electron microscopy. The film thermal properties, such as stability to oxidation and glass transition temperatures were measured. The experimental results and simple theoretical estimates indicate that BNNTs is a promising additive material for polymeric composites.
Amorphization and Directional Crystallization of Metals Confined in Carbon Nanotubes Investigated by in Situ Transmission Electron Microscopy
Publisher: American Chemical Society (ACS)
Date: 06-07-2015
DOI: 10.1021/ACS.NANOLETT.5B00664
Abstract: The hollow core of a carbon nanotube (CNT) provides a unique opportunity to explore the physics, chemistry, biology, and metallurgy of different materials confined in such nanospace. Here, we investigate the nonequilibrium metallurgical processes taking place inside CNTs by in situ transmission electron microscopy using CNTs as nanoscale resistively heated crucibles having encapsulated metal nanowires/crystals in their channels. Because of nanometer size of the system and intimate contact between the CNTs and confined metals, an efficient heat transfer and high cooling rates (∼10(13) K/s) were achieved as a result of a flash bias pulse followed by system natural quenching, leading to the formation of disordered amorphous-like structures in iron, cobalt, and gold. An intermediate state between crystalline and amorphous phases was discovered, revealing a memory effect of local short-to-medium range order during these phase transitions. Furthermore, subsequent directional crystallization of an amorphous iron nanowire formed by this method was realized under controlled Joule heating. High-density crystalline defects were generated during crystallization due to a confinement effect from the CNT and severe plastic deformation involved.
Spatially resolved cathodoluminescence of individual BN-coated CaS:Eu nanowires
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0NR00700E
Abstract: Luminescence properties of in idual BN-coated CaS:Eu nanowires have been studied by high-spatial-resolution cathodoluminescence (CL) spectroscopy. A broad red light-emitting band from an in idual nanowire has been observed. Detailed local CL studies on the nanowires reveal spatial variations of luminescence from the structure surfaces toward their cores. Such variations are attributed to the different Eu2+ ions surroundings within the surface and core nanowire regions. The attractive luminescence properties are meaningful for fundamental studies of nanoscaled luminescent materials and may be of interest for novel optoelectronic applications.
Aluminum matrix composites reinforced with multi-walled boron nitride nanotubes fabricated by a high-pressure torsion technique
Publisher: Elsevier BV
Date: 12-2015
SiO 2 -sheathed InS nanowires and SiO2 nanotubes
Publisher: AIP Publishing
Date: 03-11-2003
DOI: 10.1063/1.1626259
Abstract: InS nanowires uniformly sheathed with amorphous SiO2 were synthesized via a physical vapor deposition process. InS nanowires were 20–100 nm in diameter, and the SiO2 sheaths were 5–20 nm in thickness. Single-crystalline InS cores displayed orthorhombic structure and their longitudinal directions were preferentially aligned in the [100] orientation. Pure SiO2 nanotubes of typically round cross sections were also obtained by removing InS cores from the prepared nanocables via thermal evaporation. Photoluminescence measurements on these SiO2 nanotubes demonstrated strong visible-light emission peaked at 570 nm.
In Situ TEM Electrical and Mechanical Probing of Individual Multi-walled Boron Nitride Nanotubes
Publisher: Springer Berlin Heidelberg
Date: 2010
Dense and vertically-aligned centimetre-long ZnS nanowire arrays: ionic liquid assisted synthesis and their field emission properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2NR11835A
Abstract: Based on the self-ordering behavior of ionic liquids on solid surface, a gold ion containing ionic liquid was employed to obtain a uniform pattern of gold nanoparticles on Si substrate. Using this catalytic pattern, super-dense, centimetre long, well-crystallized and vertically-aligned ZnS nanowire arrays were then generated. It was found that the densely-packed gold nanoparticles played a key role in the nanowire alignment. Furthermore, the field-emission measurements show that the present ultralong ZnS nanowires arrays possess a low turn-on field of 3.69 V μm(-1) and a high field-enhancement factor of 1215.4, indicating they are valuable field emitters.
Growth studies, TEM and XRD investigations of iron‐filled carbon nanotubes
Publisher: Wiley
Date: 28-03-2006
Noncovalent functionalization of boron nitride nanotubes using water-soluble synthetic polymers and the subsequent preparation of superhydrophobic surfaces
Publisher: Springer Science and Business Media LLC
Date: 26-09-2012
DOI: 10.1038/PJ.2012.170
Laser-Ablation Growth and Optical Properties of Wide and Long Single-Crystal SnO2 Ribbons
Publisher: Wiley
Date: 05-06-2003
Galvanic replacement of liquid metal Galinstan with copper for the formation of photocatalytically active nanomaterials
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NJ02652B
Abstract: Galvanic replacement of liquid metal Galinstan under mechanical agitation with copper creates a multi-elemental system that is photocatalytically active for the degradation of organic dyes where reuseability is achieved via immobilisation on a solid support.
Synthesis and characterization of ropes made of BN multiwalled nanotubes
Publisher: Elsevier BV
Date: 05-2001
Temperature measurement using a gallium-filled carbon nanotube nanothermometer
Publisher: AIP Publishing
Date: 30-09-2003
DOI: 10.1063/1.1616201
Abstract: We report here temperature measurement by means of a Ga-filled C nanotube thermometer with diameter & nm and length ∼12 μm. The method relies on the initial identification and calibration of a nanothermometer in a transmission electron microscope (TEM), followed by placing it into an air-filled furnace whose temperature is to be measured, and final TEM reading of a postmeasurement gradation mark visible inside the tubular channel. The mark originates from the fact that, at high temperature, the Ga column tip exposed to the air through the open C nanotube end oxidizes, and a thin Ga oxide layer sticks to the nanotube walls upon cooling. The temperature according to this gradation mark coincides closely with nominal furnace temperature controlled by standard means. The method paves the way for practical temperature measurements using a C nanothermometer in air and within spatially localized regions (e.g., dimensions of tens of micrometers).
Nanoscale Bending of Multilayered Boron Nitride and Graphene Ribbons: Experiment and Objective Molecular Dynamics Calculations
Publisher: American Physical Society (APS)
Date: 11-07-2012
Open nanotubes of insulating boron nitride
Publisher: AIP
Date: 2001
DOI: 10.1063/1.1420059
Synthesis and structure of InP nanowires and nanotubes
Publisher: Elsevier BV
Date: 07-2003
Copper-Filled Carbon Nanotubes: Rheostatlike Behavior and Femtogram Copper Mass Transport
Publisher: Wiley
Date: 03-08-2007
Reversible Tuning of Individual Carbon Nanotube Mechanical Properties via Defect Engineering
Publisher: American Chemical Society (ACS)
Date: 29-07-2016
DOI: 10.1021/ACS.NANOLETT.6B02287
Abstract: The structural defects that inevitably exist in real-world carbon nanotubes (CNTs) are generally considered undesirable because they break the structural perfection and may result in drastically degraded CNT properties. On the other hand, the deliberate defect introduction can provide a possibility to tailor the tube mechanical properties. Herein, we present a fully controllable technique to handle defects by using in situ transmission electron microscopy (TEM). Young's modulus, quality factor of the resonation and tensile strength of CNTs can be controllably, reversibly, and repeatedly tuned. Parallel high-resolution visualizing of structural defects suggests that the property tuning cycles are primarily attributed to the reversible conversion of defects at the atomic scale: the defects are created in the form of vacancies and interstitials under electron irradiation, and they vanish through the recombination via current-induced annealing. For applications, such as reversible frequency-tuned CNT resonators, this defect-engineering technique is demonstrated to be uniquely precise the frequency may be tuned with 0.1%/min accuracy, improved by 1 order of magnitude compared with the existing approaches. We believe that these results will be highly valuable in a variety of property-tunable CNT-based composites and devices.
Phonon-Assisted Electron Emission from Individual Carbon Nanotubes
Publisher: American Chemical Society (ACS)
Date: 09-02-2011
DOI: 10.1021/NL103861P
Abstract: A question of how electrons can escape from one-atom-thick surfaces has seldom been studied and is still not properly answered. Herein, lateral electron emission from a one-atom-thick surface is thoroughly studied for the first time. We study electron emission from side surface of in idual electrically biased carbon nanotubes (CNTs) both experimentally and theoretically and discover a new electron emission mechanism named phonon-assisted electron emission. A kinetic model based on coupled Boltzmann equations of electrons and optical phonons is proposed and well describes experimentally measured lateral electron emission from CNTs. It is shown that the electrons moving along a biased CNT can overflow from the one-atom-thick surface due to the absorption of hot forward-scattering optical phonons. A low working voltage, high emission density, and side emission character make phonon-assisted electron emission primarily promising in electron source applications.
Phosphorus recovery from centralised municipal water recycling plants
Publisher: Elsevier BV
Date: 2012
High-pressure polymorphs in bulk silicon formed at relativistic laser intensity
Publisher: Research Square Platform LLC
Date: 09-11-2022
DOI: 10.21203/RS.3.RS-2060424/V1
Abstract: Silicon polymorphs with exotic electronic and optical properties have recently attracted significant attention due to the wide range of useful bandgap characteristics1,2,3,4. They are typically formed by high pressure techniques, which put limitations on the s le volumes and their crystal structure5,6,7,8,9,10. This constitutes a major obstacle to study these polymorphs and their incorporation into existing technology. Here, we report on a new approach to create unusual crystal structures deep into the bulk of a silicon wafer by MeV-electrons generated by laser irradiation at ultra-relativistic intensity above ~2x10^18 W/cm2. Strong repulsion between the electrons, their branching due to self-generated magnetic field and nonlinear relativistic effects11,12,13 enhance deposition of their energy deep into the target and form high energy density conditions leading to ionisation, followed by fast quenching and restructuring into new crystal arrangements14,15,16,17,18. Analysis by Raman spectroscopy, synchrotron X-ray diffraction, and high-resolution transmission electron microscopy of nanocrystals formed in the irradiated s les provide compelling evidence of the formation of metastable Si phases. The unexplored domain of material transformations exposed to laser-produced MeV-electrons opens new pathways for the conversion into new crystal structures applicable to a wide range of materials at considerably larger quantity, all preserved for further studies and exploitation.
High-Yield Synthesis of Rhombohedral Boron Nitride Triangular Nanoplates
Publisher: Wiley
Date: 17-08-2007
Potential upgrading of bio-refinery streams by electrodialysis
Publisher: Elsevier BV
Date: 08-2017
Novel Synthesis and Functionalization of Boron Nitride Nanotubes
Publisher: Oxford University Press (OUP)
Date: 31-07-2006
DOI: 10.1017/S143192760606171X
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006
Limitations for transferring lab-scale microfiltration results to large-scale membrane bioreactor (MBR) processes
Publisher: Elsevier BV
Date: 07-2012
Highly ductile UV-shielding polymer composites with boron nitride nanospheres as fillers
Publisher: IOP Publishing
Date: 23-02-2015
DOI: 10.1088/0957-4484/26/11/115702
Abstract: Polymer composites with enhanced mechanical, thermal or optical performance usually suffer from poor ductility induced by confined mobility of polymer chains. Herein, highly ductile UV-shielding polymer composites are successfully fabricated. Boron nitride (BN) materials, with a wide band gap of around ∼6.0 eV, are used as fillers to achieve the remarkably improved UV-shielding performance of a polymer matrix. In addition, it is found that spherical morphology BN as a filler can keep the excellent ductility of the composites. For a comparison, it is demonstrated that traditional fillers, including conventional BN powders can achieve the similar UV-shielding performance but dramatically decrease the composite ductility. The mechanism behind this phenomenon is believed to be lubricant effects of BN nanospheres for sliding of polymer chains, which is in consistent with the thermal analyses. This study provides a new design to fabricate UV-shielding composite films with well-preserved ductility.
Fabrication of vertically aligned single-crystalline lanthanum hexaboride nanowire arrays and investigation of their field emission
Publisher: Springer Science and Business Media LLC
Date: 07-2013
DOI: 10.1038/AM.2013.25
CoO octahedral nanocages for high-performance lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC30843F
Abstract: Pure-phase CoO octahedral nanocages were successfully fabricated by a novel simple method. The coordination etching agents play key roles in the formation of these non-spherical hollow structures. When tested as anode materials in lithium ion batteries (LIBs), these nanocages showed excellent cycling performance, good rate capability and enhanced lithium storage capacity.
Mesoporous TiO2-based architectures as promising sensing materials towards next-generation biosensing applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TB02292F
Abstract: This review highlights the recent development of mesoporous TiO 2 -based architectures as promising sensing materials for diagnosing diseases and detecting harmful substances in the human body.
Novel polymer nanocomposites from bioinspired green aqueous functionalization of BNNTs
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2PY00612J
Direct Pyrolysis Method for Superconducting Crystalline MgB2 Nanowires
Publisher: American Chemical Society (ACS)
Date: 28-06-2003
DOI: 10.1021/CM021823L
Nurses’ perceptions of using volunteer support in health care settings: A systematic scoping review
Publisher: Wiley
Date: 22-10-2023
DOI: 10.1111/INR.12806
Abstract: To understand nurses’ perceptions of volunteer support in health care settings. Increasingly, volunteers provide specialised support to health care service users, requiring volunteers and nurses to work closely together. However, little is known about nurses’ perceptions of volunteer support. A scoping review was conducted following the PRISMA‐ScR checklist. A mixed‐methods convergent integrative approach was taken guided by the JBI framework. Quantitative data were transformed into qualitative data for synthesis and descriptive thematic analysis. Six databases were searched (CINHAL+, EMBASE, PubMed, Scopus, PsycInfo, ProQuest Health and Medical Collection) on 24 January 2022 using terms related to nurses, perceptions, volunteers and care settings, followed by a manual search. The search was limited to English language articles published during 2000–2022. Studies were included if they reported nurses’ perceptions of volunteers supporting care within any health care setting. Of the 943 records identified, 12 met the inclusion criteria. All 12 were included in the review following critical appraisal. Five themes were identified: perceived benefits for patients, volunteers providing support for nursing staff, nurses’ valuing volunteer support, nurses’ understanding of the volunteer role and nurses’ understanding of recruitment and training of volunteers. Nurses generally viewed volunteer support positively and perceived that it benefitted patients and assisted nurses. Some nurses raised concerns about the burden of additional supervision of volunteers and lacked knowledge of the volunteer role, recruitment and training. Emerging innovative models of nurse‐led volunteer support can maximise the contribution of volunteers and help overcome barriers to volunteer acceptance. These findings will inform volunteer policies and provide guidance in developing volunteer support programs.
Multi-walled boron nitride nanotubes composed of diverse cross-section and helix type shells
Publisher: Springer Science and Business Media LLC
Date: 17-02-2007
Comparative Fracture Toughness of Multilayer Graphenes and Boronitrenes
Publisher: American Chemical Society (ACS)
Date: 05-01-2015
DOI: 10.1021/NL5042066
Abstract: We report the comparative in situ fracture toughness testing on single-edge V/U-notched multilayer graphenes and boronitrenes in a high-resolution transmission electron microscope (HRTEM). The nanostructures of notch tips and fracture edges of the tested specimens are unambiguously resolved using HRTEM. By analyzing the notch tip stresses using finite element method, the fracture toughness of multilayer graphenes and boronitrenes is determined to be 12.0 ± 3.9 and 5.5 ± 0.7 MPa√m, respectively, taking into account the notch tip blunting effects.
Visible-blind deep-ultraviolet Schottky photodetector with a photocurrent gain based on individual Zn2GeO4 nanowire
Publisher: AIP Publishing
Date: 18-10-2010
DOI: 10.1063/1.3491212
Abstract: We report on the visible-blind deep-ultraviolet (DUV) photodetectors with metal-semiconductor-metal (MSM) Schottky contacts based on in idual Zn2GeO4 nanowire single-crystals. At an 8 V bias voltage, the device shows an extremely low dark current (& .1 pA), a responsivity of 38.3 A/W (corresponding gain ∼200), a high DUV-to-visible discrimination ratio up to ∼104, and a relatively fast response time upon 245 nm DUV illumination. By analyzing the light-intensity-dependent photocurrent generation and carrier transport, the photogenerated holes trapped in Schottky barrier and shrinking of depletion region under DUV illumination at the metal/Zn2GeO4 interface are proposed for the carrier injection and the photocurrent gain.
Zero-emission multivalorization of light alcohols with self-separable pure H2 fuel
Publisher: Elsevier BV
Date: 09-2021
Local temperature measurements on nanoscale materials using a movable nanothermocouple assembled in a transmission electron microscope
Publisher: IOP Publishing
Date: 09-11-2011
DOI: 10.1088/0957-4484/22/48/485707
Abstract: A nanoscale thermocouple consisting of merged Cu and Cu-Ni tips is developed for local temperature measurements on advanced nanomaterials by using a probing technique in a high-resolution transmission electron microscope (TEM) equipped with a double probe scanning tunneling microcopy (STM) unit. The fabricated nanothermocouple works as the so-called T-type thermocouple and displays a quick response and high spatial and thermal resolutions. A generated thermoelectromotive force which reflects rapid temperature changes controlled by electron beam intensity alternations on a metal nanoelectrode proves the technique's usefulness for high-precision local temperature measurements. The developed method demonstrates the effectiveness while also measuring temperature changes in Joule heated multi-walled carbon nanotubes (CNTs) and in a modeled electrical conductive composite nanosystem.
Flexible Ultraviolet Photodetectors with Broad Photoresponse Based on Branched ZnS-ZnO Heterostructure Nanofilms
Publisher: Wiley
Date: 12-02-2014
Abstract: The application of nanofilm networks made of branched ZnS-ZnO nanostructures as a flexible UV photodetector is demonstrated. The fabricated devices show excellent operational characteristics: tunable spectral selectivity, widerange photoresponse, fast response speed, and excellent environmental stability.
Improved Li+ Storage through Homogeneous N-Doping within Highly Branched Tubular Graphitic Foam
Publisher: Wiley
Date: 02-12-2017
Abstract: A novel carbon structure, highly branched homogeneous-N-doped graphitic (BNG) tubular foam, is designed via a novel N, N-dimethylformamide (DMF)-mediated chemical vapor deposition method. More structural defects are found at the branched portions as compared with the flat tube domains providing abundant active sites and spacious reservoirs for Li
Electrical field-assisted thermal decomposition of boron nitride nanotube: Experiments and first principle calculations
Publisher: Elsevier BV
Date: 09-2009
Fine structure of boron nitride nanotubes produced from carbon nanotubes by a substitution reaction
Publisher: AIP Publishing
Date: 15-08-1999
DOI: 10.1063/1.371058
Abstract: Here we report on the precise structural investigation of multiwalled boron nitride (BN) nanotubes by means of high-resolution transmission electron microscopy and electron energy loss spectroscopy. The nanotubes were produced from carbon nanotubes by applying a recently discovered technique: a substitution chemical reaction [W. Han, Y. Bando, K. Kurashima, and T. Sato, Appl. Phys. Lett. 73, 3085 (1998)]. It is found that in contrast to the starting carbon nanotubes, which exhibited large number of shells (typically & ), a significant proportion of buckled and corrugated graphene-like sheets, poor degree of graphitization, and wide distribution of helicities, the resultant BN nanotubes revealed perfectly straight shapes, limited number of shells (typically 2–6), and remarkable ordering of the graphene-like sheets in the so-called nonhelical “zig-zag” fashion with the [101̄0] direction parallel to the tube axis.
Single‐Crystalline ZnS Nanobelts as Ultraviolet‐Light Sensors
Publisher: Wiley
Date: 21-05-2009
Simultaneous Electropolymerization and Electro-Click Functionalization for Highly Versatile Surface Platforms
Publisher: American Chemical Society (ACS)
Date: 16-04-2014
DOI: 10.1021/NN501306Y
Abstract: Simple preparation methods of chemically versatile and highly functionalizable surfaces remain rare and present a challenging research objective. Here, we demonstrate a simultaneous electropolymerization and electro-click functionalization process (SEEC) for one-pot self-construction of aniline- and naphthalene-based functional polymer films where both polymerization and click functionalization are triggered by applying electrochemical stimuli. Cyclic voltammetry (CV) can be applied for the simultaneous oxidation of 4-azidoaniline and the reduction of Cu(II) ions, resulting in polymerization of the former, and the Cu(I)-catalyzed alkyne/azide cycloaddition ("click" chemistry). Properties of the films obtained can be tuned by varying their morphology, their chemically "clicked" content, or by postconstruction functionalization. To demonstrate this, the CV scan rates, component monomers, and "clicked" molecules were varied. Covalent postconstruction immobilization of horseradish peroxidase was also performed. Consequently, pseudocapacitance and enzyme activity were affected. SEEC provides surface scientists an easy access to a wide range of functionalization possibilities in several fields including sensors, fuel cells, photovoltaics, and biomaterials.
Single‐Catalyst Confined Growth of ZnS/Si Composite Nanowires
Publisher: Wiley
Date: 25-01-2005
Quasi-Aligned Ga2O3 Nanowires Grown on Brass Wire Meshes and Their Electrical and Field-Emission Properties
Publisher: American Chemical Society (ACS)
Date: 12-01-2009
DOI: 10.1021/JP809800N
Effects of strain-rate and ageing at 573 and 973 K on the mechanical (compressive) behaviour of 〈110〉 oriented (‘soft’) NiAl single crystals with and without microalloying additions of Ti, Zr, and Hf.
Publisher: Elsevier BV
Date: 1996
Single-crystalline AIN nanotubes with carbon-layer coatings on the outer and inner surfaces via a multiwalled-carbon-nanotube-template-induced route
Publisher: No publisher found
Date: 2005
Nanocages of layered BN: Super-high-pressure nanocells for formation of solid nitrogen
Publisher: AIP Publishing
Date: 29-04-2002
DOI: 10.1063/1.1469599
Abstract: We observed high N contents inside BN fullerenelike multilayered nanocages (ca. 30–100 nm) formed by reacting CNx nanotubes (x⩽0.1) and B2O3 in a N2 atmosphere at 1985–2113 K. High-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy, energy dispersion x-ray spectroscopy, electron diffraction analysis, spatially resolved energy-filtered TEM, and in situ TEM electron irradiation studies suggest that super-high pressures (of several GPa) are generated inside nanocages, responsible of crystallizing gaseous nitrogen trapped within the BN shells. In addition, high-pressure-induced phase transformation of graphiticlike BN into diamondlike cubic BN occurs inside the nanocages. Thus, BN nanocages play an unusual role of super-high-pressure nanocells.
Structure and Superelasticity of Novel Zr-Rich Ti-Zr–Nb Shape Memory Alloys
Publisher: Springer Science and Business Media LLC
Date: 10-05-2021
Removal of contaminants of concern in water using advance oxidation techniques
Publisher: IWA Publishing
Date: 06-2007
DOI: 10.2166/WST.2007.421
Abstract: This research involves the removal of contaminants of concern in water supplies using advanced oxidation technologies, in particular titanium dioxide photocatalysis. Photocatalysis for the removal of 1,4-dioxane and the natural (17β-oestradiol, oestriol) and synthetic (17α-ethynyloestradiol) oestrogens in water was investigated using both UVA and solar radiation. The H2O2/UVC process, solar, UVC and UVA light alone were also investigated and the processes compared. It was found that TiO2 photocatalysis is an effective method for the degradation of the natural (17β-oestradiol and oestriol) and the synthetic (17α-ethynyloestradiol) oestrogens in water in immobilised Degussa P25 and sol-gel spiral reactors with both UVA and solar radiation as the light source. Photocatalysis using the commercial catalyst Degussa P25 as an immobilised reactor with a UVA l shows the best performance. Photocatalysis was shown to completely mineralise 1,4-dioxane to CO2 in Degussa P25 suspension and sol-gel reactors using both UVA and solar radiation. The commercial catalyst Degussa P25 in suspension with UVA radiation shows the best performance. Photocatalysis is much more efficient than H2O2/UVC, UVA, UVC and solar radiation alone for all contaminants investigated.
Synthesis, structural analysis and in situ transmission electron microscopy mechanical tests on individual aluminum matrix/boron nitride nanotube nanohybrids
Publisher: Elsevier BV
Date: 10-2012
Cleaning strategies for iron-fouled membranes from submerged membrane bioreactor treatment of wastewaters
Publisher: Elsevier BV
Date: 02-2015
An ion-exchange route for the synthesis of hierarchical In2S3/ZnIn2S4 bulk composite and its photocatalytic activity under visible-light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2DT32271D
Abstract: In(2)S(3)/ZnIn(2)S(4) bulk composite was successfully synthesized through an ion-exchange route using NaInS(2) as a precursor. Compared with the constituent pure component (In(2)S(3) or ZnIn(2)S(4)), the photocatalytic H(2) evolution of the composite was greatly enhanced because of the efficient separation and migration of photoexcited carriers (electrons and holes) at the interface of the bulk composite.
A Fully Transparent and Flexible Ultraviolet–Visible Photodetector Based on Controlled Electrospun ZnO‐CdO Heterojunction Nanofiber Arrays
Publisher: Wiley
Date: 27-08-2015
Boron Nitride Nanotubes: Nanoparticles Functionalization and Junction Fabrication
Publisher: American Scientific Publishers
Date: 02-2007
DOI: 10.1166/JNN.2007.120
Abstract: Adopting a wet chemistry method, Au and Fe 3 O 4 nanoparticles were functionalized on boron nitride nanotubes (BNNTs) successfully for the first time. X-ray diffraction pattern and transmission electron microscopy were used to characterize the resultant products. Subsequently, a method was proposed to fabricate heterojunction structures based on the particle-functionalized BNNTs. As a demonstration, BNNT-carbon nanostructure, BNNT-ZnO and BNNT-Ga 2 O 3 junctions were successfully fabricated using the functionalized particles as catalysts.
Cheap, Gram-Scale Fabrication of BN Nanosheets via Substitution Reaction of Graphite Powders and Their Use for Mechanical Reinforcement of Polymers
Publisher: Springer Science and Business Media LLC
Date: 27-02-2014
DOI: 10.1038/SREP04211
Abstract: As one of the most important two-dimensional (2D) materials, BN nanosheets attracted intensive interest in the past decade. Although there are many methods suitable for the preparation of BN sheets, finding a cheap and nontoxic way for their mass and high-quality production is still a challenge. Here we provide a highly effective and cheap way to synthesize gram-scale-level well-structured BN nanosheets from many common graphite products as source materials. Single-crystalline multi-layered BN sheets have a mean lateral size of several hundred nanometers and a thickness ranging from 5 nm to 40 nm. Cathodoluminescence (CL) analysis shows that the structures exhibit a near band-edge emission and a broad emission band from 300 nm to 500 nm. Utilization of nanosheets for the reinforcement of polymers revealed that the Young's modulus of BN/PMMA composite had increased to 1.56 GPa when the BN's fraction was only 2 wt.%, thus demonstrating a 20% gain compared to a blank PMMA film. It suggests that the BN nanosheet is an ideal mechanical reinforcing material for polymers. In addition, this easy and nontoxic substitution method may provide a universal route towards high yields of other 2D materials.
Nanostructured BN–Mg composites: features of interface bonding and mechanical properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP06289F
Abstract: Using first-principles calculations, we investigate the stability and mechanical properties of a nanocomposite made of magnesium reinforced with boron nitride (BN) nanostructures (BN nanotubes and BN monolayers).
Formation, Structure, and Structural Properties of a New Filamentary Tubular Form: Hollow Conical-Helix of Graphitic Boron Nitride
Publisher: American Chemical Society (ACS)
Date: 10-06-2003
DOI: 10.1021/JA030003M
Abstract: A novel tubular form of graphitic boron nitride (BN) displaying a hollow conical-helix was discovered. It was generated via wrapping a single beltlike filament according to the geometry of an Archimedes spiral. Cone apex angles of helical-conical nanotubes (HCNTs) were found to exhibit specific values, each of which refers to a certain coincidence site lattice. A unique structural property of HCNTs was observed, displaying the transformation of apex angles during the annealing process. The observed apex angles were reduced with decreasing annealing temperature, which is in accordance with an estimated HCNT strain energy decrease for a given tubular radius. It is suggested that the curvature and apex angle of a HCNT are determined by a sole dynamic element, that is, enthalpy (DeltaH), whereas the HCNT disclination configuration changes through helical sliding of the filament.
Cobalt(ii,iii) oxide hollow structures: fabrication, properties and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM33940D
Morphology-Dependent Stimulated Emission and Field Emission of Ordered CdS Nanostructure Arrays
Publisher: American Chemical Society (ACS)
Date: 23-03-2009
DOI: 10.1021/NN800895K
Abstract: Highly ordered CdS nanostructure arrays were successfully fabricated via a simple two-step metal-organic chemical vapor deposition process. Both stimulated emission and field-emission measurements were carried out in an attempt to understand the correlation between the morphologies, alignments, and emission performances of five ordered CdS nanostructure array types (well-aligned truncated nanocones, nanorods, cleft nanorods, quasi-aligned nanowires, and nanowires). The 1D CdS nanostructures of various types displayed notable differences in stimulated and field-emission performances. The stimulated emission strongly correlated with the structure alignment: the better the alignment, the lower the threshold. Both of the alignments and aspect ratios greatly affected the field-emission properties the CdS emitters of higher aspect ratio and better alignment exhibited better field-emission performance. Thus the well-aligned CdS nanorod arrays had the lower threshold for stimulated emission, and quasi-aligned nanowire arrays produced the higher field-emission current and possessed the lower turn-on fields.
Growth of Wurtzite ZnS Micrometer-Sized Diskettes and Nanoribbon Arrays with Improved Luminescence
Publisher: Wiley
Date: 05-2005
ONGOING DISCUSSION + SOVIET FORCED LABOR CAMPS
Publisher: Cambridge University Press (CUP)
Date: 1989
DOI: 10.2307/2499843
Phases and crystallization of encapsulated cobalt nanorods inside BN nanotubes
Publisher: Elsevier BV
Date: 02-2004
Aqueous Noncovalent Functionalization and Controlled Near-Surface Carbon Doping of Multiwalled Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 10-06-2008
DOI: 10.1021/JA8020878
Abstract: Noncovalent functionalization of boron nitride nanotubes (BNNTs) in aqueous solution was achieved by means of pi-stacking of an anionic perylene derivative, through which carboxylate-functionalized BNNTs were prepared for the first time. Starting from the functionalized nanotubes, an innovative methodology was designed and demonstrated for the controlled near-surface carbon doping of BNNTs. As a result of such delicate doping, novel B-C-N/BN coaxial nanotubes have been fabricated, and their p-type semiconducting behaviors were elucidated through gate-dependent transport measurements.
Ultra-stable sodium ion storage of biomass porous carbon derived from sugarcane
Publisher: Elsevier BV
Date: 10-2022
Single-crystalline, submicrometer-sized ZnSe tubes
Publisher: Wiley
Date: 18-04-2005
Recent advances in solution-processed inorganic nanofilm photodetectors
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CS60348B
Abstract: As important opto-electronical devices, nanofilm photodetectors constructed from inorganic low-dimensional nanostructures have drawn prime attention due to their significance in basic scientific research and potential technological applications. This review highlights a selection of important topics pertinent to inorganic nanofilm photodetectors processed via solution strategies. This article begins with a description of the advantages and drawbacks of nanofilm-based photodetectors versus 1D nanostructure-based ones, and then introduces rational design and controlled syntheses of various nanofilms via different wet-chemical routes, and then mainly focuses on their optoelectronic properties and applications in photodetectors based on the different types of nanofilms. Finally, the general challenges and the potential future directions of this exciting research and technology area are presented.
Boron nitride nanotube growth defects and their annealing-out under electron irradiation
Publisher: Elsevier BV
Date: 11-1997
Effective synthesis of surface-modified boron nitride nanotubes and related nanostructures and their hydrogen uptake
Publisher: Elsevier BV
Date: 05-2008
Synthesis and field emission of carbon nanotubular fibers doped with high nitrogen content
Publisher: Royal Society of Chemistry (RSC)
Date: 2003
DOI: 10.1039/B311807J
Abstract: Nitrogen-doped carbon nanotubular fibers with a very high nitrogen concentration (approximately 20 at.%) were synthesized through the aerosol-assisted decomposition of dimethylformamide in the presence of catalyst. The synthesized fibers process a novel "pearl necklace-like" morphology and exhibit an excellent field emission performance.
Polyol Synthesis of Ag/BN Nanohybrids and their Catalytic Stability in CO Oxidation Reaction
Publisher: Wiley
Date: 03-02-2020
Deep-ultraviolet solar-blind photoconductivity of individual gallium oxide nanobelts
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0NR00702A
Abstract: We designed solar-blind deep-ultraviolet semiconductor photodetectors using in idual Ga2O3 nanobelts. The photoconductive behavior was systematically studied. The photodetectors demonstrate high selectivity towards 250 nm light, fast response times of less than 0.3 s, and a large photocurrent to dark current ratio of up to 4 orders of magnitude. The photoresponse parameters such as photocurrent, response time, and quantum efficiency depend strongly on the intensity of light, the detector environment, and the nanobelt size. The photoresponse mechanism was discussed, which was mainly attributed to the band bending, surface traps, and distribution of traps in the bandgap. Present Ga2O3 nanobelts can be exploited for future applications in photo sensing, light-emitting diodes, and optical switches.
Synthesis and Interface Structures of Zinc Sulfide Sheathed Zinc−Cadmium Nanowire Heterojunctions
Publisher: American Chemical Society (ACS)
Date: 07-2006
DOI: 10.1021/JP0627832
Abstract: Zinc sulfide (ZnS) sheathed zinc (Zn)-cadmium (Cd) nanowire heterojunctions have been prepared by thermal evaporating of ZnS and CdS powders in a vertical induction furnace at 1200 degrees C. Studies found that both the Zn and Cd subnanowires, within a single nanoheterojunction, are single-crystallines with the growth directions perpendicular to the [210] plane, whereas the sheathed ZnS is polycrystalline with a thickness of ca. 5 nm. The Zn/Cd interface structure in the ZnS sheathed Zn-Cd nanowire heterojunctions was thoroughly experimentally studied by high-resolution transmission electron microscopy and theoretically studied using a near-coincidence site lattice (NCSL) concept. The results show that the Cd and Zn have a crystalline orientation relationship as [0001]Zn//[0001]Cd, (10(-)10)Zn//(10(-)10)Cd, (01(-)10)Zn//(01(-)10)Cd, and ((-)1100)Zn//((-)1100)Cd.
Template-free synthesis of boron nitride foam-like porous monoliths and their high-end applications in water purification
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA08134C
Abstract: New boron nitride porous monoliths with high efficiency and excellent adsorption applications were successfully fabricated by a brand-new and template-free method.
Characteristics of Boron Nitride Nanotube–Polyaniline Composites
Publisher: Wiley
Date: 08-12-2005
Simulation of NOM removal by capillary NF: A numerical method for full-scale plant design
Publisher: Elsevier BV
Date: 06-2018
Magnetic nanocables—Silicon carbide sheathed with iron-oxide-doped amorphous silica
Publisher: AIP Publishing
Date: 23-01-2006
DOI: 10.1063/1.2167787
Abstract: High-purity nanocables of iron-containing amorphous-silica-sheathed silicon carbide were synthesized by a thermal reaction method using silicon wafer as the silicon source and growth substrate, and ferrocene as the carbon and iron catalyst precursor. The nanocables were tens of μm in length and 40–60nm in diameter. Iron oxide nanoparticles with a mean diameter of 5nm were dispersed evenly in the amorphous silica layer. The nanocables were found to be ferromagnetic at both 10K and room temperature, which indicates that they may have important potential applications in electromagnetic nanodevices.
Numerical study of CaCO3 scaling in submerged vacuum membrane distillation and crystallization (VMDC)
Publisher: Elsevier BV
Date: 08-2018
Preparation and Characterization of Well-Ordered Hexagonal Mesoporous Carbon Nitride
Publisher: Wiley
Date: 04-07-2005
Facile synthesis of vertically aligned hexagonal boron nitride nanosheets hybridized with graphitic domains
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM15109J
Tensile Tests on Individual Multi‐Walled Boron Nitride Nanotubes
Publisher: Wiley
Date: 20-08-2010
The Role of Geometric Sites in 2D Materials for Energy Storage
Publisher: Elsevier BV
Date: 06-2018
Thin boron nitride nanotubes with exceptionally high strength and toughness
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR00651D
Abstract: Bending manipulation and direct force measurements of ultrathin boron nitride nanotubes (BNNTs) were performed inside a transmission electron microscope. Our results demonstrate an obvious transition in mechanics of BNNTs when the external diameters of nanotubes are in the range of 10 nm or less. During in situ transmission electron microscopy bending tests, characteristic "hollow" ripple-like structures formed in the bent ultrathin BNNTs with diameters of sub-10 nm. This peculiar buckling/bending mode makes the ultrathin BNNTs hold very high post-buckling loads which significantly exceed their initial buckling forces. Exceptional compressive/bending strength as high as ∼1210 MPa was observed. Moreover, the analysis of reversible bending force curves of such ultrathin nanotubes indicates that they may store/adsorb strain energy at a density of ~400 × 10(6) J m(-3). Such nanotubes are thus very promising for strengthening and toughening of structural ceramics and may find potential applications as effective energy-absorbing materials like armor.
Alignment of Boron Nitride Nanotubes in Polymeric Composite Films for Thermal Conductivity Improvement
Publisher: American Chemical Society (ACS)
Date: 18-03-2010
DOI: 10.1021/JP911431F
Synthesis and optical study of crystalline GaP nanoflowers
Publisher: AIP Publishing
Date: 18-02-2005
DOI: 10.1063/1.1875732
Abstract: GaP nanoflowers composed of numerous GaP nanowires are synthesized through heating InP and Ga2O3 powders. Crystalline GaP nanowires growing from Ga-rich particles have a cubic structure, uniform diameters of ∼300nm, and lengths from several to tens of micrometers. Typically, an in idual GaP nanowire displays a hexagonal prism-like morphology with ⟨111⟩ as the preferential growth direction. Cathodoluminescence measurements show that GaP nanoflowers and GaP nanowires emit at ∼600 and ∼750nm, respectively. Additional low-intensity emission peaks are observed for GaP nanoflowers at ∼450nm.
Scalable production of 3D plum-pudding-like Si/C spheres: Towards practical application in Li-ion batteries
Publisher: Elsevier BV
Date: 06-2016
SnO2 Nanoparticle-Functionalized Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 12-04-2006
DOI: 10.1021/JP056705A
Abstract: Boron nitride nanotubes (BNNTs) were synthesized by a carbon-free chemical vapor deposition method using boron and metal oxide as reactants. Then SnO(2) nanoparticles were functionalized on them via a simple wet chemistry method. Detailed transmission electron microscopy (TEM) observations reveal that SnO(2) nanoparticles may cover the tube surface or be encapsulated in tube channels. The lattice distances of both BNNT and SnO(2) have been changed due to the strong interactions between them. The band gap energy of SnO(2) particles is found enlarged due to the size effect and interaction with BNNTs.
Synthesis of BN Nanotubes in a Laser Heated DAC.
Publisher: The Japan Society of High Pressure Science and Technology
Date: 1998
Improvement of a Ti50Pd30Ni20 high temperature shape memory alloy by thermomechanical treatments
Publisher: Elsevier BV
Date: 05-1994
Membrane bioreactors: overview of the effects of module geometry on mixing energy
Publisher: Wiley
Date: 05-2009
DOI: 10.1002/APJ.248
Systematic Investigation of the Formation of 1D α‐Si3N4 Nanostructures by Using a Thermal‐Decomposition/Nitridation Process
Publisher: Wiley
Date: 27-03-2006
Abstract: This article describes a simple thermal-decomposition/nitridation method for the large-scale synthesis of 1D alpha-Si(3)N(4) nanostructures, such as millimeter-scale microribbons, nanosaws, nanoribbons, and nanowires. These nanostructures are systematically investigated by checking the product deposited at different areas by using powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and electron energy loss spectroscopy. Studies show that all these nanostructures have a single-crystalline nature and predominantely grow along the [011] direction. These 1D nanostructures are formed by thermal decomposition, followed by the nitridation of SiO.
ZnO quantum dots anchored in multilayered and flexible amorphous carbon sheets for high performance and stable lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA12511B
Abstract: The role of the carbonaceous component in the excellent (de)lithiation properties of a ZnO/carbon anode material, as revealed by in situ TEM.
Direct imaging of Joule heating dynamics and temperature profiling inside a carbon nanotube interconnect
Publisher: Springer Science and Business Media LLC
Date: 09-08-2011
DOI: 10.1038/NCOMMS1429
Abstract: Understanding resistive (or Joule) heating in fundamental nanoelectronic blocks, such as carbon nanotubes, remains a major challenge, particularly in regard to their structural and thermal variations during prolonged periods of electrical stress. Here we show real-time imaging of the associated effects of Joule heating in the channel of carbon nanotube interconnects. First, electrical contacts to nanotubes entirely filled with a sublimable material are made inside a transmission electron microscope. On exposure to a high current density, resistive hotspots are identified on (or near) the contact points. These later migrate and expand along the carbon nanotube, as indicated by the localized sublimation of the encapsulated material. Using the hotspot edges as markers, it is possible to estimate the internal temperature profiles of the nanotube. Simple and direct, our method provides remarkable spatial and temporal insights into the dynamics of resistive hotspots and millisecond-paced thermal variations occurring inside nanoscaled tubular interconnects.
Pollutant capturing SERS substrate: Porous boron nitride microfibers with uniform silver nanoparticle decoration
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR05625J
Abstract: We designed a novel pollutant capturing surface enhanced Raman spectroscopy (SERS) substrate based on boron nitride microfibers uniformly decorated with silver nanoparticles.
Mg3N2-Ga: Nanoscale Semiconductor–Liquid Metal Heterojunctions inside Graphitic Carbon Nanotubes
Publisher: Wiley
Date: 21-05-2007
Electronic structure of boron nitride cone-shaped nanostructures
Publisher: American Physical Society (APS)
Date: 19-12-2005
Enhanced Field-Emission and Red Lasing of Ordered CdSe Nanowire Branched Arrays
Publisher: American Chemical Society (ACS)
Date: 22-04-2011
DOI: 10.1021/JP200398S
Functional Materials Research at Queensland University of Technology's Centre for Materials Science
Publisher: Wiley
Date: 04-2022
Revealing the conversion mechanism of CuO nanowires during lithiation–delithiation by in situ transmission electron microscopy
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC30643C
Abstract: Being promising candidates for anodes in lithium-ion batteries (LIBs), transition metal oxide anodes utilizing the so-called conversion mechanism principle typically suffer from the severe capacity fading during the 1st cycle of lithiation-delithiation. Herein, we directly investigated these processes using an in idual CuO nanowire anode and constructed a lithium ion battery (LIB) prototype within a transmission electron microscope.
Na0.67 Mn(1-x) Fex O2 Compounds as High-Capacity Cathode Materials for Rechargeable Sodium-Ion Batteries
Publisher: Wiley
Date: 14-12-2021
A Liquid‐Ga‐Filled Carbon Nanotube: A Miniaturized Temperature Sensor and Electrical Switch
Publisher: Wiley
Date: 23-09-2005
Abstract: Temperature control on the nanometer scale is a challenging task in many physical, chemical, and material science applications where small experimental volumes with high temperature gradients are used. The crucial difficulty is reducing the size of temperature sensors while keeping their sensitivity, working temperature range, and, most importantly, their simplicity and accuracy of temperature reading. In this work, we demonstrate the ultimate miniaturization of the classic thermometer using an expanding column of liquid gallium inside a multi-walled C nanotube for precise temperature measurements. We report that electrical conductivity through unfilled nanotube regions is diffusive with a resistance per unit length of approximately 10 kOmega microm(-1), whereas Ga-filled segments of the nanotube show metallic behavior with a low resistance of approximately 100 Omega microm(-1). No noticeable Schottky barrier exists between the nanotube carbon shell and the inner Ga filling. Based on these findings, an in idual carbon nanotube partially filled with liquid Ga is used as a temperature sensor and/or switch. The nanotube's electrical resistance decreases linearly with increasing temperature as the metallic Ga column expands inside the tube channel. In addition, the tube resistance drops sharply when two encapsulated Ga columns approaching each other meet inside the nanotube, producing a switching action that can occur at any predetermined temperature, as the Ga column position inside the nanotube can be effectively pre-adjusted by nanoindentation using an atomic force microscope.
Structural peculiarities of in situ deformation of a multi-walled BN nanotube inside a high-resolution analytical transmission electron microscope
Publisher: Elsevier BV
Date: 02-2007
Microporous materials formed via intercalation of ultrathin coordination polymers in a layered silicate
Publisher: Elsevier BV
Date: 05-2019
Arsenic (V) adsorption on Fe3O4 nanoparticle-coated boron nitride nanotubes
Publisher: Elsevier BV
Date: 07-2011
DOI: 10.1016/J.JCIS.2011.02.071
Abstract: Multiwalled boron nitride nanotubes (BNNTs) functionalized with Fe(3)O(4) nanoparticles (NPs) were used for arsenic removal from water solutions. Sonication followed by a heating process was developed to in situ functionalize Fe(3)O(4) NPs onto a tube surface. A batch of adsorption experiments conducted at neutral pH (6.9) and room temperature (25 °C) and using the developed nanocomposites revealed effective arsenic (V) removal. The Langmuir, Freundlich, and Dubinin-Radushkevich adsorption isotherms were measured for a range of As(V) initial concentrations from 1 to 40 mg/L under the same conditions. The equilibrium data well fitted all isotherms, indicating that the mechanism for As(V) adsorption was a combination of chemical complexation and physical electrostatic attraction with a slight preference for chemisorption. The magnetite NPs functionalized on BNNTs led to a simple and rapid separation of magnetic metal-loaded adsorbents from the treated water under an external magnetic field.
Realization and direct observation of five normal and parametric modes in silicon nanowire resonators by in situ transmission electron microscopy
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NA00373D
Abstract: In situ TEM observation of the 5 th order normal and parametric resonances for precise evaluation of Si NWs' elastic moduli.
MTBE and priority contaminant treatment with high energy electron beam injection
Publisher: Elsevier BV
Date: 11-2002
New Heterogeneous Nanostructured Catalysts Based on Transition Metal Nanoparticles and Hexagonal Boron Nitride
Publisher: Pleiades Publishing Ltd
Date: 11-2021
MoS 2 nanoflowers and their field-emission properties
Publisher: AIP Publishing
Date: 18-03-2003
DOI: 10.1063/1.1563307
Abstract: Elegant three-dimensional MoS2 nanoflowers were uniformly formed via heating a MoO2 thin film in a vapor sulfur atmosphere. Tens to hundreds of petals were self-assembled within a single nanoflower. Each petal, 100–300 nm wide and only several nanometers thick, exhibited a hexagonal structure. The number of petal layers gradually decreased towards the edges, resulting in uniquely thin edges, typically less than 3 nm. The MoS2 nanoflowers appeared to be excellent field emitters displaying a current density of 0.01 and 10 mA/cm2 at macroscopic fields of 4.5–5.5 and 7.6–8.6 V/μm, respectively the electron field emission was consistent with the Fowler–Nordheim theory.
Multifunctional Superelastic Foam-Like Boron Nitride Nanotubular Cellular-Network Architectures
Publisher: American Chemical Society (ACS)
Date: 16-12-2016
Abstract: Construction of cellular architectures has been expected to enhance materials' mechanical tolerance and to stimulate and broaden their efficient utilizations in many potential fields. However, hitherto, there have been rather scarce developments in boron nitride (BN)-type cellular architectures because of well-known difficulties in the syntheses of BN-based structures. Herein, cellular-network multifunctional foams made of interconnective nanotubular hexagonal BN (h-BN) architectures are developed using carbothermal reduction-assisted in situ chemical vapor deposition conversion from N-doped tubular graphitic cellular foams. These ultralight, chemically inert, thermally stable, and robust-integrity (supporting about 25,000 times of their own weight) three-dimensional-BN foams exhibit a 98.5% porosity, remarkable shape recovery (even after cycling compressions with 90% deformations), excellent resistance to water intrusion, thermal diffusion stability, and high strength and stiffness. They remarkably reduce the coefficient of thermal expansion and dielectric constant of polymeric poly(methyl methacrylate) composites, greatly contribute to their thermal conductivity improvement, and effectively limit polymeric composite softening at elevated temperatures. The foams also demonstrate high-capacity adsorption-separation and removal ability for a wide range of oils and organic chemicals in oil/water systems and reliable recovery under their cycling usage as organic adsorbers. These created multifunctional foams should be valuable in many high-end practical applications.
Single-crystalline trumpetlike zinc phosphide nanostructures
Publisher: AIP Publishing
Date: 03-04-2006
DOI: 10.1063/1.2192090
Abstract: Single-crystalline trumpetlike Zn3P2 nanostructures composed of hollow cones supported by nanowires have been prepared via a simple thermochemical method, which utilized ZnS and GaP as the source materials. The as-synthesized nanostructures are composed of single-crystalline Zn3P2 nanowires with diameters of ∼50nm and large diameter hollow cones with diameters increasing from 50nm at the bottom to 600nm at the top. Photoluminescence study of the trumpetlike Zn3P2 nanostructures shows a broad emission centered at ∼585nm at room temperature.
Molten Au/Ge Alloy Migration in Ge Nanowires
Publisher: American Chemical Society (ACS)
Date: 13-04-2015
DOI: 10.1021/ACS.NANOLETT.5B01144
Abstract: Herein, we report time-resolved in situ transmission electron microscopy observation of Au particle melting at a Ge nanowire tip, subsequent forming of Au/Ge alloy liquid, and its migrating within the Ge nanowire. The migration direction and position of the Au/Ge liquid can be controlled by the applied voltage and the migration speed shows a linear deceleration in the nanowire. In a migration model proposed, the relevant dynamic mechanisms (electromigration, thermodiffusion, and viscous force, etc.) are discussed in detail. This work associated with the liquid mass transport in the solid nanowires should provide new insights into the crystal growth, interface engineering, and fabrication of the heterogeneous nanostructure-based devices.
Thermally conductive, electrically insulating and melt-processable polystyrene/boron nitride nanocomposites prepared by in situ reversible addition fragmentation chain transfer polymerization
Publisher: IOP Publishing
Date: 10-12-2014
DOI: 10.1088/0957-4484/26/1/015705
Abstract: Thermally conductive and electrically insulating polymer/boron nitride (BN) nanocomposites are highly attractive for various applications in many thermal management fields. However, so far most of the preparation methods for polymer/BN nanocomposites have usually caused difficulties in the material post processing. Here, an in situ grafting approach is designed to fabricate thermally conductive, electrically insulating and post-melt processable polystyrene (PS)/BN nanosphere (BNNS) nanocomposites by initiating styrene (St) on the surface functionalized BNNSs via reversible addition fragmentation chain transfer polymerization. The nanocomposites exhibit significantly enhanced thermal conductivity. For ex le, at a St/BN feeding ratio of 5:1, an enhancement ratio of 1375% is achieved in comparison with pure PS. Moreover, the dielectric properties of the nanocomposites show a desirable weak dependence on frequency, and the dielectric loss tangent of the nanocomposites remains at a very low level. More importantly, the nanocomposites can be subjected to multiple melt processing to form different shapes. Our method can become a universal approach to prepare thermally conductive, electrically insulating and melt-processable polymer nanocomposites with erse monomers and nanofillers.
Growth of Semiconducting GaN Hollow Spheres and Nanotubes with Very Thin Shells via a Controllable Liquid Gallium–Gas Interface Chemical Reaction
Publisher: Wiley
Date: 23-09-2005
Abstract: An in situ liquid gallium-gas interface chemical reaction route has been developed to synthesize semiconducting hollow GaN nanospheres with very small shell size by carefully controlling the synthesis temperature and the ammonia reaction gas partial pressure. In this process the gallium droplet does not act as a catalyst but rather as a reactant and a template for the formation of hollow GaN structures. The diameter of the synthesized hollow GaN spheres is typically 20-25 nm and the shell thickness is 3.5-4.5 nm. The GaN nanotubes obtained at higher synthesis temperatures have a length of several hundreds of nanometers and a wall thickness of 3.5-5.0 nm. Both the hollow GaN spheres and nanotubes are polycrystalline and are composed of very fine GaN nanocrystalline particles with a diameter of 3.0-3.5 nm. The room-temperature photoluminescence (PL) spectra for the synthesized hollow GaN spheres and nanotubes, which have a narrow size distribution, display a sharp, blue-shifted band-edge emission peak at 3.52 eV (352 nm) due to quantum size effects.
Intrinsic and Defect-Related Elastic Moduli of Boron Nitride Nanotubes As Revealed by
Publisher: American Chemical Society (ACS)
Date: 02-07-2019
DOI: 10.1021/ACS.NANOLETT.9B01170
Abstract: Boron nitride nanotubes (BNNTs) are promising for mechanical applications owing to the high modulus, high strength, and inert chemical nature. However, up to now, precise evaluation of their elastic properties and their relation to defects have not been experimentally established. Herein, the intrinsic elastic modulus of BNNTs and its dependence on intrinsic and deliberately irradiation-induced extrinsic defects have been studied via an electric-field-induced high-order resonance technique inside a high-resolution transmission electron microscope (HRTEM). Resonances up to fourth order for normal modes and third order for parametric modes have been initiated in the cantilevered tubes, and the recorded frequencies are well consistent with the theoretical calculations with a discrepancy of ∼1%. The elastic moduli of the BNNTs measured from high-order resonance is about 906.2 GPa on average, with a standard deviation of 9.3%, which is found to be closely related to the intrinsic defect as cavities in the nanotube walls. Furthermore, electron irradiation in HRTEM has been used to study the effects of defects to elastic moduli and to evaluate the radiation resistance of the BNNTs. Along with an increase in the irradiation dose, the outer diameter has linearly reduced due to the knock-on effects. A defective shell with nearly constant thickness has been formed on the outer surface, and as a result, the elastic modulus decreases gradually to ∼662.9 GPa, which is still 3 times that of steel. Excellent intrinsic elastic properties and decent radiation-resistance prove that BNNTs could be a material of choice for applications in extreme environments, such as those existing in space.
Large-scale fabrication of boron nitride nanohorn
Publisher: AIP Publishing
Date: 08-2005
DOI: 10.1063/1.2009056
Abstract: Boron nitride nanohorns (BNNHs) are synthesized in large scale. Their morphology and structure were investigated by scanning electron microscopy and transmission electron microscopy. The hollow conical structure and particular aggregation behavior are revealed. Cathodoluminescence measurement is performed and ultraviolet light emission is observed, which indicates the potential applications of BNNHs in optical devices.
Optical and Optoelectronic Property Analysis of Nanomaterials inside Transmission Electron Microscope
Publisher: Wiley
Date: 13-09-2017
Abstract: In situ transmission electron microscopy (TEM) allows one to investigate nanostructures at high spatial resolution in response to external stimuli, such as heat, electrical current, mechanical force and light. This review exclusively focuses on the optical, optoelectronic and photocatalytic studies inside TEM. With the development of TEMs and specialized TEM holders that include in situ illumination and light collection optics, it is possible to perform optical spectroscopies and erse optoelectronic experiments inside TEM with simultaneous high resolution imaging of nanostructures. Optical TEM holders combining the capability of a scanning tunneling microscopy probe have enabled nanomaterial bending/stretching and electrical measurements in tandem with illumination. Hence, deep insights into the optoelectronic property versus true structure and its dynamics could be established at the nanometer-range precision thus evaluating the suitability of a nanostructure for advanced light driven technologies. This report highlights systems for in situ illumination of TEM s les and recent research work based on the relevant methods, including nanomaterial cathodoluminescence, photoluminescence, photocatalysis, photodeposition, photoconductivity and piezophototronics.
Carbon Nanotubes as Nanoreactors for Fabrication of Single-Crystalline Mg3N2 Nanowires
Publisher: American Chemical Society (ACS)
Date: 29-04-2006
DOI: 10.1021/NL060245V
Abstract: Due to fast decomposition of Mg3N2 in the presence of water in the atmosphere (Mg3N2+6H2O-->3Mg(OH)2+2NH3), the synthesis of single-crystalline Mg3N2 nanowires has been a challenge. Here, we demonstrate that carbon nanotubes may serve as nanoreactors for a simple thermal reaction process resulting in the first fabrication of high-quality, large-yield, single-crystalline Mg3N2 nanowires. The Mg3N2 nanowires are homogeneously sheathed over their entire lengths with very thin graphitic carbon tubular layers, which effectively prevent their decomposition (even when the s les are put into water or exposed to atmosphere for several months). We have systematically analyzed for the first time the Mg3N2 nanomaterial by means of transmission electron microscopy (TEM), high-resolution TEM, and electron diffraction. Successful fabrication of carbon sheath protected Mg3N2 nanowires may promote further experimental studies on their crystal structures and properties.
Fabrication and application of BN nanoparticles, nanosheets and their nanohybrids
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR05027A
Abstract: Fabrication, properties and potentials of BN nanoparticles, nanosheets and their metallic, ceramic and polymeric composites are reviewed in terms of catalytic, medical, antibacterial, structural and tribological applications based on the most recent literature.
Bio-Impedance Measurement Optimization for High-Resolution Carotid Pulse Sensing
Publisher: MDPI AG
Date: 25-02-2021
DOI: 10.3390/S21051600
Abstract: Continuous hemodynamic monitoring is important for long-term cardiovascular healthcare, especially in hypertension. The impedance plethysmography (IPG) based carotid pulse sensing is a non-invasive diagnosis technique for measuring pulse signals and further evaluating the arterial conditions of the patient such as continuous blood pressure (BP) monitoring. To reach the high-resolution IPG-based carotid pulse detection for cardiovascular applications, this study provides an optimized measurement parameter in response to obvious pulsation from the carotid artery. The influence of the frequency of excitation current, electrode cross-sectional area, electrode arrangements, and physiological site of carotid arteries on IPG measurement resolution was thoroughly investigated for optimized parameters. In this study, the IPG system was implemented and installed on the subject’s neck above the carotid artery to evaluate the measurement parameters. The measurement results within 6 subjects obtained the arterial impedance variation of 2137 mΩ using the optimized measurement conditions, including excitation frequency of 50 kHz, a smaller area of 2 cm2, electrode spacing of 4 cm and 1.7 cm for excitation and sensing functions, and location on the left side of the neck. The significance of this study demonstrates an optimized measurement methodology of IPG-based carotid pulse sensing that greatly improves the measurement quality in cardiovascular monitoring.
High-yield boron nitride nanosheets from ‘chemical blowing’: towards practical applications in polymer composites
Publisher: IOP Publishing
Date: 20-07-2012
DOI: 10.1088/0953-8984/24/31/314205
Abstract: An improved 'chemical blowing' route presuming atmospheric-pressure pre-treatment and moderate heating rate of designated precursors was developed to synthesize ultra-thin boron nitride (BN) nanosheets with high yield and large lateral dimensions. The yield reached as high as 40 wt% with respect to raw materials (ammonia borane). The strong oxygen-related ultraviolet luminescence together with a blue emission of these BN nanosheets was then documented and analyzed. This implies potential applications in solid-state lighting, ultraviolet lasing and full-color luminescence. Mechanical strength of different polymeric composites with a small fraction of BN nanosheet fillers was dramatically increased by tens of per cent, while high transparency of composite materials was still maintained in the visible optical range. The increased yield and reduced cost of BN nanosheets should promote their wide practical applications in various composites.
Sb2O3nanobelt networks for excellent visible-light-range photodetectors
Publisher: IOP Publishing
Date: 11-03-2011
DOI: 10.1088/0957-4484/22/16/165704
Abstract: Excellent photoconductive properties have been found in Sb(2)O(3) nanobelts synthesized by a surfactant-assisted solvothermal method. Visible-light photodetectors have been designed from Sb(2)O(3) nanobelt networks using micrometer-wide gold wires as masks. Photodetectors show high sensitivity to visible light, high stability, and reproducibility. Fast response and decay times (<0.3 s) are comparable or even better than these parameters in many other metal oxide nanoscale photodetectors. The dominant mechanism of excellent photoconductivity is attributed to the barrier height modulations in the nanobelt-to-nanobelt contact regions. These results demonstrate that Sb(2)O(3) nanobelt networks can indeed serve as high-performance photodetectors in the visible light range.
Heterostructures and superlattices in one-dimensional nanoscale semiconductors
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B902300C
Iron in NiAl intermetallic compound: atomic arrangements and associated magnetic properties and electronic structures
Publisher: Elsevier BV
Date: 1995
Strategic design of Fe and N co-doped hierarchically porous carbon as superior ORR catalyst: from the perspective of nanoarchitectonics
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2SC02726G
Abstract: This study elucidates the role of each class of nanopore by in-depth electrochemical analysis of three types of ZIF-8-derived carbons. Also, engineered co-doping of Fe and N is found essential to selectively form Fe–N x sites in the carbon matrix.
Polystyrene sphere-assisted one-dimensional nanostructure arrays: synthesis and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM02230F
Amorphous Phosphorus/Nitrogen-Doped Graphene Paper for Ultrastable Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 29-02-2016
DOI: 10.1021/ACS.NANOLETT.6B00057
Abstract: As the most promising anode material for sodium-ion batteries (SIBs), elemental phosphorus (P) has recently gained a lot of interest due to its extraordinary theoretical capacity of 2596 mAh/g. The main drawback of a P anode is its low conductivity and rapid structural degradation caused by the enormous volume expansion (>490%) during cycling. Here, we redesigned the anode structure by using an innovative methodology to fabricate flexible paper made of nitrogen-doped graphene and amorphous phosphorus that effectively tackles this problem. The restructured anode exhibits an ultrastable cyclic performance and excellent rate capability (809 mAh/g at 1500 mA/g). The excellent structural integrity of the novel anode was further visualized during cycling by using in situ experiments inside a high-resolution transmission electron microscope (HRTEM), and the associated sodiation/desodiation mechanism was also thoroughly investigated. Finally, density functional theory (DFT) calculations confirmed that the N-doped graphene not only contributes to an increase in capacity for sodium storage but also is beneficial in regards to improved rate performance of the anode.
Al − BN interaction in a high-strength lightweight Al/BN metal-matrix composite: Theoretical modelling and experimental verification
Publisher: Elsevier BV
Date: 04-2019
Environmental Benefits and Burdens of Phosphorus Recovery from Municipal Wastewater
Publisher: American Chemical Society (ACS)
Date: 10-07-2015
DOI: 10.1021/ES505102V
Abstract: The environmental benefits and burdens of phosphorus recovery in four centralized and two decentralized municipal wastewater systems were compared using life cycle assessment (LCA). In centralized systems, phosphorus recovered as struvite from the solids dewatering liquid resulted in an environmental benefit except for the terrestrial ecotoxicity and freshwater eutrophication impact categories, with power and chemical use offset by operational savings and avoided fertilizer production. Chemical-based phosphorus recovery, however, generally required more resources than were offset by avoided fertilizers, resulting in a net environmental burden. In decentralized systems, phosphorus recovery via urine source separation reduced the global warming and ozone depletion potentials but increased terrestrial ecotoxicity and salinization potentials due to application of untreated urine to land. Overall, mineral depletion and eutrophication are well-documented arguments for phosphorus recovery however, phosphorus recovery does not necessarily present a net environmental benefit. While avoided fertilizer production does reduce potential impacts, phosphorus recovery does not necessarily offset the resources consumed in the process. LCA results indicate that selection of an appropriate phosphorus recovery method should consider both local conditions and other environmental impacts, including global warming, ozone depletion, toxicity, and salinization, in addition to eutrophication and mineral depletion impacts.
Multimodal luminescent-magnetic boron nitride nanotubes@NaGdF4:Eu structures for cancer therapy
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4CC00990H
Abstract: Boron nitride nanotubes@NaGdF4:Eu composites with core@shell structures were fabricated to trace and manipulate BNNTs in vitro .
Morphology-tunable In2Se3 nanostructures with enhanced electrical and photoelectrical performances via sulfur doping
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0JM01013H
Rapid and Direct Conversion of Graphite Crystals into High‐Yielding, Good‐Quality Graphene by Supercritical Fluid Exfoliation
Publisher: Wiley
Date: 02-06-2010
Abstract: Graphene has attracted a great deal of attention in recent years due to its unusual electronic, mechanical, and thermal properties. Exploiting graphene properties in a variety of applications requires a chemical approach for the large-scale production of high-quality, processable graphene sheets (GS), which has remained an unanswered challenge. Herein, we report a rapid one-pot supercritical fluid (SCF) exfoliation process for the production of high-quality, large-scale, and processable graphene for technological applications. Direct high-yield conversion of graphite crystals to GS is possible under SCF conditions because of the high diffusivity and solvating power of SCFs, such as ethanol, N-methyl-pyrrolidone (NMP), and DMF. For the first time, we report a one-pot direct conversion of graphite crystals to a high yield of graphene sheets in which about 90-95% of the exfoliated sheets are or = 10 layers.
Effect of silicidation on the electrical characteristics of polycrystalline-SiGe Schottky diode
Publisher: Elsevier BV
Date: 05-2006
Self-Assembled Highly Faceted Wurtzite-Type ZnS Single-Crystalline Nanotubes with Hexagonal Cross-Sections
Publisher: Wiley
Date: 18-08-2005
Multiscale Buffering Engineering in Silicon–Carbon Anode for Ultrastable Li-Ion Storage
Publisher: American Chemical Society (ACS)
Date: 19-08-2019
Abstract: Silicon-carbon (Si-C) hybrids have been proven to be the most promising anodes for the next-generation lithium-ion batteries (LIBs) due to their superior theoretical capacity (∼4200 mAh g
Relative impact of fouling and cleaning on PVDF membrane hydraulic performances
Publisher: Elsevier BV
Date: 04-2012
Tapered Carbon Nanotubes from Activated Carbon Powders
Publisher: Wiley
Date: 19-01-2006
Mechanical properties of decellularized extracellular matrix coated with TiCaPCON film
Publisher: IOP Publishing
Date: 22-06-2017
Synthesis, Structure, and Multiply Enhanced Field-Emission Properties of Branched ZnS Nanotube−In Nanowire Core−Shell Heterostructures
Publisher: American Chemical Society (ACS)
Date: 29-04-2008
DOI: 10.1021/NN800013B
Abstract: We report on the synthesis of a novel core-shell metal-semiconductor heterostructure where In forms the core nanowire and wurtzite ZnS forms the shell nanotube. In addition, controlled reaction conditions result in the growth of secondary quasi-aligned ZnS nanowires as numerous branches on the shell nanotubes. These hierarchical architectures are attractive for two reasons: (i) the sharp and quasi-aligned ZnS tips of the nanostructures are potential field-emitters and (ii) since In in bulk form is superconducting the synthesis of core In nanowires should now pave the way for further investigations on magnetic versus transport behavior in type-1 superconductors at the nanoscale. The synthesis could be achieved by employing a rapidly heating carbothermal chemical vapor deposition technique and a high reaction temperature. Transmission electron microscopy reveals that the core In nanowires are single crystals, whereas, within a hierarchical shell, the stem and the branches are separated with a crystalline interface. Field-emission measurements demonstrate remarkably large field enhancement which is explained on the basis of a sequential stepwise enhancement mechanism involving the consecutive stem and branch contributions. The present new nanoarchitectures are envisaged to be an important candidate for potential nanoelectronic devices.
High-pressure effects on boron nitride multi-walled nanotubes: An X-ray diffraction study
Publisher: Elsevier BV
Date: 12-2008
Growth and Field Emission of Hierarchical Single-Crystalline Wurtzite AlN Nanoarchitectures
Publisher: Wiley
Date: 06-01-2005
Dually-functionalized boron nitride nanotubes to target glioblastoma multiforme
Publisher: Elsevier BV
Date: 06-2020
High-Pressure Silicon Phase Created by High Power Ultrashort Laser Pulse at the Intensity of 1019 W/cm2
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.P1_19
Abstract: Material states formed by high-power laser demonstrate new pathways for engineering polymorphs with novel optoelectronic properties. We present the observation of silicon phases only seen until now in laboratory experiments by ultrashort laser confined microexplosion.
Boron nitride nanostructures formed by ultra-high-repetition rate laser ablation
Publisher: Elsevier BV
Date: 08-2003
Synthesis of carbon nanotubes below room temperature
Publisher: Elsevier BV
Date: 2001
Correction to Real-Time In Situ HRTEM-Resolved Resistance Switching of Ag2S Nanoscale Ionic Conductor
Publisher: American Chemical Society (ACS)
Date: 02-2016
Wurtzite-type faceted single-crystalline GaN nanotubes
Publisher: AIP Publishing
Date: 27-02-2006
DOI: 10.1063/1.2182065
Abstract: We report on the direct fabrication of single-crystalline wurtzite-type hexagonal GaN nanotubes via a newly designed, controllable, and reproducible chemical thermal-evaporation process. The nanotubes are single crystalline, have one end closed, an average outer diameter of ∼300nm, an inner diameter of ∼100nm, and a wall thickness of ∼100nm. The structure and morphology of the tubes are characterized using a scanning electron microscope and a transmission electron microscope. The cathodoluminescence of in idual nanotubes is also investigated. The growth mechanism, formation kinetics, and crystallography of GaN nanotubes are finally discussed.
Asymmetric tungsten oxide nanobrushes via oriented attachment and Ostwald ripening
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CE00988A
Visualizing nanoscale heat pathways
Publisher: Elsevier BV
Date: 10-2018
ZnO and ZnS Nanostructures: Ultraviolet-Light Emitters, Lasers, and Sensors
Publisher: Informa UK Limited
Date: 30-11-2009
Boron nitride nanotubes as nanocrucibles for morphology and phase transformations in encapsulated nanowires of the Mg–O system
Publisher: Elsevier BV
Date: 06-2004
Tubular Carbon Nano-/Microstructures Synthesized from Graphite Powders by an in Situ Template Process
Publisher: American Chemical Society (ACS)
Date: 18-05-2006
DOI: 10.1021/JP0618274
Abstract: Through the use of commercial graphite powders as the carbon sources, a variety of interesting tubular carbon nano- and microstructures, such as networked carbon nanotubes, aligned carbon microtubes with hexagonal cross-sections, aligned tapered carbon tubes, and hollow carbon microhorns, have been successfully synthesized. As-grown tubular carbon structures were characterized using scanning electron microscopy, transmission electron microscopy, and X-ray energy-dispersive spectroscopy. An in situ template mechanism was proposed to explain the possible growth process. The vibrational properties of the synthesized tubular carbon structures were also studied by Raman spectroscopy.
Boron Dopants in Red-Emitting B and N Co-Doped Carbon Quantum Dots Enable Targeted Imaging of Lysosomes
Publisher: American Chemical Society (ACS)
Date: 24-03-2023
Synthesis, characterization and field-emission properties of bamboo-like β-SiC nanowires
Publisher: IOP Publishing
Date: 20-06-2006
DOI: 10.1088/0957-4484/17/14/019
Abstract: Single-crystalline bamboo-like beta-SiC nanowires with hexagonal cross-sections were synthesized by thermal evaporation of mixed SiO+C+GaN powders in an Ar atmosphere. The as-synthesized nanowires were studied by x-ray diffraction, scanning electron microscopy and transmission electron microscopy. Studies found that the as-synthesized SiC nanowires are composed of hexagonal stems decorated with larger diameter knots along their whole length with the [Formula: see text] growth direction. The growth of bamboo-like SiC nanowires is governed by the vapour-liquid-solid mechanism. Field-emission properties of the peculiar nanostructures were also explored, showing a turn-on field of about 10.1 V microm(-1).
Field emission from individual B–C–N nanotube rope
Publisher: AIP Publishing
Date: 30-07-2002
DOI: 10.1063/1.1497194
Abstract: The field-emission characteristics of in idual ropes made of B–C–N nanotubes were measured in situ in a low-energy electron point source microscope. The tungsten field emission tip of the microscope was used as a movable electrode, approaching the rope, and acting as an anode during field-emission measurements. The atomic structure and chemical composition of the ropes were analyzed by high-resolution transmission electron microscopy and electron energy-loss spectroscopy. The tubes assembled within the ropes typically revealed open-tip ends, a small number of layers and zigzag chirality. We found that the field-emission properties of the B–C–N nanotube ropes are competitive with conventional C nanotubes, with the expected additional benefit that the B–C–N ropes exhibit higher environmental stability.
N‐Doped Graphene‐SnO2 Sandwich Paper for High‐Performance Lithium‐Ion Batteries
Publisher: Wiley
Date: 17-04-2012
Effective precursor for high yield synthesis of pure BN nanotubes
Publisher: Elsevier BV
Date: 07-2005
Hybrid two-dimensional materials in rechargeable battery applications and their microscopic mechanisms
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CS00937E
Abstract: Advances in two-dimensional (2D) hybrid nanomaterials in electrochemical energy storage and their microscopic mechanisms are summarized and reviewed.
Crystallography-Derived Young's Modulus and Tensile Strength of AlN Nanowires as Revealed by in Situ Transmission Electron Microscopy.
Publisher: American Chemical Society (ACS)
Date: 21-02-2019
DOI: 10.1021/ACS.NANOLETT.9B00263
Abstract: Aluminum nitride (AlN) has a unique combination of properties, such as high chemical and thermal stability, nontoxicity, high melting point, large energy band gap, high thermal conductivity, and intensive light emission. This combination makes AlN nanowires (NWs) a prospective material for optoelectronic and field-emission nanodevices. However, there has been very limited information on mechanical properties of AlN NWs that is essential for their reliable utilization in modern technologies. Herein, we thoroughly study mechanical properties of in idual AlN NWs using direct, in situ bending and tensile tests inside a high-resolution TEM. Overall, 22 in idual NWs have been tested, and a strong dependence of their Young's moduli and ultimate tensile strengths (UTS) on their growth axis crystallographic orientation is documented. The Young's modulus of NWs grown along the [101̅1] orientation is found to be in a range 160-260 GPa, whereas for those grown along the [0002] orientation it falls within a range 350-440 GPa. In situ TEM tensile tests demonstrate the UTS values up to 8.2 GPa for the [0002]-oriented NWs, which is more than 20 times larger than that of a bulk AlN compound. Such properties make AlN nanowires a highly promising material for the reinforcing applications in metal matrix and other composites. Finally, experimental results were compared and verified under a density functional theory simulation, which shows the pronounced effect of growth axis on the AlN NW mechanical behavior. The modeling reveals that with an increasing NW width the Young's modulus tends to approach the elastic constants of a bulk material.
Defects and Deformation of Boron Nitride Nanotubes Studied by Joint Nanoscale Mechanical and Infrared Near-Field Microscopy
Publisher: American Chemical Society (ACS)
Date: 19-01-2016
Shape- and Size-controlled Growth of ZnS Nanostructures
Publisher: American Chemical Society (ACS)
Date: 24-05-2007
DOI: 10.1021/JP071556C
Single‐Crystalline In2O3 Nanotubes Filled with In
Publisher: Wiley
Date: 09-04-2003
Abstract: Single‐crystalline In 2 O 3 nanotubes with cubic structure were synthesized via a physical vapor depostion process. The nanotubes grew along the 〈111〉 direction and were continuously filled with metallic In (see Figure). Photoluminescence measurement results displayed strong orange emission. Indium‐filled In 2 O 3 nanotubes represent an exciting system and offer great potential for application in electronic devices or “nanothermometers”.
A creativity-led rural renaissance? Amenity-led migration, the creative turn and the uneven development of rural Australia
Publisher: Elsevier BV
Date: 10-2013
Caging tin oxide in three-dimensional graphene networks for superior volumetric lithium storage
Publisher: Springer Science and Business Media LLC
Date: 26-01-2018
DOI: 10.1038/S41467-017-02808-2
Abstract: Tin and its compounds hold promise for the development of high-capacity anode materials that could replace graphitic carbon used in current lithium-ion batteries. However, the introduced porosity in current electrode designs to buffer the volume changes of active materials during cycling does not afford high volumetric performance. Here, we show a strategy leveraging a sulfur sacrificial agent for controlled utility of void space in a tin oxide/graphene composite anode. In a typical synthesis using the capillary drying of graphene hydrogels, sulfur is employed with hard tin oxide nanoparticles inside the contraction hydrogels. The resultant graphene-caged tin oxide delivers an ultrahigh volumetric capacity of 2123 mAh cm –3 together with good cycling stability. Our results suggest not only a conversion-type composite anode that allows for good electrochemical characteristics, but also a general synthetic means to engineering the packing density of graphene nanosheets for high energy storage capabilities in small volumes.
Self-templated fabrication of hierarchical hollow manganese-cobalt phosphide yolk-shell spheres for enhanced oxygen evolution reaction
Publisher: Elsevier BV
Date: 02-2021
Insights on pulsed bubble control of membrane fouling: Effect of bubble size and frequency
Publisher: Elsevier BV
Date: 05-2018
Metal ion implantation of multiwalled boron nitride nanotubes
Publisher: Elsevier BV
Date: 09-2012
Weak morphology dependent valence band structure of boron nitride
Publisher: AIP Publishing
Date: 02-08-2013
DOI: 10.1063/1.4817430
Abstract: We report a hard X-ray photoelectron spectroscopy (HX-PES) investigation on valence band structure of Boron Nitrides (BN) having different morphologies, including nanosheets, nanotubes, and micro-sized particles. Very weak morphology/valence band structure dependence was observed. For each case, the B-N π-band overlapping with σ-band between 0 to −12.5 eV and the s-band below −15 eV were identified. No obvious morphology-induced band shifts and intensity variations were observed. First-principles calculations based on density functional theory were performed and the results were compared with the experimental data. This theoretical analysis well explains the weak morphology dependent valence band spectra of BN nanomaterials obtained during HX-PES measurements.
Cobalt Hydroxide/Oxide Hexagonal Ring–Graphene Hybrids through Chemical Etching of Metal Hydroxide Platelets by Graphene Oxide: Energy Storage Applications
Publisher: American Chemical Society (ACS)
Date: 20-02-2014
DOI: 10.1021/NN406480G
Abstract: The reaction of β-Co(OH)2 hexagonal platelets with graphite oxide in an aqueous colloidal dispersion results in the formation of β-Co(OH)2 hexagonal rings anchored to graphene oxide layers. The interaction between the basic hydroxide layers and the acidic groups on graphene oxide induces chemical etching of the hexagonal platelets, forming β-Co(OH)2 hexagonal rings. On heating in air or N2, the hydroxide hybrid is morphotactically converted to porous Co3O4/CoO hexagonal ring-graphene hybrids. Porous NiCo2O4 hexagonal ring-graphene hybrid is also obtained through a similar process starting from β-Ni0.33Co0.67(OH)2 platelets. As electrode materials for supercapacitors or lithium-ion batteries, these materials exhibit a large capacity, high rate capability, and excellent cycling stability.
Synthesis and Field-Emission Properties of Ga2O3−C Nanocables
Publisher: American Chemical Society (ACS)
Date: 11-2004
DOI: 10.1021/CM048909U
Hollow boron nitride nanospheres as boron reservoir for prostate cancer treatment
Publisher: Springer Science and Business Media LLC
Date: 06-01-2017
DOI: 10.1038/NCOMMS13936
Abstract: High global incidence of prostate cancer has led to a focus on prevention and treatment strategies to reduce the impact of this disease in public health. Boron compounds are increasingly recognized as preventative and chemotherapeutic agents. However, systemic administration of soluble boron compounds is h ered by their short half-life and low effectiveness. Here we report on hollow boron nitride (BN) spheres with controlled crystallinity and boron release that decrease cell viability and increase prostate cancer cell apoptosis. In vivo experiments on subcutaneous tumour mouse models treated with BN spheres demonstrated significant suppression of tumour growth. An orthotopic tumour growth model was also utilized and further confirmed the in vivo anti-cancer efficacy of BN spheres. Moreover, the administration of hollow BN spheres with paclitaxel leads to synergetic effects in the suppression of tumour growth. The work demonstrates that hollow BN spheres may function as a new agent for prostate cancer treatment.
Engineering Platinum–Oxygen Dual Catalytic Sites via Charge Transfer towards Highly Efficient Hydrogen Evolution
Publisher: Wiley
Date: 13-08-2020
Abstract: A dual‐site catalyst allows for a synergetic reaction in the close proximity to enhance catalysis. It is highly desirable to create dual‐site interfaces in single‐atom system to maximize the effect. Herein, we report a cation‐deficient electrostatic anchorage route to fabricate an atomically dispersed platinum–titania catalyst (Pt 1 O1 /Ti 1− x O 2 ), which shows greatly enhanced hydrogen evolution activity, surpassing that of the commercial Pt/C catalyst in mass by a factor of 53.2. Operando techniques and density functional calculations reveal that Pt 1 O1 /Ti 1− x O 2 experiences a Pt−O dual‐site catalytic pathway, where the inherent charge transfer within the dual sites encourages the jointly coupling protons and plays the key role during the Volmer–Tafel process. There is almost no decay in the activity of Pt 1 O1 /Ti 1− x O 2 over 300 000 cycles, meaning 30 times of enhancement in stability compared to the commercial Pt/C catalysts (10 000 cycles).
Electrical Transport and High‐Performance Photoconductivity in Individual ZrS2 Nanobelts
Publisher: Wiley
Date: 20-08-2010
Abstract: In idual ZrS(2)-nanobelt field-effect transistors were fabricated using a photolithography process. Temperature-dependent electrical transport revealed different electrical conductivity mechanism at different working temperature regions. ZrS(2)-nanobelt photodetectors demonstrated a high-performance visible-light photoconductivity.
Optimizing hollow fibre nanofiltration for organic matter rich lake water
Publisher: MDPI AG
Date: 30-09-2016
DOI: 10.3390/W8100430
Transmission electron microscope as an ultimate tool for nanomaterial property studies
Publisher: Oxford University Press (OUP)
Date: 07-12-2012
Abstract: In this review, a non-standard application of high-resolution transmission electron microscope (HRTEM), namely the creation of so-called NanoLaboratory for the nanomaterial property studies within its pole piece, is presented. The most modern research trends with respect to nanotube, graphene and nanowire, as well as electrical, mechanical and electromechanical properties are demonstrated. In addition, the unique possibilities of modeling real technological processes inside HRTEM, for ex le, the performance of Li-ion batteries, are illustrated. The contribution particularly highlights the recent research endeavors of our Tsukuba group in line with all the above-mentioned directions of in situ TEM.
Electron Emission from Individual Graphene Nanoribbons Driven by Internal Electric Field
Publisher: American Chemical Society (ACS)
Date: 29-11-2011
DOI: 10.1021/NN204172W
Abstract: Electron emission from in idual graphene nanoribbons (GNRs) driven by an internal electric field was studied for the first time inside a high resolution transmission electron microscope equipped with a state-of-art scanning tunneling microscope s le holder with independent twin probes. Electrons were driven out from in idual GNRs under an internal driving voltage of less than 3 V with an emission current increasing exponentially with the driving voltage. The emission characteristics were analyzed by taking into account monatomic thickness of GNRs. While deviating from the two-dimensional Richardson equation for thermionic emission, they were well described by the recently proposed by us phonon-assisted electron emission model. Different from widely studied field electron emission from graphene edges, electrons were found to be emitted perpendicularly to the atomic graphene surfaces with an emission density as high as 12.7 A/cm(2). The internally driven electron emission is expected to be less sensitive to the microstructures of an emitter as compared to field emission. The low driving voltage, high emission density, and internal field driving character make the regarded electron emission highly promising for electron source applications.
Synthesis, structural and chemical analysis, and electrical property measurements of compound nanotubes in the B-C-N system
Publisher: AIP
Date: 2003
DOI: 10.1063/1.1628051
In situ
TEM
measurements of mechanical properties of individual spherical
BN
nanoparticles of different morphologies
Publisher: Wiley
Date: 20-12-2016
DOI: 10.1002/9783527808465.EMC2016.6872
Abstract: Boron nitride (BN) nanostructures exhibit excellent mechanical properties. For ex le, the in situ tensile tests on in idual BN nanotubes (BNNTs), which were conducted in situ in a transmission electron microscope (TEM) column, demonstrated the strength and Young's modulus of ~33 GPa and ~1.3 TPa, respectively [1].Such superb mechanical properties of BN nanostructures make them very attractive materials as a reinforcement phase in lightweight composites. Besides nanotubes, nano‐BN can be obtained in the form of spherical nanoparticles (BNNPs) with different morphologies – solid or hollow, with smooth or rough surfaces. High electrical and chemical resistance, thermal stability and biocompatibility of BNNPs were reported but their mechanical properties have not been detailed yet. BNNPs in the present study were synthesized by CVD technique. By changing technological parameters of CVD process particles of various morphologies were obtained. For each type of in idual BNNPs in situ compression tests were accomplished in a TEM column. As‐synthesized BNNPs were dispersed in acetone and the suspension was placed onto a Si wafer. The truncated cone‐like shape indenter with a diameter of top circle of 1 μm was used. Elastic moduli were determined for all tested particles. The obtained results (Fig. 1) show that the high strength enables the hollow spherical BNNPs to withstand a considerable compressive deformation before failure (up to 50% of the hollow particle diameter). The structures also demonstrated a high percentage of elastic recovery.
Characterization, cathodoluminescence and field-emission properties of morphology-tunable CdS micro/nanostructures
Publisher: IEEE
Date: 2010
NiCo2O4Nanostructures as a Promising Alternative for NiO Photocathodes in p-Type Dye-Sensitized Solar Cells with High Efficiency
Publisher: No publisher found
Date: 2014
Engineering sulfur vacancies and impurities in NiCo2S4 nanostructures toward optimal supercapacitive performance
Publisher: Elsevier BV
Date: 08-2016
Structural characterization and cathodoluminescence of individual BN layers-sheathed CaS:Eu nanowires
Publisher: IEEE
Date: 2010
Revealing the Anomalous Tensile Properties of WS2 Nanotubes by in Situ Transmission Electron Microscopy
Publisher: American Chemical Society (ACS)
Date: 25-02-2013
DOI: 10.1021/NL304244H
Abstract: Mechanical properties and fracture behaviors of multiwalled WS2 nanotubes produced by large scale fluidized bed method were investigated under uniaxial tension using in situ transmission electron microscopy probing these were directly correlated to the nanotube atomic structures. The tubes with the average outer diameter ∼40 nm sustained tensile force of ∼2949 nN and revealed fracture strength of ∼11.8 GPa. Surprisingly, these rather thick WS2 nanotubes could bear much higher loadings than the thin WS2 nanotubes with almost "defect-free" structures studied previously. In addition, the fracture strength of the "thick" nanotubes did not show common size dependent degradation when the tube diameters increased from ∼20 to ∼60 nm. HRTEM characterizations and real time observations revealed that the anomalous tensile properties are related to the intershell cross-linking and geometric constraints from the inverted cone-shaped tube cap structures, which resulted in the multishell loading and fracturing.
Protrusions or holes in graphene: Which is the better choice for sodium ion storage?
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7EE00329C
Abstract: The introduction of protrusions through P-doping into graphene is an effective strategy to enhance electrochemical performances in SIBs.
Unipolar assembly of zinc oxide rods manifesting polarity-driven collective luminescence
Publisher: Proceedings of the National Academy of Sciences
Date: 19-07-2010
Abstract: Oriented assemblies of small crystals forming larger structures are common in nature and crucial for forthcoming technologies as they circumvent the difficulties of structural manipulation at microscopic scale. We have discovered two distinctive concentric assemblies of zinc oxide rods, wherein each rod has an intrinsically positive and a negative polar end induced by the noncentrosymmetric arrangement of Zn and O atoms. All the rods in a single assembly emanate out of a central core maintaining a single polar direction. Due to growth along the two polar surfaces with different atomic arrangements, these assemblies are distinct in their intrinsic properties and exhibit strong UV luminescence in the exterior of Zn-polar assemblies, unlike the O-polar assemblies. Although novel applications can be envisioned, these observations suggest that hierarchical organization with respect to internal asymmetry might be widespread in natural crystal assemblies.
Interplay between remote single-atom active sites triggers speedy catalytic oxidation
Publisher: Elsevier BV
Date: 11-2022
Improved TiO2 Photocatalytic Reduction by the Intrinsic Electrostatic Potential of BN Nanotubes
Publisher: Wiley
Date: 29-04-2010
Abstract: We describe the synthesis of novel nanocrystalline TiO(2) closely attached to BN nanotubes (BNNTs). The method involves the reaction of Ti(3+) with the oxidized radicals BN-H(+) to form BN-Ti(4+) bonds first, and then in situ hydrolytic conversion of the attached Ti(4+) into TiO(2). The designed reaction was carried out in a strongly acidic ethanol solution to ensure that the TiO(2) forms on the BNNT surface rather than in solution. We also report the improved photocatalytic reduction properties of TiO(2) when functionalized on BNNT surfaces and take advantage of the strong underlying electrostatic potential of the high-purity nanotubes.
Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles
Publisher: Wiley
Date: 17-11-2008
Erosion Resistance of Iron-Boron Nitride Composite Plating to Molten Lead-Free Solder
Publisher: Japan Institute of Metals
Date: 08-2022
Effect of Fe3+ for Ru4+ substitution in disordered Na1. 33Ru0. 67O2 cathode for sodium-ion batteries: Structural and electrochemical characterizations
Publisher: Elsevier BV
Date: 12-2019
Multibranched Junctions of Carbon Nanotubes via Cobalt Particles
Publisher: Wiley
Date: 26-11-2009
Compressive properties of hollow BN nanoparticles: theoretical modeling and testing using a high-resolution transmission electron microscope
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR00857D
Abstract: BN nanoparticles display high mechanical stiffness and elastic recovery enabling them to withstand large cyclic deformations and accumulate high strain.
Boron Nitride Nanotubes Filled with Ni and NiSi2 Nanowires in Situ
Publisher: American Chemical Society (ACS)
Date: 14-06-2003
DOI: 10.1021/JP034310Q
Size‐Tailored ZnO Submicrometer Spheres: Bottom‐Up Construction, Size‐Related Optical Extinction, and Selective Aniline Trapping
Publisher: Wiley
Date: 17-03-2011
Surface phonon coupling within boron nitride resolved by a novel near-field infrared pump-probe imaging technique
Publisher: SPIE
Date: 11-10-2016
DOI: 10.1117/12.2237901
Delaminated V2C MXene Nanostructures Prepared via LiF Salt Etching for Electrochemical Applications
Publisher: American Chemical Society (ACS)
Date: 13-07-2022
Electron Field Emission from Self-Organized Micro-Emitters of sp3-Bonded 5H Boron Nitride with Very High Current Density at Low Electric Field
Publisher: American Chemical Society (ACS)
Date: 04-2004
DOI: 10.1021/JP0493475
Diameter, strength and resistance tuning of double-walled carbon nanotubes in a transmission electron microscope
Publisher: Elsevier BV
Date: 04-2020
Synthesis of In2O3 Nanowire-Decorated Ga2O3 Nanobelt Heterostructures and Their Electrical and Field-Emission Properties
Publisher: American Chemical Society (ACS)
Date: 02-04-2010
DOI: 10.1021/NN100254F
Abstract: We report on the synthesis of In2O3 nanowire-decorated Ga2O3 nanobelt heterostructures via a simple catalyst-free method. A typical heterostructure, where an In2O3 nanowire forms a sort of a "dorsal fin" on the Ga2O3 nanobelt, exhibits the T-shaped cross-section. The structure, electrical porperties, and field-emission properties of this material are systematically investigated. The heterostructures possess a typical n-type semiconducting behavior with enhanced conductivity. Field-emission measurements show that they have a low turn-on field (approximately 1.31 V/microm) and a high field-enhancement factor (over 4000). The excellent field-emission characteristics are attributed to their special geometry and good electrical properties. The present In2O3-decorated Ga2O3 heterostructures are envisaged to be decent field-emitters useful in advanced electronic and optoelectronic nanodevices.
Ultrasharp h-BN Nanocones and the Origin of Their High Mechanical Stiffness and Large Dipole Moment.
Publisher: American Chemical Society (ACS)
Date: 17-08-2018
DOI: 10.1021/ACS.JPCLETT.8B02122
Abstract: We report on experimental synthesis and theoretical studies of ultrasharp BN-nanocones. Using scanning and transmission electron microscopy, the cone-like morphology of synthesized products was confirmed. Theoretical analysis of the dipole moment nature in h-BN nanocones reveals that the moment has contributions from the polarity of B-N bonds and electronic flexoelectric effect associated with a curved h-BN lattice. The latter phenomenon is predicted on the basis of the extension of the theory of flexoelectric effects in the h-BN lattice through establishing universality of the linear dependence of flexoelectric dipole moments on local curvature in various nano- h-BN networks (nanotubes and fullerenes). Our study of the atomic structure response and its polarization under deformation of nanocones with different apex angles shows the advantageous properties of cones with the smallest angles.
Electron-Beam-Induced Substitutional Carbon Doping of Boron Nitride Nanosheets, Nanoribbons, and Nanotubes
Publisher: American Chemical Society (ACS)
Date: 29-03-2011
DOI: 10.1021/NN103548R
Abstract: Substitutional carbon doping of the honeycomb-like boron nitride (BN) lattices in two-dimensional (nanosheets) and one-dimensional (nanoribbons and nanotubes) nanostructures was achieved via in situ electron beam irradiation in an energy-filtering 300 kV high-resolution transmission electron microscope using a C atoms feedstock intentionally introduced into the microscope. The C substitutions for B and N atoms in the honeycomb lattices were demonstrated through electron energy loss spectroscopy, spatially resolved energy-filtered elemental mapping, and in situ electrical measurements. The preferential doping was found to occur at the sites more vulnerable to electron beam irradiation. This transformed BN nanostructures from electrical insulators to conductors. It was shown that B and N atoms in a BN nanotube could be nearly completely replaced with C atoms via electron-beam-induced doping. The doping mechanism was proposed to rely on the knockout ejections of B and N atoms and subsequent healing of vacancies with supplying C atoms.
Fabrication of Silica-Shielded Ga-ZnS Metal-Semiconductor Nanowire Heterojunctions
Publisher: Wiley
Date: 18-08-2005
Thermal stability of carbon nanotubes probed by anchored tungsten nanoparticles
Publisher: Informa UK Limited
Date: 08-2011
Hydrogen Storage in Carbon and Oxygen Co‐Doped Porous Boron Nitrides
Publisher: Wiley
Date: 16-10-2020
Back-integration of recovered graphite from waste-batteries as ultra-high capacity and stable anode for potassium-ion battery
Publisher: Wiley
Date: 27-12-2022
Abstract: The rapid growth of lithium‐ion batteries (LIBs) in many markets from portable electronics to large scale electric vehicles makes it increasingly urgent to address recycling of strategic materials from used batteries. Herein, we report the excellent electrochemical performance of recycled graphite (REG) from spent LIBs, which was successfully employed as an anode in potassium‐ion batteries (KIBs). The graphite‐anode not only delivers highly reversible capacity of 361.4 mAh g −1 (at 0.1 C) but also demonstrates good long‐term cycling stability. The phase evolution of electrochemically potassium intercalated/deintercalated REG electrodes is elucidated using in‐situ X‐ray diffraction. The well‐preserved structure of the recycled graphite makes it ideal host for reversible intercalation and de‐intercalation of K‐ions. Furthermore, a potassium‐hybrid capacitor was fabricated by coupling the recycled graphite with textile waste‐derived activated carbon as cathode material. The cell demonstrates considerable energy density of 84.5 Wh kg −1 and power density of 400 W kg −1 , respectively. Apart from the great electrochemical performances, the low‐cost, abundant, and sustainable recycled graphite in this work will help to address the challenges in Li‐ion battery recycling and show the prospects of next‐generation battery system development.
Properties and engineering of individual inorganic nanotubes in a transmission electron microscope
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B814607A
Nanotubes in boron nitride laser heated at high pressure
Publisher: AIP Publishing
Date: 30-09-1996
DOI: 10.1063/1.116874
Abstract: Here we report on the finding of pure boron nitride (BN) nanotubes that do not contain any additional inclusions and on a new method for their growth: laser heating of boron nitrides at high nitrogen pressure (5–15 GPa). The multiwalled nanotubes were observed using high resolution electron microscopy and were chemically characterized by electron energy loss spectroscopy. The circular or polygonal cross-sectional nanotubes, which have 3–8 shells and a characteristic outer dimension cross section of 3–15 nm, were found to have grown either in melted cubic BN or in hexagonal+amorphous BN that had recrystallized on the specimen’s surface from the fluid phase.
Preparation and structure of magnesium oxide coated indium nanowires
Publisher: Elsevier BV
Date: 12-2003
Specific heat capacity and density of multi-walled boron nitride nanotubes by chemical vapor deposition
Publisher: Elsevier BV
Date: 2011
Below 200 °C Fabrication Strategy of Black‐Phase CsPbI3 Film for Ambient‐Air‐Stable Solar Cells
Publisher: Wiley
Date: 30-01-2020
Layered Rare-Earth Hydroxides (LRHs) of (Y1−xEux)2(OH)5NO3·nH2O (x = 0−1): Structural Variations by Eu
Publisher:
American Chemical Society (ACS)
Date:
02-07-2010
DOI:
10.1021/CM1011586
Publisher: American Chemical Society (ACS)
Date: 02-07-2010
DOI: 10.1021/CM1011586
Effects of ageing at 673 K on the compressive behaviour of 〈110〉 oriented (‘soft’) NiAl single crystals and polycrystals with and without Ti additions
Publisher: Elsevier BV
Date: 1996
Facile nanocoating method: From B-doped to BN-coated one-dimensional nanostructures
Publisher: AIP Publishing
Date: 29-06-2004
DOI: 10.1063/1.1768296
Abstract: B -doped MgO nanowires were synthesized through impurity-assisted physical evaporation of a mixture of B and MgO with a small amount of Ga2O3. The B content in the mixture affectsthe morphology of MgO nanowires. B-doped MgO nanotubes and cubes were formed when B-rich mixtures were utilized. Ammonothermal treatment of as-synthesized B-doped products resulted in the formation of uniform BN coatings adherent to nanowire and nanotube surfaces. Thus a facile BN coating method was developed. Finally the growth mechanism of the present BN-coated one-dimensional nanostructures was proposed.
Nucleotide-assisted decoration of boron nitride nanotubes with semiconductor quantum dots endows valuable visible-light emission in aqueous solution
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1SM06141K
A MoS2/Carbon hybrid anode for high-performance Li-ion batteries at low temperature
Publisher: Elsevier BV
Date: 04-2020
Nanoanalysis by a high-resolution energy filtering transmission electron microscope
Publisher: Wiley
Date: 2004
DOI: 10.1002/JEMT.20025
Abstract: An energy-filtering transmission electron microscope with 300 kV acceleration voltage was developed and the spatial resolution of elemental distribution images was improved. Observing oxygen monolayers in Al(11)O(3)N(9), it was shown that the actual resolution attained is up to 0.5 nm. Surface plasmon loss images of silver particles were taken with a resolution of better than 0.4 nm. Furthermore, the sensitivity is sufficiently high to distinguish indium content differences of 2.5 atomic percent in In(x)Al(1-x)As. This performance is good enough to analyze elemental distribution with atomic-level resolution. Furthermore, since analysis with the energy-filtering microscope is easy and practical, nanoanalysis may come into wide use not only in academic fields but also in industry.
Local Coulomb Explosion of Boron Nitride Nanotubes under Electron Beam Irradiation
Publisher: American Chemical Society (ACS)
Date: 12-03-2013
DOI: 10.1021/NN400423Y
Abstract: In many previous reports, the engineering of nanostructures using electron beam irradiation (EBI) in a high vacuum has primarily been based on the knock-on atom displacement. Herein, we report a new phenomenon under EBI that can also be effectively used to engineer a nanostructure: local Coulomb explosion (LCE) of cantilevered multiwalled boron nitride nanotubes (BNNTs) resulted from their profound positive charging. The nanotubes are gradually shortened, while the tubular shells at free ends are torn into graphene-like pieces and then removed during LCE. The phenomenon is dependent not only on the characteristics of an incident electron beam, as in the case of a common knock-on process, but also on the cantilevered tube length. Only after the electron beam density and tube length exceed the threshold values can LCE take place, and the threshold value for one of the parameters decreases with increasing the value of the other one. A model based on the diffusion of electron-irradiation-induced holes along a BNNT is proposed to describe the positive charge accumulation and can well explain the observed LCE. LCE opens up an efficient and versatile way to engineer BNNTs and other dielectric nanostructures with a shorter time and a lower beam density than those required for the knock-on effect-based engineering.
Facile Hydrothermal Synthesis, Field Emission and Electrochemical Properties of V<SUB>2</SUB>O<SUB>5</SUB> and <I>β</I>-AgVO<SUB>3</SUB> Nanobelts
Publisher: American Scientific Publishers
Date: 09-2010
Enhancing the nitrogen reduction activity of iron with inactive group-IVA elements at optimized stoichiometry
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3QI00798G
Abstract: Inert group-IVA elements can surprisingly enhance the e-N2RR capability of iron with an appropriate extent of alloying.
One-dimensional inorganic nanostructures: synthesis, field-emission and photodetection
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CS00126K
Abstract: One-dimensional inorganic nanostructures have drawn prime attention due to their potential for understanding fundamental physical concepts and constructing nanoscale electronic and optoelectronic devices. This critical review mainly focuses on our recent research progresses in 1D inorganic nanostructures, including their rational synthesis and potential applications, with an emphasis on field-emitter and photodetector applications. Firstly, we will discuss the rational design of synthetic strategies and the synthesis of 1D nanostructures via a vapour phase approach. Secondly, we will present our recent progresses with respect to several kinds of important inorganic nanostructures and their field-emission and photoconductivity characteristics. Finally, we conclude this review with some perspectives/outlook and future research in these fields (212 references).
The electrical delivery of a sublimable II–VI compound by vapor transport in carbon nanotubes
Publisher: Elsevier BV
Date: 10-2011
The synthesis, structure and cathodoluminescence of ellipsoid-shaped ZnGa2O4nanorods
Publisher: IOP Publishing
Date: 18-08-2009
DOI: 10.1088/0957-4484/20/36/365705
Abstract: We fabricated ellipsoid-shaped ZnGa(2)O(4) nanorods using a newly-designed chemical vapor deposition (CVD) process, different from the conventional methods. The optical properties of nanorods were studied using cathodoluminescence (CL) measurements. The nanorods displayed three distinct emissions centered at 360, 450 and 550 nm. The luminescence mechanism is thoroughly discussed and explained based on a detailed structural and compositional study with a transmission electron microscope (TEM) equipped with an electron energy loss spectrometer (EELS).
Uniform and high-quality submicrometer tubes of GaS layered crystals
Publisher: AIP Publishing
Date: 07-10-2005
DOI: 10.1063/1.2093924
Abstract: GaS, group III–VI semiconductor compound, is known to possess a layered structure. In this letter, uniform and high-quality GaS submicrometer tubes have been synthesized via a simple high-temperature thermal reaction route. Each GaS tube is uniform in size, and has length up to tens of microns and outer diameter of ∼200–900nm some of the tubes are partially filled with liquid metallic Ga “rods.” Photoluminescence spectrum reveals that the GaS tubes have two strong emission bands centered at ∼585 and ∼615nm. Possible reaction processes and a rolling-up growth mechanism of as-grown GaS tubes were briefly discussed.
Sonochemical Synthesis of Ga/ZnO Nanomaterials from a Liquid Metal for Photocatalytic Applications
Publisher: Wiley
Date: 16-11-2021
Abstract: The effective degradation of synthetic dyes via photocatalysis using abundant cheap materials is an ongoing challenge. Often photocatalysts are costly and employ complex fabrication processes that give limited efficiency which therefore inhibits widespread industrial proliferation. To address this issue, a simple room temperature alloying process followed by sonication for the preparation of photocatalytically active GaZnO nanosheets confined on a metallic GaZn core is reported. The material is characterized with X‐ray diffraction, X‐ray photoelectron spectroscopy, inductively coupled plasma optical emission spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and electrochemical techniques. These analyses confirm the presence of a metallic GaZn core decorated with GaZnO nanosheets. The resultant GaZn/GaZnO catalyst exhibits excellent photocatalytic activity for the degradation of methyl orange. A high degradation efficiency of 73% is achieved under solar simulated conditions which is attributed to the GaZn core acting as an electron sink allowing for effective charge carrier separation at the surface confined GaZnO sheets and the production of reactive oxygen species.
Evaluation of ion exchange resins for the removal of dissolved organic matter from biologically treated paper mill effluent
Publisher: Elsevier BV
Date: 2013
DOI: 10.1016/J.CHEMOSPHERE.2012.09.007
Abstract: In this study, the efficiency of six ion exchange resins to reduce the dissolved organic matter (DOM) from a biologically treated newsprint mill effluent was evaluated and the dominant removal mechanism of residual organics was established using advanced organic characterisations techniques. Among the resins screened, TAN1 possessed favourable Freundlich parameters, high resin capacity and solute affinity, closely followed by Marathon MSA and Marathon WBA. The removal efficiency of colour and lignin residuals was generally good for the anion exchange resins, greater than 50% and 75% respectively. In terms of the DOM fractions removal measured through liquid chromatography-organic carbon and nitrogen detector (LC-OCND), the resins mainly targeted the removal of humic and fulvic acids of molecular weight ranging between 500 and 1000 g mol(-1), the portion expected to contribute the most to the aromaticity of the effluent. For the anion exchange resins, physical adsorption operated along with ion exchange mechanism assisting to remove neutral and transphilic acid fractions of DOM. The column studies confirmed TAN1 being the best of those screened, exhibited the longest mass transfer zone and maximum treatable volume of effluent. The treatable effluent volume with 50% reduction in dissolved organic carbon (DOC) was 4.8 L for TAN1 followed by Marathon MSA - 3.6L, Marathon 11 - 2.0 L, 21K-XLT - 1.5 L and Marathon WBA - 1.2 L. The cation exchange resin G26 was not effective in DOM removal as the maximum DOC removal obtained was only 27%. The resin capacity could not be completely restored for any of the resins however, a maximum restoration up to 74% and 93% was achieved for TAN1 and Marathon WBA resins. While this feasibility study indicates the potential option of using ion exchange resins for the reclamation of paper mill effluent, the need for improving the regeneration protocols to restore the resin efficiency is also identified. Similarly, care should be taken while employing LC-OCND for characterising resin-treated effluents, as the resin degradation is expected to contribute some organic carbon moieties misleading the actual performance of resin.
Dynamics of rumen gene expression, microbiome colonization, and their interplay in goats
Publisher: Springer Science and Business Media LLC
Date: 21-04-2021
DOI: 10.1186/S12864-021-07595-1
Abstract: Preweaned rumen development is vital for animal health and efficient fermentation. In this study, we integrated ruminal transcriptomic and metagenomic data to explore the dynamics of rumen functions, microbial colonization, and their functional interactions during the first 8 weeks of life in goats. The dynamic rumen transcriptomic and microbial profiles both exhibited two distinct phases during early rumen development. The differentially expressed genes of the rumen transcriptome between the two phases showed that the immune-related response was enriched in the first phase and nutrient-related metabolism was enriched in the second phase, whereas the differentially expressed genes of the rumen microbiome were enriched in bacteriocin biosynthesis and glycolysis/gluconeogenesis activities. The developmental shift in the rumen transcriptome (at d 21) was earlier than the feed stimulus (at d 25) and the shift in the rumen microbiome (at d 42). Additionally, 15 temporal dynamic rumen gene modules and 20 microbial modules were revealed by coexpression network analysis. Functional correlations between the rumen and its microbiome were primarily involved in rumen pH homeostasis, nitrogen metabolism and the immune response. Rumen gene modules associated with the microbial alpha ersity index were also enriched in the immune response process. The present study touched the critical developmental process of rumen functions, microbial colonization and their functional interactions during preweaned development. Taken together, these results demonstrated that rumen development at the first phase is more likely a programmed process rather than stimulation from feed and the microbiome, while the shift of rumen metagenomes was likely regulated by both the diet and host. The intensive functional correlations between rumen genes and the microbiome demonstrated that synergistic processes occurred between them during early rumen development.
Elevated-temperature high-strength h-BN-doped Al2014 and Al7075 composites: Experimental and theoretical insights
Publisher: Elsevier BV
Date: 03-2021
(Ni,Cu)/hexagonal BN nanohybrids – New efficient catalysts for methanol steam reforming and carbon monoxide oxidation
Publisher: Elsevier BV
Date: 09-2020
Nonwetting and optical properties of BN nanosheet films
Publisher: Thomas Telford Ltd.
Date: 03-2013
DOI: 10.1680/SI.12.00007
Abstract: This study begins with a brief discussion on the high-temperature chemical vapor deposition synthesis of transparent boron nitride nanosheet films on silicon/silicon dioxide substrates. The compact nanosheets grew perpendicular to the substrate surface, and the majority of them had thicknesses of less than 5 nm. Ultraviolet-visible spectroscopy measurements demonstrated a wide optical band gap of ∼5·6 eV of nanosheets, and cathodoluminescence spectroscopy showed their strong luminescence emission in the ultraviolet region. The nanorough surface morphology of the films induced nonwetting and self-cleaning features with water-contact angles reaching ∼153°. Such transparent superhydrophobic films can be utilized for the preparation of nonwetting ultraviolet light-emitting surfaces for optoelectronics applications, antifouling surfaces on marine vessels or oil–water separation equipments.
Interface Dynamic Behavior Between a Carbon Nanotube and Metal Electrode
Publisher: Wiley
Date: 05-01-2010
Immobilization of Proteins on Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 11-11-0100
DOI: 10.1021/JA055989+
Abstract: We report for the first time that proteins are immobilized on boron nitride nanotubes. It is found that there is a natural affinity of a protein to BNNT this means that it can be immobilized on BNNT directly, without usage of an additional coupling reagent. For the most effective immobilization, noncovalently functionalized BNNTs should be used. The effect of immobilization was studied using high-resolution transmission electron microscopy and energy dispersion spectroscopy.
Direct Synthesis of B−C−N Single-Walled Nanotubes by Bias-Assisted Hot Filament Chemical Vapor Deposition
Publisher: American Chemical Society (ACS)
Date: 29-04-2006
DOI: 10.1021/JA0606733
Abstract: Direct synthesis of large-scale ternary boron carbonitride single-walled nanotubes (BCN-SWNTs) via a bias-assisted HFCVD process was presented. The BCN-SWNTs were grown over the powdery Fe-Mo/MgO catalyst by using CH4, B2H6, and ethylenediamine vapor as the reactant gases. As high as 16 atom % nitrogen can be incorporated within the nanotube shells, with the boron content in the range of 2-4 atom %. The ternary covalent bonding nature of the BCN-SWNTs was well characterized, and the B, C, and N elemental maps were clearly imaged by energy-filtered transmission electron microscopy.
A Comprehensive Review of One-Dimensional Metal-Oxide Nanostructure Photodetectors
Publisher: MDPI AG
Date: 20-08-2009
DOI: 10.3390/S90806504
In-situ TEM electrical and mechanical properties measurements of one-dimensional inorganic nanomaterials
Publisher: IEEE
Date: 2008
Inorganically filled carbon nanotubes: Synthesis and properties
Publisher: Walter de Gruyter GmbH
Date: 06-08-2010
Abstract: Since the discovery of carbon nanotubes (CNTs) in 1991, widespread research has been carried out to understand their useful physical and electronic properties and also to explore their use in devices. CNTs have many unique properties such as tunable electrical resistance, mechanical robustness, and high thermal conductivity, which when combined with other inorganic materials such as phosphors or superconductors could lead to hetero-structures with erse functionality. We have been able to obtain mass production of such materials wherein CNTs form core-shell heterostructures with metals, semiconductors, insulators, and even metal-semiconductor heterojunctions. The emerging strategy employs a high-temperature chemical vapor deposition (CVD) technique and high heating rates. Interestingly, due to their high temperature stability, CNTs can act as a nanoreactor for production of exotic materials inside it. In this article, we take ZnS-filled CNTs as an ex le to explain our synthesis strategy. We explore the optical behavior of these complex materials, analyzing both their luminescence and degradation upon exposure to an electron beam. In addition, the mechanical response of filled CNTs has been evaluated in idually inside a transmission electron microscope fitted with an atomic force microscopy–transmission electron microscopy (AFM–TEM) s le holder. Many applications can be envisioned for these nanostructures ranging from nanothermometers to photo-protective storage and delivery devices.
Zinc-Tiered Synthesis of 3D Graphene for Monolithic Electrodes
Publisher: Wiley
Date: 07-05-2019
Abstract: A high-surface-area conductive cellular carbon monolith is highly desired as the optimal electrode for achieving high energy, power, and lifetime in electrochemical energy storage. 3D graphene can be regarded as a first-ranking member of cellular carbons with the pore-wall thickness down to mono/few-atomic layers. Current 3D graphenes, derived from either gelation or pyrolysis routes, still suffer from low surface area, conductivity, stability, and/or yield, being subjected to methodological inadequacies including patchy assembly, wet processing, and weak controllability. Herein, a strategy of zinc-assisted solid-state pyrolysis to produce a superior 3D graphene is established. Zinc unprecedentedly impregnates and delaminates a solid ("nonhollow") char into multiple membranes, which eliminates the morphological impurities ever-present in the previous pyrolyses using solid-state carbon precursors. Zinc also catalyzes the carbonization and graphitization, and its in situ thermal extraction and recycling enables the scaled-up production. The created 3D graphene network consists integrally of morphologically and chemically pure graphene membranes. It possesses unrivaled surface area, outstanding stability, and conductivity both in air and electrolyte, exceeding preexisting 3D graphenes. The advanced 3D graphene thus equips a porous monolithic electrode with unparalleled energy density, power density, and lifetime in electric-double-layer capacitive devices.
Effect of ferric and ferrous iron addition on phosphorus removal and fouling in submerged membrane bioreactors
Publisher: Elsevier BV
Date: 02-2015
DOI: 10.1016/J.WATRES.2014.11.011
Abstract: The effect of continuously dosing membrane bioreactors (MBRs) with ferric chloride (Fe(III)) and ferrous sulphate (Fe(II)) on phosphorus (P) removal and membrane fouling is investigated here. Influent phosphorus concentrations of 10 mg/L were consistently reduced to effluent concentrations of less than 0.02 mg/L and 0.03-0.04 mg/L when an Fe(III)/P molar ratio of 4.0 and Fe/P molar ratio (for both Fe(II) and Fe(III)) of 2.0 were used, respectively. In comparison, effluent concentrations did not decrease below 1.35 mg/L in a control reactor to which iron was not added. The concentrations of supernatant organic compounds, particularly polysaccharides, were reduced significantly by iron addition. The sub-critical fouling time (tcrit) after which fouling becomes much more severe was substantially shorter with Fe(III) dosing (672 h) than with Fe(II) dosing (1200-1260 h) at Fe/P molar ratios of 2.0 while the control reactor (no iron dosing) exhibited a tcrit of 960 h. Not surprisingly, membrane fouling was substantially more severe at Fe/P ratios of 4. Fe(II) doses yielding Fe/P molar ratios of 2 or less with dosing to the aerobic chamber were found to be optimal in terms of P removal and fouling mitigation performance. In long term operation, however, the use of iron for maintaining appropriately low effluent P concentrations results in more severe irreversible fouling necessitating the application of an effective membrane cleaning regime.
Near-band-edge recombinations in multiwalled boron nitride nanotubes: Cathodoluminescence and photoluminescence spectroscopy measurements
Publisher: American Physical Society (APS)
Date: 16-06-2008
Optomechanical Properties of MoSe
Publisher: American Chemical Society (ACS)
Date: 10-01-2022
DOI: 10.1021/ACS.NANOLETT.1C03796
Abstract: Free-standing few-layered MoSe
Boron nitride nanotube growth via boron oxide assisted chemical vapor transport-deposition process using LiNO3 as a promoter
Publisher: Springer Science and Business Media LLC
Date: 08-04-2015
Compressive flow stress of a binary stoichiometric Ni3Al single crystal
Publisher: Elsevier BV
Date: 12-1997
Preparation and Hydrogen Sorption Performances of BCNO Porous Microbelts with Ultra‐Narrow and Tunable Pore Widths
Publisher: Wiley
Date: 20-09-2013
Peptide Self-Assembly Controlled Photoligation of Polymers
Publisher: American Chemical Society (ACS)
Date: 11-07-2023
DOI: 10.1021/JACS.3C03961
Insights into the structure of BN nanotubes
Publisher: AIP Publishing
Date: 25-09-2000
DOI: 10.1063/1.1313251
Abstract: The following features of multiwalled BN nanotubes were discovered using a field emission high-resolution analytical transmission electron microscope: (i) coexistence of hexagonal and rhombohedral stacking in nanotube shell assembly (ii) flattening of nanotube cross section, which makes possible clear atomic resolution of the core structure in a three-shelled nanotube and (iii) change in chirality of tubular layers from armchair to zigzag arrangement in a 30° double-walled nanotube kink, as revealed by atomically resolved images of tube wall segments.
Ni(OH)2 nanosheet @ Fe2 O3 nanowire hybrid composite arrays for high-performance supercapacitor electrodes
Publisher: Elsevier BV
Date: 09-2013
Size Effects on the Mechanical Properties of Nanoporous Graphene Networks
Publisher: Wiley
Date: 13-03-2019
Evaluating the impact of recycled fiber content on effluent recycling in newsprint manufacture
Publisher: Elsevier BV
Date: 09-2013
DOI: 10.1016/J.CHEMOSPHERE.2013.04.015
Abstract: This paper investigates the effect of using recycled fiber (RCF) in newsprint production on the effluent quality and its treatability using membrane operations for internal and external recycling and reuse. Increased chemical usage in RCF for deinking had significant impact on the silica and sodium content of the effluent which in turn limits the membrane's operation. Increasing the RCF content from 0% to 50% is estimated to increase the silica content from 4 to 119mgL(-1) and sodium content from 135 to 500mgL(-1). A process model was developed to calculate the impact of these excess chemicals on the greenhouse gas (GHG) emission and brine disposal for an integrated membrane plant design producing 4MLday(-1) of recycled water. As the ratio of RCF increased from 0% to 50% in the mill process, the operating pressure increased for nanofiltration (NF) and reverse osmosis (RO). Additionally, organics presence in the feed increased the NF operating pressure above the simulated value and reduced the silica removal efficiency by 15%. Incorporation of lime coagulation pretreatment was found to be essential to operate RO at high recoveries with relatively GHG emissions. Without pretreatment, as RCF content increased from 0% to 50%, RO recovery decreased from 80% to 22% and the expended GHG increased from 0.9 to 3.5kgCO2m(-3). Although the excess sodium concentration limits the brine disposal for irrigation purposes, a partial blending of the treated wastewater with other process streams resulted in the reduction of sodium absorption ratio by 20%.
Free radical exit in emulsion polymerization. II. Model discrimination via experiment
Publisher: Wiley
Date: 03-1994
Upcycling of nickel oxide from spent Ni-MH batteries as ultra-high capacity and stable Li-based energy storage devices
Publisher: Elsevier BV
Date: 07-2023
One‐Step Template‐Free Synthesis of Highly Porous Boron Nitride Microsponges for Hydrogen Storage
Publisher: Wiley
Date: 27-12-2013
Quasi‐Aligned Single‐Crystalline W18O49 Nanotubes and Nanowires
Publisher: Wiley
Date: 05-08-2003
Stress-relieving defects enable ultra-stable silicon anode for Li-ion storage
Publisher: Elsevier BV
Date: 04-2020
Self-assembly of nickel phosphate-based nanotubes into two-dimensional crumpled sheet-like architectures for high-performance asymmetric supercapacitors
Publisher: Elsevier BV
Date: 2020
Mn−Si-Catalyzed Synthesis and Tip-End-Induced Room Temperature Ferromagnetism of SiC/SiO2 Core−Shell Heterostructures
Publisher: American Chemical Society (ACS)
Date: 06-11-2008
DOI: 10.1021/JP807012K
Novel semiconducting nanowire heterostructures: synthesis, properties and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B808320G
Engineering of electronic structure of boron-nitride nanotubes by covalent functionalization
Publisher: American Physical Society (APS)
Date: 19-10-2006
Fullerene and onion formation under electron irradiation of boron-doped graphite
Publisher: Elsevier BV
Date: 02-1999
ZnS nanostructures: From synthesis to applications
Publisher: Elsevier BV
Date: 02-2011
Single-crystalline ZnS nanobelts with sharp ultraviolet (UV) emission at room temperature as UV-light sensors
Publisher: IEEE
Date: 2010
Structural characterization and field emission of stacked-cone GaN nanorods
Publisher: IEEE
Date: 2010
Fabrication of ZnS∕SiC nanocables, SiC-shelled ZnS nanoribbons (and sheets), and SiC nanotubes (and tubes)
Publisher: AIP Publishing
Date: 04-10-2004
DOI: 10.1063/1.1801168
Abstract: Here we report on the synthesis of ZnS∕SiC nanocables and SiC nanotubes and other relevant structures via a controllable two-stage thermal process using ZnS nanowires, nanoribbons, and sheets as templates. Within the cables, the ZnS cores are polytypes of fcc- and hcp-ZnS with ∼50–130nm diameter, and the SiC shells are polycrystalline β-SiC with ∼15–50nm thickness. SiC nanotubes were formed through simple removal of ZnS cores from the cables. Room-temperature photoluminescence of the SiC nanotubes displays a strong green emission band centered at ∼517nm. The nanostructures described herewith may be valuable in the blocks of advanced semiconducting devices.
ChemInform Abstract: Recent Advances in Solution‐Processed Inorganic Nanofilm Photodetectors
Publisher: Wiley
Date: 23-04-2014
Recent Progress on Fabrications and Applications of Boron Nitride Nanomaterials: A Review
Publisher: Elsevier BV
Date: 06-2015
Single-crystalline cubic structured InP nanosprings
Publisher: AIP Publishing
Date: 12-06-2001
DOI: 10.1063/1.2208933
Abstract: Cubic structured nanosprings, InP nanosprings, have been synthesized via a simple thermochemical process using InP and ZnS as the source materials. Each InP nanospring is formed by rolling up a single InP nanobelt with the growth direction along the ⟨111⟩ orientation. The formation of these novel nanostructures is mainly attributed to the minimization of the electrostatic energy due to the polar charges on the ±(002) side surfaces of cubic InP. Cathodoluminescence properties were also studied, which reveal that the InP nanosprings have three emission bands centered at ∼736, ∼920, and ∼980nm.
Room temperature carbon monoxide oxidation based on two-dimensional gold-loaded mesoporous iron oxide nanoflakes
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC03639J
Abstract: A room-temperature catalyst for carbon monoxide oxidation based on gold-loaded mesoporous maghemite nanoflakes has been developed.
Deformation-Driven Electrical Transport of Individual Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 09-02-2007
DOI: 10.1021/NL062540L
Abstract: In contrast to standard metallic or semiconducting graphitic carbon nanotubes, for years their structural analogs, boron nitride nanotubes, in which alternating boron and nitrogen atoms substitute for carbon atoms in a graphitic network, have been considered to be truly electrically insulating due to a wide band gap of layered BN. Alternatively, here, we show that under in situ elastic bending deformation at room temperature inside a 300 kV high-resolution transmission electron microscope, a normally electrically insulating multiwalled BN nanotube may surprisingly transform to a semiconductor. The semiconducting parameters of bent multiwalled BN nanotubes squeezed between two approaching gold contacts inside the pole piece of the microscope have been retrieved based on the experimentally recorded I-V curves. In addition, the first experimental signs suggestive of piezoelectric behavior in deformed BN nanotubes have been observed.
BN nanospheres as CpG ODN carriers for activation of toll-like receptor 9
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM10199D
The mechanical response of turbostratic carbon nanotubes filled with Ga-doped ZnS: I. Data processing for the extraction of the elastic modulus
Publisher: IOP Publishing
Date: 14-09-2009
DOI: 10.1088/0957-4484/20/40/405706
Abstract: The mechanical response of hybrid carbon nanotubes to applied uniaxial compressive forces has been evaluated inside a transmission electron microscope. The initially crooked nanocolumnar materials had an average elastic modulus of 0.53 GPa, measured in situ via a device based on an atomic force microscope cantilever. To extract this property it was necessary to curtail several sources of error (contact sliding, electronic interferences, etc) and develop the methodology herewith outlined. Since the present study was carried out with a commercially available s le holder, these mechanical studies are pertinent to all those working with one-dimensional structures such as nanorods and nanowires.
Syntheses and properties of B–C–N and BN nanostructures
Publisher: The Royal Society
Date: 31-08-2004
Heterostructures of vertical, aligned and dense SnO2 nanorods on graphene sheets: in situ TEM measured mechanical, electrical and field emission properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM32904B
Role of structural defects in the ultraviolet luminescence of multiwall boron nitride nanotubes
Publisher: AIP Publishing
Date: 18-12-2015
DOI: 10.1063/1.4937990
Abstract: BN nanotubes (BNNTs) are structurally similar to their carbon counterparts, though much less investigated. New synthesis methods have been recently reported, enabling the production of industrial quantities and stimulating the search of new applications for the BNNTs. In this paper, we investigate the luminescence of multiwall BNNTs. By performing cathodoluminescence experiments on single tubes at 10 K, we show that the tube luminescence is highly heterogeneous (i) from tube to tube and (ii) spatially along a single tube. By combining cathodoluminescence measurements with a nanometer excitation and transmission electron microscopy on the same tube, we correlate luminescence and structural features. We conclude that the near-band-edge luminescence of BNNTs (≈5.4 eV) is related to the presence of extended structural defects, such as dislocations or ruptures in the wall stacking.
Mechanical Properties of Bamboo-like Boron Nitride Nanotubes by In Situ TEM and MD Simulations: Strengthening Effect of Interlocked Joint Interfaces
Publisher: American Chemical Society (ACS)
Date: 10-08-2011
DOI: 10.1021/NN202283A
Abstract: Understanding the influence of interfacial structures on the nanoarchitecture mechanical properties is of particular importance for its mechanical applications. Due to a small size of constituting nanostructural units and a consequently high volume ratio of such interfacial regions, this question becomes crucial for the overall mechanical performance. Boron nitride bamboo-like nanotubes, called hereafter boron nitride nanobamboos (BNNBs), are composed of short BN nanotubular segments with specific interfaces at the bamboo-shaped joints. In this work, the mechanical properties of such structures are investigated by using direct in situ transmission electron microscopy tensile tests and molecular dynamics simulations. The mechanical properties and deformation behaviors are correlated with the interfacial structure under atomic resolution, and a geometry strengthening effect is clearly demonstrated. Due to the interlocked joint interfacial structures and compressive interfacial stresses, the deformation mechanism is switched from an interplanar sliding mode to an in-plane tensile elongation mode. As a result of such a specific geometry strengthening effect, the BNNBs show high tensile fracture strength and Young's modulus up to 8.0 and 225 GPa, respectively.
Thermodynamic efficiencies and GHG emissions of alternative desalination processes
Publisher: IWA Publishing
Date: 07-2010
DOI: 10.2166/WS.2010.085
Abstract: Three alternative approaches to desalinating seawater were evaluated with respect to their thermodynamic efficiencies and greenhouse-gas emissions. The technologies considered were multistage flash distillation (MSF), reverse osmosis (RO), and membrane distillation (MD). The analysis was based on published stream data from large-scale operational MSF and RO facilities and experimental-scale data for the MD process. RO was found to be the most exergy-efficient (30.1%) followed by MD (14.27%) and MSF (7.73%). RO and MD required less power consumption to produce water (3.29 kWh/m3 and 5.9 kWh/m3, respectively) compared to MSF which had a much higher energy demand (16.7 kWh/m3). Similar results were obtained when comparing equivalent carbon dioxide emissions from each process MD and RO accounted for 5.22 and 2.91 kg CO2eq/m3, respectively, whereas MSF generated three to four times that amount. The results indicate that MD has potential as a commercially viable technique for seawater desalination provided a source of waste heat is available. This study provides an overview of the use of thermodynamic efficiency analysis to evaluate desalination processes and provides insight into where energy may be saved with developed desalination processes and areas of research for emerging desalination techniques.
Crystallography-derived optoelectronic and photovoltaic properties of CsPbBr3 perovskite single crystals as revealed by in situ transmission electron microscopy
Publisher: Elsevier BV
Date: 09-2020
Silicon multi-branch nanostructures for decent field emission and excellent electrical transport
Publisher: IOP Publishing
Date: 03-03-2011
DOI: 10.1088/0957-4484/22/14/145705
Abstract: We report on the synthesis, field electron emission and electric transport properties of a novel nanomaterial: ordered arrays of crystallized silicon multi-branch nanostructures. A decent field electron emission with relatively low turn-on field of 3.16 V µm⁻¹ and high field-enhancement factor of 1252 was received for the silicon nanobranches. The relevancies between field-emission current-voltage characteristic, turn-on field, threshold field and s le-anode distance have been thoroughly analyzed. In addition, electrical transport measurements revealed a small electrical resistance of 0.51 MΩ for as-prepared silicon nanobranches. In contrast, by improving the silicon nanobranch-electrode contact, vacuum annealing dramatically reduced the electrical resistance, by a factor approaching two, while thermal oxidation resulted in a much higher resistance due to the amorphous oxide coating of the silicon nanobranches, both of the current versus voltage curves became more linear and symmetrical, and the transport stability was obviously improved.
Optical properties of multiwall boron nitride nanotubes
Publisher: Wiley
Date: 11-2007
Multi-walled BN nanotubes synthesized by carbon-free method
Publisher: Elsevier BV
Date: 08-2004
Morphology-Controlled Synthesis of ZnO Nanostructures by a Simple Round-to-Round Metal Vapor Deposition Route
Publisher: American Chemical Society (ACS)
Date: 11-02-2006
DOI: 10.1021/JP056783Y
Abstract: One-dimensional ZnO nanostructures with different morphologies have been successfully synthesized through a simple round-to-round metal vapor deposition route at 550 degrees C with a zinc powder covered indium film as the source material. The structures and morphologies of the products were characterized in detail by using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Studies found that the morphology of the products can be easily tuned from one experimental round to another. Possible growth mechanisms for the formation of one-dimensional ZnO nanostructures with different morphologies are discussed. Photoluminescence studies show that there are sharp UV emission and broad defect-related green emissions for the products obtained in all experimental rounds. Relative intensity of the UV emission to defect-related emissions gradually increased from one experimental round to another.
Optimising mixing and nutrient removal in membrane bioreactors: CFD modelling and experimental validation
Publisher: Elsevier BV
Date: 2010
Centimeter-long Ta3N5nanobelts: synthesis, electrical transport, and photoconductive properties
Publisher: IOP Publishing
Date: 03-04-2013
DOI: 10.1088/0957-4484/24/17/175701
Abstract: Centimeter-long Ta3N5 nanobelts were synthesized by a reaction of centimeter-long TaS3 nanobelt templates with flowing NH3 at 800 °C for 2 h. The nanobelts have cross-sections of about 50 × 100 nm(2), and lengths up to 0.5 cm. A field effect transistor (FET) made of a single Ta3N5 nanobelt was fabricated on silica/silicon substrate. The electric transport of the in idual nanobelt revealed that the nanobelt is a semiconductor with a room-temperature resistivity of 11.88 Ω m, and can be fitted well with an empirical formula ρ = 10831 exp(-T/43.8) - 22.6, where ρ is resistivity (Ω m) and T is absolute temperature (K). The FET showed decent photoconductive performance under light irradiation in the range 250-630 nm. The photocurrent increased by nearly 10 times the dark current under 450 nm light irradiation at an applied voltage of 5.0 V.
N-Doped Graphene–VO2(B) Nanosheet-Built 3D Flower Hybrid for Lithium Ion Battery
Publisher: American Chemical Society (ACS)
Date: 27-03-2013
DOI: 10.1021/AM400202V
Abstract: Recently, we have shown that the graphene-VO2(B) nanotube hybrid is a promising lithium ion battery cathode material (Nethravathi et al. Carbon, 2012, 50, 4839-4846). Though the observed capacity of this material was quite satisfactory, the rate capability was not. To improve the rate capability we wanted to prepare a graphene-VO2(B) hybrid in which the VO2(B) would be built on 2D nanosheets that would enable better electrode-electrolyte contact. Such a material, a N-doped graphene-VO2(B) nanosheet-built 3D flower hybrid, is fabricated by a single-step hydrothermal reaction within a mixture of ammonium vanadate and colloidal dispersion of graphite oxide. The 3D VO2(B) flowers which are uniformly distributed on N-doped graphene are composed of ultrathin 2D nanosheets. When used in lithium ion batteries, this material exhibits a large capacity, high rate capability, and excellent cycling stability. The enhanced performance results from its unique features: excellent electronic conductivity associated with the N-doped graphene, short transportation length for lithium ions related to ultrathin nanosheets, and improved charge transfer due to the anchoring of the VO2(B) flowers to N-doped graphene.
Mechanical, Electrical, and Crystallographic Property Dynamics of Bent and Strained Ge/Si Core-Shell Nanowires As Revealed by in situ Transmission Electron Microscopy.
Publisher: American Chemical Society (ACS)
Date: 22-10-2018
DOI: 10.1021/ACS.NANOLETT.8B03398
Abstract: Research on electromechanical properties of semiconducting nanowires, including plastic behavior of Si nanowires and superb carrier mobility of Ge and Ge/Si core-shell nanowires, has attracted increasing attention. However, to date, there have been no direct experimental studies on crystallography dynamics and its relation to electrical and mechanical properties of Ge/Si core-shell nanowires. In this Letter, we in parallel investigated the crystallography changes and electrical and mechanical behaviors of Ge/Si core-shell nanowires under their deformation in a transmission electron microscope (TEM). The core-shell Ge/Si nanowires were bent and strained in tension to high limits. The nanowire Young's moduli were measured to be up to ∼191 GPa, and tensile strength was in a range of 3-8 GPa. Using high-resolution imaging, we confirmed that under large bending strains, Si shells had irregularly changed to the polycrystalline/amorphous state, whereas Ge cores kept single crystal status with the local lattice strains on the compressed side. The nanowires revealed cyclically changed electronic properties and had decent mechanical robustness. Electron diffraction patterns obtained from in situ TEM, paired with theoretical simulations, implied that nonequilibrium phases of polycrystalline/amorphous Si and β-Sn Ge appearing during the deformations may explain the regarded mechanical robustness and varying conductivities under straining. Finally, atomistic simulations of Ge/Si nanowires showed the pronounced changes in their electronic structure during bending and the appearance of a conductive channel in compressed regions which might also be responsible for the increased conductivity seen in bent nanowires.
Bulk Synthesis of Single-Crystalline Magnesium Oxide Nanotubes
Publisher: American Chemical Society (ACS)
Date: 20-03-2004
DOI: 10.1021/IC0351489
Abstract: Crystalline tubular magnesium oxide nanostructures were obtained through carbon-thermal evaporation of a MgO powder. Gallium oxide was added into the mixture of MgO and carbon. The reduction of gallium oxide by carbon resulted in gallium vapor at high temperatures. Condensed gallium droplets catalyzed the anisotropic growth of tubular MgO nanostructures in situ. The products were characterized by X-ray powder diffraction technique, scanning electron microscopy, and high-resolution microscopy. All the analyses indicated that the prepared tubular MgO nanostructures are, in fact, single crystals.
Self-stacked Co3O4 nanosheets for high-performance lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC15169J
Abstract: Self-stacked Co(3)O(4) nanosheets separated by carbon layers were synthesized via a facile method. They exhibit excellent electrochemical performance that results from superior electronic conductivity endowed by carbon, a reduced Li(+) diffusion length within the building blocks and a large electrode/electrolyte contact area due to the interspaces between the blocks.
Modes of genetic adaptations underlying functional innovations in the rumen
Publisher: Springer Science and Business Media LLC
Date: 05-11-2020
Vanadium‐Containing Layered Materials as High‐Performance Cathodes for Aqueous Zinc‐Ion Batteries
Publisher: Wiley
Date: 14-07-2021
Abstract: The world is currently in the midst of a climate crises and many across the globe are competing to find new technologies to create clean, and effective ways of harnessing renewable energy sources. However, this energy needs to be stored and the current systems simply would not last. Zinc‐ion batteries (ZIBs) with vanadium‐containing cathodes are a recently arising technology providing a cheap, safe, and eco‐friendly alternative to the current systems. Vanadium is a material that has long been used for electrochemical systems due to its large range of stable oxidation states. Most common is the vanadium oxide (V 2 O 5 ) renowned for its open layered framework and manipulatable structure. However, this is not the only vanadium‐containing material that is proposed for use in ZIBs. The vanadium family is comprised of four main sub‐categories under which materials can be classified: vanadium oxides, vanadium phosphates, vanadates, and O 2 ‐free vanadium compounds. This report delves into the specifics of each of these sub‐families to further develop the understanding of their functionality by highlighting their structural and morphological characteristics, aptitude for modification, and the corresponding electrochemical properties. Through this investigation, the application of these materials in ZIB systems is highlighted and future development aims considered.
Growth of Single-Crystal Indium Nitride Nanotubes and Nanowires by a Controlled-Carbonitridation Reaction Route
Publisher: Wiley
Date: 18-10-2004
Cables of BN-insulated B–C–N nanotubes
Publisher: AIP Publishing
Date: 20-02-2003
DOI: 10.1063/1.1555713
Abstract: Nanotubular ropes composed of aligned multiwalled nanotubes having electrically insulating BN-rich outer shells and semiconducting B–C–N inner shells were synthesized through the reaction of aligned CNx (x⩽0.1) nanotube mats with boron oxide and nitrogen at ∼2000–2110 K. The atomic structure and chemical composition of the ropes were analyzed by high-resolution transmission and energy-filtered (Omega filter) electron microscopy. In idual ropes display perfect insulating performance of BN-rich outer layers and excellent field emission and thus conductive properties of inner B–C–N layers. A semiconducting nanometer-scale cable with built-in electrical insulation has thus been realized.
Twinning in ultrathin silicon nanowires
Publisher: Walter de Gruyter GmbH
Date: 05-2006
DOI: 10.3139/146.101266
Abstract: Galium nanodroplets induced the anisotropic growth of ultrathin (diameter ( nm) silicon nanowires in accordance with the vapor-liquid-solid (VLS) mechanism. X-ray diffraction and dispersion spectroscopy, and scanning, and transmission electron microscopy (TEM) were used to characterize the product. High-resolution TEM analysis revealed the existence of twins in the nanowires. In contrast to the theoretically predicated 5-fold twinning in ultrathin Si nanowires (diameter ( nm), no twinning on the {111} planes along the wire axial directions was observed. The possible reasons for the formation of novel nanostructures are discussed.
Structural Transformation, Photocatalytic, and Field-Emission Properties of Ridged TiO2 Nanotubes
Publisher: American Chemical Society (ACS)
Date: 06-04-2011
DOI: 10.1021/AM200152B
Abstract: Self-organized, freestanding TiO(2) nanotube arrays with ridged structures have been fabricated using a one-step anodic oxidation method. Their structural, photocatalytic, and field-emission (FE) properties have systematically been investigated. The as-synthesized nanostructures have been characterized using XRD, Raman spectroscopy, SEM, and HRTEM. The experimental results show that after an annealing process, the starting amorphous nanotubes have been turned into anatase phase structures, and the tube walls have been decorated with nanoparticles, different from the original ridged nanotubes. Furthermore, the anatase phase nanotubes have demonstrated better photocatalytic properties than their amorphous counterparts, which is caused by the larger surface area and improved crystallinity. With respect to FE properties, the as-grown nanotubes have the lower turn-on field E(to) and the higher field enhancement factor β compared to the annealed nanotubes. The relationship between E(to), β, and the tube arrangements and morphologies has also been discussed.
Bandgap‐Graded CdSxSe1–x Nanowires for High‐Performance Field‐Effect Transistors and Solar Cells
Publisher: Wiley
Date: 10-12-2012
Boron Nitride Nanotubes: Recent Breakthroughs and Challenges
Publisher: The Electrochemical Society
Date: 28-09-2007
DOI: 10.1149/1.2783298
Abstract: Herein we describe recent achievements in the synthesis and multi-purpose analysis of multiwalled boron nitride nanotubes prepared at high-yield at the National Institute for Materials Science (NIMS), Tsukuba. The latest results with respect to novel BN nanotube-containing polymeric composites and electromechanical property measurements on in idual BN nanotubes are presented
3 Controlled Nanocolumnar Arrays
Publisher: Jenny Stanford Publishing
Date: 05-07-2012
DOI: 10.1201/B12707-10
Origin of Coproduced Boron Nitride and Carbon Helical Conical Fibers
Publisher: American Chemical Society (ACS)
Date: 24-05-2011
DOI: 10.1021/CG200397Z
Molecule Ordering Triggered by Boron Nitride Nanotubes and “Green” Chemical Functionalization of Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 29-11-2007
DOI: 10.1021/JP076980S
Boron Nitride Nanosheets: novel Syntheses and Applications in polymeric Composites
Publisher: IOP Publishing
Date: 29-11-2013
Nanocable-Aligned ZnS Tetrapod Nanocrystals
Publisher: American Chemical Society (ACS)
Date: 12-2003
DOI: 10.1021/JA037965D
Abstract: An effective method for synthesizing ZnS-core/carbon-sheath nanocables and nanocable-aligned ZnS tetrapod nanocrystals has been developed. Nanocable heterostructures and nanocable-linked ZnS tetrapods were synthesized in a controllable way. The tetrapods are single crystalline cubic ZnS with triangular-prism branches stretching out in four {111} directions. The tetrapods were aligned together with ZnS-C nanocables along the [100] direction.
n-ZnO/p-Si 3D heterojunction solar cells in Si holey arrays
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2NR11752E
Abstract: A wafer-scale, low-cost solar cell based on n-ZnO -Si 3D heterojunction arrays on holey Si substrates has been fabricated. This device shows a power-conversion efficiency of 1.2% and high photosensitivity. The present n-ZnO -Si heterojunction architectures are envisaged as potentially valuable candidates for next-generation photovoltaics.
Synthesis of Mesoporous BN and BCN Exhibiting Large Surface Areas via Templating Methods
Publisher: American Chemical Society (ACS)
Date: 11-2005
DOI: 10.1021/CM051780J
Centimeter‐Long V2O5 Nanowires: From Synthesis to Field‐Emission, Electrochemical, Electrical Transport, and Photoconductive Properties
Publisher: Wiley
Date: 18-06-2010
Two-probe electrical measurements in transmission electron microscopes-Behavioral control of tungsten microwires
Publisher: Wiley
Date: 02-2009
DOI: 10.1002/JEMT.20648
Abstract: Tungsten microwires have been manipulated and electrically probed inside a transmission electron microscope. Using Au electrodes, the current-voltage characteristics of the W structures were extracted. These showed highly variable behaviors dependent on various factors, the most important of these being orientation and stiffness of the contact. Careful control of loading force and Au-W contact angle enabled a considerable degree of behavior tailoring from nonlinear to Ohmic responses.
Gallium Nitride Nanotubes by the Conversion of Gallium Oxide Nanotubes
Publisher: Wiley
Date: 30-07-2003
Nanostructured solar cells harvesting multi-type energies
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2EE03226K
Expansion-limited aggregation of nanoclusters in a single-pulse laser-produced plume
Publisher: American Physical Society (APS)
Date: 19-11-2009
Magnetically Assembled Ni@Ag Urchin‐Like Ensembles with Ultra‐Sharp Tips and Numerous Gaps for SERS Applications
Publisher: Wiley
Date: 18-03-2014
Ferromagnetic Fe@CaS Nanopeapods with Protecting BN Tubular Sheaths
Publisher: American Chemical Society (ACS)
Date: 15-07-2009
DOI: 10.1021/JP905388Z
High-Yield Synthesis of Boron Nitride Nanoribbons via Longitudinal Splitting of Boron Nitride Nanotubes by Potassium Vapor
Publisher: American Chemical Society (ACS)
Date: 22-09-2014
DOI: 10.1021/NN504809N
Abstract: Boron nitride nanoribbons (BNNRs) are theorized to have interesting electronic and magnetic properties, but their high-yield synthesis remains challenging. Here we demonstrate that potassium-induced splitting of BN nanotubes (BNNTs) is an effective high-yield method to obtain bulk quantities of high-quality BNNRs if a proper precursor material is chosen. The resulting BNNRs are crystalline many of them have a high aspect ratio and straight parallel edges. We have observed numerous few-layer and monolayer BNNRs the multilayered ribbons predominantly have an AA' stacking. We present a detailed microscopy study of BNNRs that provides important insights into the mechanism of the formation of BNNRs from BNNTs. We also demonstrate that the BNNTs prepared by different synthetic approaches could exhibit dramatically different reactivities in the potassium splitting reaction, which highlights the need for future comparison studies of BN nanomaterials prepared using different methods to better understand their preparation-dependent physical and chemical properties.
Vapor-phase synthesis of one-dimensional ZnS, CdS, and ZnxCd1–xS nanostructures
Publisher: Walter de Gruyter GmbH
Date: 06-08-2010
Abstract: One-dimensional (1D) nanostructures have received prime attention due to their high potential in understanding fundamental physical concepts and constructing nanoscale electronic devices. ZnS and CdS, the well-known direct and wide bandgap semiconductors, have recently attracted significant research interest due to their special properties and applications in sensing, optoelectronics, piezoelectronics, and lasing. This article reviews the most recent activities in ZnS and CdS nanostructures, with an emphasis on the authors’ own results, and on 1D ZnS and CdS nanostructures, especially those synthesized using vapor deposition techniques. The review begins with a survey of ZnS and CdS nanostructures, and then is primarily focused on their 1D nanostructures, syntheses, characterizations, formation mechanisms, and optical and field-emission (FE) properties. Additionally, developments of Zn x Cd 1– x S composite nanostructures, including nanocombs and zigzag nanowires, are also discussed. Finally, we conclude this review with the perspectives and outlook on the future developments in this field.
Boron Nitride Nanosheet Coatings with Controllable Water Repellency
Publisher: American Chemical Society (ACS)
Date: 22-07-2011
DOI: 10.1021/NN201838W
Abstract: The growth, structure, and properties of two-dimensional boron nitride (BN) nanostructures synthesized by a thermal chemical vapor deposition method have been systematically investigated. Most of the BN nanosheets (BNNSs) were less than 5 nm in thickness, and their purity was confirmed by X-ray energy dispersive spectroscopy, X-ray photoelectron spectroscopy, electron energy loss spectroscopy, and Raman spectroscopy. The effects of the process variables on the morphology and roughness of the coatings were studied using atomic force microscopy and scanning electron microscopy. A smooth BN coating was obtained at 900 °C, while compact BNNS coatings composed of partially vertically aligned nanosheets could be achieved at 1000 °C and higher temperatures. These nanosheets were mostly separated and exhibited high surface area especially at higher synthesis temperatures. The nonwetting properties of the BNNS coatings were independent of the water pH and were examined by contact angle goniometry. The present results enable a convenient growth of pure BNNS coatings with controllable levels of water repellency, ranging from partial hydrophilicity to superhydrophobicity with contact angles exceeding 150°.
Ropes of BN multi-walled nanotubes
Publisher: Elsevier BV
Date: 08-2000
Recent Advances in Boron Nitride Nanotubes and Nanosheets
Publisher: Wiley
Date: 10-2010
Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide
Publisher: American Chemical Society (ACS)
Date: 31-08-2020
Production and Characterization of Coaxial Nanotube Junctions and Networks of CNx/CNT
Publisher: American Chemical Society (ACS)
Date: 21-07-2007
DOI: 10.1021/NL0706502
Abstract: Novel coaxial structures consisting of nitrogen-doped carbon nanotube (MWNTs-CNx) cores with external concentric shells of pure carbon were produced by the pyrolysis of toluene over Fe-coated MWNTs-CNx. These materials were thoroughly characterized by SEM, HRTEM, X-ray diffraction, and TGA a possible growth scenario for their formation is also proposed. In addition, these coaxial structures were able to form 2D and 3D covalent networks that mainly exhibited T-, Y-, and on-type morphologies. The two-step technique presented here could be further developed to fully control the growth of these new coaxial structures, study of in idual junctions, and it could be used to create periodic nanotube networks, in which the heterocable structure could find applications in nanoelectronics.
Evaluation of novel hollow fibre membranes for NOM removal by advanced membrane autopsy
Publisher: IWA Publishing
Date: 26-11-2016
DOI: 10.2166/WS.2015.170
Abstract: A full-scale inside out hollow fibre membrane module was operated in a pilot-scale water treatment plant in Sweden for a period of 12 months from August 2013 to July 2014. Liquid chromatography– organic carbon detection (LC-OCD) chromatogram indicated the membranes could effectively remove 86% of dissolved organic carbon and 92% of humic substances from the feedwater. Routine cleaning-in-place was conducted to remove any fouling material accumulated on the membranes. Autopsy of the aged membrane s les after 12 months’ operation suggested no significant changes were detected for the membrane s les obtained from the top, middle and bottom sections of the membrane module and were similar to the virgin membrane s le.
Self-Organized Hierarchical ZnS/SiO2 Nanowire Heterostructures
Publisher: American Chemical Society (ACS)
Date: 18-03-2006
DOI: 10.1021/JP060006W
Abstract: Novel hierarchical heterostructures formed by wrapping ZnS nanowires with highly dense SiO(2) nanowires were successfully synthesized by a vapor-liquid-solid process. The as-synthesized products were characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy equipped with an energy-dispersive X-ray spectrometer. Studies indicate that a typical hierarchical ZnS/SiO(2) heterostructure consists of a single-crystalline ZnS nanowire (core) with diameter gradually decreasing from several hundred nanometers to 20 nm and adjacent amorphous SiO(2) nanowires (branches) with diameters of about 20 nm. A possible growth mechanism was also proposed for the growth of the hierarchical heterostructures.
Real-time observation of liquid Indium unusual behavior inside silica nanotubes
Publisher: Elsevier BV
Date: 06-2005
Elastic deformation of helical-conical boron nitride nanotubes
Publisher: AIP Publishing
Date: 24-07-2003
DOI: 10.1063/1.1589738
Abstract: Boron nitride nanotubes with hollow conical-helix geometry have exhibited striking flexibility and elasticity comparable to metals. During an electron-beam induced deformation at room temperature, the nanotubes can be bent by a maximum angle as high as 180° and then retrieve the starting morphology without any evidence of structural failure. The outstanding low-temperature elasticity in this nano-material is interpreted by a theoretical model, displaying deformation processes dominated by slide of filaments along with changes in apex angles stepwise. The specific tubular geometry is believed to take advantages of both high stiffness and extraordinary flexibility of BN filaments, and easiness of interlayer slide in graphitic structure, hence leading to high resistance to fracture.
Cytocompatibility evaluation of gum Arabic-coated ultra-pure boron nitride nanotubes on human cells
Publisher: Future Medicine Ltd
Date: 05-2014
DOI: 10.2217/NNM.14.25
Abstract: Aim: Boron nitride nanotubes (BNNTs) are tubular nanoparticles with a structure analogous to that of carbon nanotubes, but with B and N atoms that completely replace the C atoms. Many favorable results indicate BNNTs as safe nanomaterials however, important concerns have recently been raised about ultra-pure, long (˜10 µm) BNNTs tested on several cell types. Materials & methods: Here, we propose additional experiments with the same BNNTs, but shortened (˜1.5 µm) with a homogenization/sonication treatment that allows for their dispersion in gum Arabic aqueous solutions. Obtained BNNTs are tested on human endothelial and neuron-like cells with several independent biocompatibility assays. Moreover, for the first time, their strong sum-frequency generation signal is exploited to assess the cellular uptake. Results & conclusion: Our data demonstrate no toxic effects up to concentrations of 20 µg/ml, once more confirming biosafety of BNNTs, and again highlighting that nanoparticle aspect ratio plays a key role in the biocompatibility evaluation. Original submitted 3 December 2013 Revised submitted 28 January 2014 Published online 6 February 2014
Stepwise Current-Driven Release of Attogram Quantities of Copper Iodide Encapsulated in Carbon Nanotubes
Publisher: American Chemical Society (ACS)
Date: 26-08-2008
DOI: 10.1021/NL8012506
Abstract: Encapsulated nanograins of copper iodide have been sequentially discharged from in idual carbon nanotubes. Using a high resolution electron microscope equipped with a two-terminal electrical measurements unit, it was possible to manipulate the filling contents with precisions of a few attograms at a time. Changes in electrical resistance and filling ratio were followed in tandem and in real-time. It is shown that the pulsed release of the halide is directly related to the overall conductance of the filled nanotube.
Ultrahigh Torsional Stiffness and Strength of Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 19-11-2012
DOI: 10.1021/NL303601D
Abstract: We report the experimental and theoretical study of boron nitride nanotube (BNNT) torsional mechanics. We show that BNNTs exhibit a much stronger mechanical interlayer coupling than carbon nanotubes (CNTs). This feature makes BNNTs up to 1 order of magnitude stiffer and stronger than CNTs. We attribute this interlayer locking to the faceted nature of BNNTs, arising from the polarity of the B-N bond. This property makes BNNTs superior candidates to replace CNTs in nanoelectromechanical systems (NEMS), fibers, and nanocomposites.
Highly Thermo-conductive Fluid with Boron Nitride Nanofillers
Publisher: American Chemical Society (ACS)
Date: 19-07-2011
DOI: 10.1021/NN201946X
Abstract: We report for the first time how boron nitride (BN) nanotubes and nanospheres may effectively be used to achieve remarkable thermal conductivity improvement of a fluid. Benefiting from high thermal conductivity and high-aspect-ratio of BN nanotubes, at a fraction of 6 vol %, the thermal conductivity of water was remarkably improved, up to ∼2.6-times. With BN nanospheres as fillers, the viscosity of the fluid can be kept decently low and thermal conductivity can also be effectively improved. A combination of BN nanotubes and nanospheres was found to increase the fluid's thermal conductivity while keeping its viscosity low, thus, such mixtures can be promising fillers for highly thermo-conductive fluids. Finally, calculations based on finite element method were used to investigate the regarded nanofluids. On the basis of the results, thermal conductivity was estimated to be more than, or close to 200 W/mK for BN nanotubes and nanospheres, respectively.
The first template-free growth of crystalline silicon microtubes
Publisher: Wiley
Date: 06-2004
Fabrication, characterization, and mechanical properties of spark plasma sintered Al–BN nanoparticle composites
Publisher: Elsevier BV
Date: 08-2015
Ru/ITO: A Carbon-Free Cathode for Nonaqueous Li–O2 Battery
Publisher: American Chemical Society (ACS)
Date: 25-09-2013
DOI: 10.1021/NL402213H
Abstract: Ru nanoparticles deposited on a conductive support indium tin oxide (Ru/ITO) were applied as a carbon-free cathode in a nonaqueous Li-O2 battery. The Li-O2 battery with Ru/ITO showed much lower charging overpotentials and better cycling performance at 0.15 mA/cm(2) than those with Super P (SP) and SP loaded with Ru nanoparticles (Ru/SP) as the cathodes. The carbon-free cathode Ru/ITO can effectively reduce formation of Li2CO3 or other Li carbonates in a discharging process, which cannot be completely decomposed upon charging, in comparison with the carbon based cathode. The improved performance of Ru/ITO can be attributed to the superior catalytic activity of Ru nanoparticles toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) and the absence of carbon that has been reported to react with Li2O2 to form Li2CO3.
Boron nitride nanotubes as vehicles for intracellular delivery of fluorescent drugs and probes
Publisher: Future Medicine Ltd
Date: 03-2016
DOI: 10.2217/NNM.15.214
Abstract: Aim: To evaluate the response of cells to boron nitride nanotubes (BNNTs) carrying fluorescent probes or drugs in their inner channel by assessment of the cellular localization of the fluorescent cargo, evaluation of the in vitro release and biological activity of a drug (curcumin) loaded in BNNTs. Methods: Cells treated with curcumin-loaded BNNTs and stimulated with lipopolysaccharide were assessed for nitric oxide release and stimulation of IL-6 and TNF-α. The cellular trafficking of two cell-permeant dyes and a non-cell-permeant dye loaded within BNNTs was imaged. Results: BNNTs loaded with up to 13 wt% fluorophores were internalized by cells and controlled release of curcumin triggered cellular pathways associated with the known anti-inflammatory effects of the drug. Conclusion: The overall findings indicate that BNNTs can function as nanocarriers of biologically relevant probes/drugs allowing one to examine/control their local intracellular localization and biochemical effects, leading the way to applications as intracellular nanosensors. [Formula: see text]
Design of BN porous sheets with richly exposed (002) plane edges and their application as TiO2 visible light sensitizer
Publisher: Elsevier BV
Date: 09-2015
High-throughput fabrication of strutted graphene by ammonium-assisted chemical blowing for high-performance supercapacitors
Publisher: Elsevier BV
Date: 09-2015
Single-source precursor for chemical vapour deposition of collapsed boron nitride nanotubes
Publisher: IOP Publishing
Date: 16-11-2006
“Chemical Blowing” of Thin‐Walled Bubbles: High‐Throughput Fabrication of Large‐Area, Few‐Layered BN and Cx‐BN Nanosheets
Publisher: Wiley
Date: 02-08-2011
ZnO Hollow Spheres with Double‐Yolk Egg Structure for High‐Performance Photocatalysts and Photodetectors
Publisher: Wiley
Date: 05-06-2012
Abstract: Inspired by opening soft drink cans, a one-pot method to prepare ZnO hollow spheres with double-yolk egg (DEH) architectures is developed. The bubble-assisted Ostwald ripening is proposed for the formation of these novel structures. Uniqueness of DEHs morphology led to greatly enhanced photocatalytic activity and photodetector performance. The newly developed synthetic concept and the obtained novel morphologies should pave the way towards the design and fabrication of other similar materials with enhanced properties for microelectronics, optoelectronics, and other applications.
Natural versus wastewater derived dissolved organic carbon: Implications for the environmental fate of organic micropollutants
Publisher: Elsevier BV
Date: 08-2011
DOI: 10.1016/J.WATRES.2011.05.038
Abstract: The interaction of organic micropollutants with dissolved organic carbon (DOC) can influence their transport, degradation and bioavailability. While this has been well established for natural organic carbon, very little is known regarding the influence of DOC on the fate of micropollutants during wastewater treatment and water recycling. Dissolved organic carbon-water partition coefficients (K(DOC)) for wastewater derived and reference DOC were measured for a range of micropollutants using a depletion method with polydimethylsiloxane disks. For micropollutants with an octanol-water partition coefficient (log K(OW)) greater than 4 there was a significant difference in K(DOC) between reference and wastewater derived DOC, with partitioning to wastewater derived DOC over 1000 times lower for the most hydrophobic micropollutants. The interaction of nonylphenol with wastewater derived DOC from different stages of a wastewater and advanced water treatment train was studied, but little difference in K(DOC) was observed. Organic carbon characterisation revealed that reference and wastewater derived DOC had very different properties due to their different origins. Consequently, the reduced sorption capacity of wastewater derived DOC may be related to their microbial origin which led to reduced aromaticity and lower molecular weight. This study suggests that for hydrophobic micropollutants (log K(OW) > 4) a higher concentration of freely dissolved and thus bioavailable micropollutants is expected in the presence of wastewater derived DOC than predicted using K(DOC) values quantified using reference DOC. The implication is that naturally derived DOC may not be an appropriate surrogate for wastewater derived DOC as a matrix for assessing the fate of micropollutants in engineered systems.
Interface engineering of bio-inspired Boron nitride nano-architectures toward controllable hydrophobicity/hydrophilicity
Publisher: IEEE
Date: 04-2015
Effect of Electron Beam Irradiation and Heating on the Structural Stability of Sulphide-Filled Carbon Nanotubes
Publisher: Oxford University Press (OUP)
Date: 08-2012
DOI: 10.1017/S1431927612013049
Abstract: In recent years there has been an increased interest in characterisation methods capable of evaluating the response of nanostructured materials such as quantum dots and nanotubes to externally applied stimuli. However, due to issues concerning s le homogeneity and non-uniform orientation, the study of collective responses can lead to ambiguous results. Therefore, it is crucial to perform a complementary evaluation at the single nanostructure level which requires the use of sophisticated analytical instrumentation. In addition to high spatial resolution, the equipment employed must permit s le manipulation and real-time imaging of the in situ stimulus response. Transmission electron microscopes (TEM) observe all these requirements. Furthermore, novel developments in s le holder design and manufacturing have opened a window to an unprecedented range of new in situ experiments. As a result, varied reports are increasingly populating the in situ TEM literature examining such different matters as temperature-related structural phase changes of nanoparticles or dopant diffusion in nanoscaled batteries.
Insulating `nanocables': Invar Fe–Ni alloy nanorods inside BN nanotubes
Publisher: Elsevier BV
Date: 10-2001
Synthesis of boron nitride nanostructures from borates of alkali and alkaline earth metals
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA05831G
Abstract: Boron nitride nanostructures (nanotubes, graphene-like petals, and columnar porous flakes) grew in reactions of alkali and alkaline earth borates with ammonia.
Semiconductor nanochannels in metallic carbon nanotubes by thermomechanical chirality alteration.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 24-12-2021
Abstract: [Figure: see text].
Heteroepitaxial Growth of ZnO Nanorod Arrays on GaAs (111) Substrates by Electrochemical Deposition
Publisher: Wiley
Date: 18-08-2010
Abstract: Heteroepitaxial growth of well‐aligned ZnO nanorod arrays on GaAs (111) substrates was achieved through electrochemical deposition at low temperature without any buffer layers for the first time. Structural analysis demonstrated the epitaxial orientation relationship of ZnO(0001)//GaAs(111). The rod density was dependent on the applied current density. These ZnO nanorods had high crystalline quality andexhibited strong UV near‐edge photoluminescence with a 106 meV full‐width at half‐maximum and very weak deep level emission. Furthermore, the patterned growth was facially implemented by using surface masks on cathode substrates. These results are envisaged to advance the development of ZnO nanorod‐based heterojunctions and their applications in optoelectronics.
Unveiling the Working Mechanism of Graphene Bubble Film/Silicon Composite Anodes in Li-Ion Batteries: From Experiment to Modeling
Publisher: American Chemical Society (ACS)
Date: 14-11-2019
Self-catalyst growth and optical properties of novel SnO2 fishbone-like nanoribbons
Publisher: Elsevier BV
Date: 05-2003
Superior Performance of a Li–O2 Battery with Metallic RuO2 Hollow Spheres as the Carbon‐Free Cathode
Publisher: Wiley
Date: 08-05-2015
Near-Field Infrared Pump–Probe Imaging of Surface Phonon Coupling in Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 07-01-2016
DOI: 10.1021/ACS.JPCLETT.5B02438
Abstract: Surface phonon modes are lattice vibrational modes of a solid surface. Two common surface modes, called longitudinal and transverse optical modes, exhibit lattice vibration along or perpendicular to the direction of the wave. We report a two-color, infrared pump-infrared probe technique based on scattering type near-field optical microscopy (s-SNOM) to spatially resolve coupling between surface phonon modes. Spatially varying couplings between the longitudinal optical and surface phonon polariton modes of boron nitride nanotubes are observed, and a simple model is proposed.
Development of a mobile groundwater desalination system for communities in rural India
Publisher: Elsevier BV
Date: 11-2018
DOI: 10.1016/J.WATRES.2018.08.001
Abstract: The consumption of saline groundwater has contributed to a growing incidence of renal diseases, particularly in coastal communities of India. Although reverse osmosis (RO) is routinely used to remove salt from groundwater, conventional RO systems (i.e. centralized systems using spiral wound RO elements) have limited utility in these communities due to high capital and maintenances costs, and lack of infrastructure to distribute the water. Consequently, there is a need to develop an appropriate solution for groundwater treatment based on small-scale, mobile and community-led systems. In this work, we designed a mobile desalination system to provide a simple platform for water treatment and delivery of goods to rural communities. The system employs tubular RO membranes packed in a single, low-profile vessel which fits below the cargo space. The low-profile enables minimal intrusion on the space available for the transportation of goods. Pressure is delivered by a belt driven clutch pump, powered by the engine. Water is treated locally by connecting the intake to the village well while the vehicle idles. A combined numerical and experimental approach was used to optimise the module/system design, resulting in ∼20% permeate flux enhancement. Experimental results revealed that the system can produce 16 L per square meter of membrane area per hour (LMH) at a salinity level of 80 ppm from a ∼2000 ppm groundwater when it is feed at 1 m
Three-dimensional electrode with conductive Cu framework for stable and fast Li-ion storage
Publisher: Elsevier BV
Date: 03-2018
Perfectly Dissolved Boron Nitride Nanotubes Due to Polymer Wrapping
Publisher: American Chemical Society (ACS)
Date: 11-2005
DOI: 10.1021/JA053917C
Abstract: We report for the first time that boron nitride nanotubes (BNNTs) may be dissolved in organic solvents by wrapping them with a polymer. Transmission electron microscopy and cathodoluminescence studies indicate the strong pi-pi interactions between BNNTs and the polymer. A band gap ranging from 5.2 to 5.5 eV was documented for the BNNTs independent of their geometrical characteristics by using ultraviolet-visible absorption experiments on composite films and thin BNNT films prepared from solutions.
Sodium flux-assisted low-temperature high-pressure synthesis of carbon nitride with high nitrogen content
Publisher: Elsevier BV
Date: 05-2003
High-symmetry ZnS hepta- and tetrapods composed of assembled ZnS nanowire arrays
Publisher: AIP Publishing
Date: 19-03-2007
DOI: 10.1063/1.2716242
Abstract: Sixfold symmetry heptapodlike and threefold symmetry tetrapodlike ZnS structures have been fabricated by thermal evaporation of a ZnS and SiO mixture source in N2 at 1300°C. Both the heptapods and tetrapods have been formed by the self-assembly of ZnS nanowires with the preferred (0001) orientations. Structures and morphologies of the obtained heptapods and tetrapods are thoroughly studied using x-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. Room-temperature photoluminescence spectra taken from the nanostructures show a strong green emission centered at 550nm.
Flexible conductive polymer composite materials based on strutted graphene foam
Publisher: Elsevier BV
Date: 06-2021
Tube‐in‐Tube TiO2 Nanotubes with Porous Walls: Fabrication, Formation Mechanism, and Photocatalytic Properties
Publisher: Wiley
Date: 27-12-2010
Structural analysis and atomic simulation of Ag/BN nanoparticle hybrids obtained by Ag ion implantation
Publisher: Elsevier BV
Date: 05-2016
Erratum to: Metal ion implantation of multi-walled Boron Nitride nanotubes [Scripta Materialia 67 (2012) 507–510]
Publisher: Elsevier BV
Date: 08-2013
Microstructure and catalytic properties of Fe3O4/BN, Fe3O4(Pt)/BN, and FePt/BN heterogeneous nanomaterials in CO2 hydrogenation reaction: Experimental and theoretical insights
Publisher: Elsevier BV
Date: 10-2021
Mechanical and Thermal Properties of Polymethyl Methacrylate-BN Nanotube Composites
Publisher: Hindawi Limited
Date: 2008
DOI: 10.1155/2008/642036
Abstract: Polymethyl methacrylate (PMMA)-BN nanotube (BNNT) composites were fabricated and their mechanical and thermal properties were analyzed. Using a 1 wt.% BNNTs fraction in a polymer, the elastic modulus of PMMA was increased up to 19%. In addition, thermal stability and glass transition temperature of PMMA were also positively affected. The thermal conductivity of PMMA with BNNT additions increased three times. The resultant BNNT-PMMA composites possess the high electrical breakover voltages. Thus our studies clearly indicate that BNNTs are promising nanofillers for improvement of mechanical and thermal conductivity of dielectric polymers under preservation of their electrical insulation.
Characterization, Cathodoluminescence, and Field‐Emission Properties of Morphology‐Tunable CdS Micro/Nanostructures
Publisher: Wiley
Date: 03-08-2009
In situ cyclic telescoping of multi-walled carbon nanotubes in a transmission electron microscope
Publisher: Elsevier BV
Date: 10-2016
Exploring Aluminum-Ion Insertion into Magnesium-Doped Manjiroite (MnO2) Nanorods in Aqueous Solution
Publisher: Wiley
Date: 23-12-2021
Growth of spherical boron oxynitride nanoparticles with smooth and petalled surfaces during a chemical vapour deposition process
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CE01126H
New Ultraviolet Photodetector Based on Individual Nb2O5 Nanobelts
Publisher: Wiley
Date: 08-09-2011
Electron-beam induced electric-hydraulic expansion in a silica-shelled gallium microball-nanotube structure
Publisher: AIP Publishing
Date: 22-08-2011
DOI: 10.1063/1.3625427
Field electron emission from carbon nanotubes coated on TiSi/sub 2/ buffer layer
Publisher: IEEE
Date: 2005
Pectin-coated boron nitride nanotubes: In vitro cyto-/immune-compatibility on RAW 264.7 macrophages
Publisher: Elsevier BV
Date: 04-2016
DOI: 10.1016/J.BBAGEN.2016.01.020
Abstract: Boron nitride nanotubes (BNNTs) represent a new opportunity for drug delivery and clinical therapy. The present work has the objective to investigate pectin-coated BNNTs (P-BNNTs) for their biocompatibility on macrophage cultures, since these cells are among the first components of the immune system to interact with administered nanoparticles. As first step, the potential toxicity of P-BNNTs is verified in terms of proliferation, oxidative stress induction and apoptosis/necrosis phenomena. Thereafter, the modulation of immune cell response following P-BNNT exposure is evaluated at gene and protein level, in particular focusing on cytokine release. Finally, P-BNNT internalization is assessed through transmission electron microscopy and confocal microscopy. The results proved that P-BNNTs are not toxic for macrophages up to 50 μg/ml after 24 h of incubation. The cytokine expression is not affected by P-BNNT administration both at gene and protein level. Moreover, P-BNNTs are internalized by macrophages without impairments of the cell structures. Collected data suggest that P-BNNTs cause neither adverse effects nor inflammation processes in macrophages. These findings represent the first and fundamental step in immune compatibility evaluation of BNNTs, mandatory before any further pre-clinical testing.
Li‐O2 Battery Based on Highly Efficient Sb‐Doped Tin Oxide Supported Ru Nanoparticles
Publisher: Wiley
Date: 26-05-2014
Abstract: Novel cathodes based on Sb-doped tin oxide (STO)-supported Ru particles enable Li-O2 batteries to be operated below 4.0 V, which is of crucial importance for the realization of rechargeable Li-O2 batteries, and to deliver a high specific capacity of 750 mA h g(-1) even after 50 discharge-charge cycles at 0.1 mA cm(-2) .
Production and Characterization of Single-Crystal FeCo Nanowires Inside Carbon Nanotubes
Publisher: American Chemical Society (ACS)
Date: 28-01-2005
DOI: 10.1021/NL0479583
Abstract: We describe the synthesis of novel monocrystalline FeCo nanowires encapsulated inside multiwalled carbon nanotubes (MWNTs). These FeCo nanowires exhibit homogeneous Fe and Co concentrations and do not contain an external oxide layer due to the presence of insulating nanotube layers. The method involves the aerosol thermolysis of toluene-ferrocene-cobaltocene solutions in inert atmospheres. The materials have been carefully characterized using state-of-the-art high-resolution transmission electron microscopy (HRTEM), electron-energy-loss spectroscopy (EELS), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), electron diffraction, HREELS-STM elemental mapping, X-ray powder diffraction, and SQUID magnetometry. We noted that the formation of FeCo alloys occurs at relatively low pyrolytic temperatures (e.g., 650-750 degrees C). These single-crystal nanowires, which have not been reported hitherto, always exhibit the FeCo (110) plane parallel to the carbon nanotube axis. The FeCo nanomaterials have shown large coercive fields at room temperature (e.g., 900 Oe). We envisage that these aligned ferromagnetic nanowires could be used in the fabrication of high-density magnetic storage devices and magnetic composites.
Nacre-bionic nanocomposite membrane for efficient in-plane dissipation heat harvest under high temperature
Publisher: Elsevier BV
Date: 03-2021
Synthesis of boron nitride nanofibers and measurement of their hydrogen uptake capacity
Publisher: AIP Publishing
Date: 19-12-2002
DOI: 10.1063/1.1534415
Abstract: High-purity boron nitride (BN) nanofibers with diameters ranging from 30 to 100 nm were synthesized. Electron energy loss spectroscopy revealed that they have stoichiometric BN composition. The hydrogen uptake capacity measurements showed that the fibers could adsorb 2.9 wt % hydrogen under ∼10 MPa at room temperature. This hydrogen uptake capacity was compared with those of BN multiwalled or bamboo-like nanotubes under the same experimental conditions. It was suggested that the unique morphology of nanofibers, namely open-ended BN edge layers on the exterior surface, might facilitate hydrogen adsorption.
Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties
Publisher: Wiley
Date: 11-01-2005
Solution Growth and Cathodoluminescence of Novel SnO2 Core−Shell Homogeneous Microspheres
Publisher: American Chemical Society (ACS)
Date: 13-04-2010
DOI: 10.1021/JP100942M
Microstructure evolution during AlSi10Mg molten alloy/BN microflake interactions in metal matrix composites obtained through 3D printing
Publisher: Elsevier BV
Date: 04-2021
Heterojunctions between metals and carbon nanotubes as ultimate nanocontacts
Publisher: Proceedings of the National Academy of Sciences
Date: 24-03-2009
Abstract: We report the controlled formation and characterization of heterojunctions between carbon nanotubes and different metal nanocrystals (Fe, Co, Ni, and FeCo). The heterojunctions are formed from metal-filled multiwall carbon nanotubes (MWNTs) via intense electron beam irradiation at temperatures in the range of 450–700 °C and observed in situ in a transmission electron microscope. Under irradiation, the segregation of metal and carbon atoms occurs, leading to the formation of heterojunctions between metal and graphite. Metallic conductivity of the metal–nanotube junctions was found by using in situ transport measurements in an electron microscope. Density functional calculations show that these structures are mechanically strong, the bonding at the interface is covalent, and the electronic states at and around the Fermi level are delocalized across the entire system. These properties are essential for the application of such heterojunctions as contacts in electronic devices and vital for the fabrication of robust nanotube–metal composite materials.
Flexible SnO2 hollow nanosphere film based high-performance ultraviolet photodetector
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC39273B
Abstract: A high-quality SnO(2) hollow-sphere nanofilm based flexible photodetector was constructed via'water-oil' interfacial assembling. The photodetector showed high sensitivity, superb stability, and was also able to bear significant external mechanical forces.
Low-cost fully transparent ultraviolet photodetectors based on electrospun ZnO-SnO2 heterojunction nanofibers
Publisher: Wiley
Date: 08-07-2013
Abstract: Electrospun ZnO-SnO2 heterojunction nanofibers are demonstrated to be promising candidates for easily assembled fully transparent high-performance photodetectors.
Single‐Crystalline α‐Al2O3 Nanotubes Converted from Al4O4C Nanowires
Publisher: Wiley
Date: 24-05-2005
An alternative membrane treatment process to produce low-salt and high-nutrient recycled water suitable for irrigation purposes
Publisher: Elsevier BV
Date: 07-2011
An integrated, solar-driven membrane distillation system for water purification and energy generation
Publisher: Elsevier BV
Date: 03-2019
Synthesis of CeB6 thin films by physical vapor deposition and their field emission investigations
Publisher: Elsevier BV
Date: 2012
Spent graphite from end-of-life Li-ion batteries as a potential electrode for aluminium ion battery
Publisher: Elsevier BV
Date: 12-2020
Structure and Property of Boron Nitride Nanotubes
Publisher: The Carbon Society of Japan
Date: 2003
Mechanical properties and current-carrying capacity of Al reinforced with graphene/BN nanoribbons: a computational study
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6NR07206B
Abstract: Record high values of Young's modulus and tensile strength of graphene and BN nanoribbons as well as their chemically active edges make them promising candidates for serving as fillers in metal-based composite materials. Herein, using ab initio and analytical potential calculations we carry out a systematic study of the mechanical properties of nanocomposites constructed by reinforcing an Al matrix with BN and graphene nanoribbons. We consider a simple case of uniform distribution of nanoribbons in an Al matrix under the assumption that such configuration will lead to the maximum enhancement of mechanical characteristics. We estimate the bonding energy and the interfacial critical shear stress at the ribbon/metal interface as functions of ribbon width and show that the introduction of nanoribbons into the metal leads to a substantial increase in the mechanical characteristics of the composite material, as strong covalent bonding between the ribbon edges and Al matrix provides efficient load transfer from the metal to the ribbons. Using the obtained data, we apply the rule of mixtures in order to analytically assess the relationship between the composite strength and concentration of nanoribbons. Finally, we study carbon chains, which can be referred to as the ultimately narrow ribbons, and find that they are not the best fillers due to their weak interaction with the Al matrix. Simulations of the electronic transport properties of the composites with graphene nanoribbons and carbyne chains embedded into Al show that the inclusion of the C phase gives rise to deterioration in the current carrying capacity of the material, but the drop is relatively small, so that the composite material can still transmit current well, if required.
Phonon characteristics and cathodolumininescence of boron nitride nanotubes
Publisher: AIP Publishing
Date: 18-05-2005
DOI: 10.1063/1.1938002
Abstract: Large quantities of highly pure boron nitride nanotubes (BNNTs) are synthesized through a carbon-free method. Nanotube phonon features are investigated by Raman and Fourier-transformed infrared spectroscopies. Both methods indicate highly pure boron nitride phase. Intense ultraviolet light emission is observed when BNNTs are excited by an electron beam, which indicates that the present BNNTs have potential applications in ultraviolet optical devices.
Triangular ZnO Nanosheets: Synthesis, Crystallography and Cathodoluminescence
Publisher: American Scientific Publishers
Date: 08-2013
Abstract: ZnO nanosheets with triangular morphology have been synthesized on an Au-coated silicon substrate through a facile thermal evaporation process. The morphologies and microstructures of the nanosheets were studied by a scanning electron microscope (SEM) and a high-resolution transmission electron microscope (HR-TEM). These studies show that a nanosheet is commonly composed of two parts: a triangular ZnO sheet and an Au nanoparticle attached on its tip-end. Detailed crystallography analyses conclude that the formation of the highly crystalline nanostructures can be assigned to a combination of a vapor-liquid-solid (VLS) process that is believed to be responsible for its initial nucleation and subsequent crystallization along the growth direction, and a vapor-solid (VS) process that is responsible for its further radial growth. The spatially-resolved cathodoluminescence (CL) spectra exhibit a sharp strong near-band-edge (NBE) emission in the ultraviolet range and a negligible green emission.
Synthesis and magnetic study for Ga1−xMnxN whiskers
Publisher: Elsevier BV
Date: 03-2005
Ion irradiation of multi‐walled boron nitride nanotubes
Publisher: Wiley
Date: 23-03-2010
Abstract: Multi‐walled boron nitride nanotubes were irradiated with low and medium energy argon and helium ions at room and elevated temperatures. The irradiated s les were characterized by transmission electron microscopy and Raman spectroscopy, and a comparison to the response of carbon nanotubes to irradiation was made. A dose of 2 × 10 15 ions/cm 2 was found to give rise to complete amorphization for irradiation with 40 keV Ar ions,while a comparable dose (in terms of displacement per atom) of 1.2 × 10 18 ions/cm 2 for 350 keV He caused significantly less damage. Elevated temperatures considerably reduce the amount of damage indicating that efficient annealing of defects occurs in BN nanotubes already at 300 0 C. Our results provide evidence that multi‐walled BN nanotubes have similar or even better stability under ion irradiation than their carbon counterparts. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Effect of Al-rich off-stoichiometry on the yield stress of binary Ni3Al single crystals
Publisher: Elsevier BV
Date: 05-1998
Impact of module design in forward osmosis and pressure assisted osmosis: An experimental and numerical study
Publisher: Elsevier BV
Date: 2018
Sonication-assisted alcoholysis of boron nitride nanotubes for their sidewalls chemical peeling
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CC00388A
Abstract: We demonstrated that sonication treatment of boron nitride nanotubes (BNNTs) in primary alcohols had led to chemical peeling of their sidewalls through alcoholysis, followed by production of boron nitride nanoribbons (BNNRs).
Synthesis, HRTEM and electron diffraction studies of B/N-doped C and BN nanotubes
Publisher: Elsevier BV
Date: 2001
InP-GaP Bi-Coaxial Nanowires and Amorphous GaP Nanotubes
Publisher: American Chemical Society (ACS)
Date: 09-02-2007
DOI: 10.1021/JP067691R
High—Performance Solar‐Blind Deep Ultraviolet Photodetector Based on Individual Single‐Crystalline Zn2GeO4 Nanowire
Publisher: Wiley
Date: 18-12-2015
Al-based composites reinforced with AlB2, AlN and BN phases: Experimental and theoretical studies
Publisher: Elsevier BV
Date: 03-2018
h-BN nanosheets as simple and effective additives to largely enhance the activity of Au/TiO2 plasmonic photocatalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP05958E
Abstract: Au/TiO 2 plasmonic photocatalysts showed largely enhanced activity for the oxidation of formic acid in water into CO 2 when simply mixed with h-BN nanosheets, as a result of electron transfer from photoexcited Au/TiO 2 to the additive to retard charge recombination.
Growth of Single‐Crystal Indium Nitride Nanotubes and Nanowires by a Controlled‐Carbonitridation Reaction Route.
Publisher: Wiley
Date: 15-12-2004
CFD modelling of uneven flows behaviour in flat-sheet membrane bioreactors: From bubble generation to shear stress distribution
Publisher: Elsevier BV
Date: 2019
Hollow boron nitride (BN) nanocages and BN-nanocage-encapsulated nanocrystals
Publisher: Wiley
Date: 22-07-2004
Abstract: Hollow boron nitride (BN) nanocages (nanospheres, image on the left) and BN-nanocage-encapsulated GaN nanocrystals (right) have been synthesized by using a homemade B-N-O precursors. The as-prepared BN hollow nanocages have typically spherical morphologies with diameters ranging from 30 to 200 nm. The nanocages have crystalline structures. Peanutlike nanocages with double walls have also been observed their internal space is ided into seperated compartments by the internal walls. The method is extended to sheathe nanocrystals with BN nanocages BN-shell/GaN-core nanostructures have been successfully fabriacted. The method may be generally applicable to the fabrication BN-sheathed nanocrystals.
Growth of Large‐Scale Boron Nanowire Patterns with Identical Base‐Up Mode and In Situ Field Emission Studies of Individual Boron Nanowire
Publisher: Wiley
Date: 11-09-2013
Abstract: Boron nanowires (BNWs) are considered as an ideal optoelectronic nanomaterial, but controlling them in identical growth mode and large-area patterns is technically challenging. Here, large-scale BNW patterns with a uniform base-up growth mode are successfully fabricated by choosing Ni film as the catalyst. Moreover, they exhibit low turn-on field (4.3 V/μm) and excellent field emission uniformity (88%).
Low-dimensional boron nitride nanomaterials
Publisher: Elsevier BV
Date: 06-2012
In situ growth of Indium nanocrystals on InP nanorods mediated by electron beam of transmission electron microscope
Publisher: Elsevier BV
Date: 12-2005
Solid Solution, Phase Separation, and Cathodoluminescence of GaP–ZnS Nanostructures
Publisher: American Chemical Society (ACS)
Date: 13-09-2013
DOI: 10.1021/AM4027949
Abstract: Quaternary solid-solution nanowires made of GaP and ZnS have been synthesized through well-designed synthetic routines. The as-synthesized GaP-ZnS solid-solution nanowires exhibit decent crystallinity with the GaP phase as the host, while a large amount of twin structural defects are observed in ZnS-rich nanowires. Cathodoluminescence studies showed that GaP-rich solid-solution nanowires have a strong visible emission centered at 600 nm and the ZnS-rich solid-solution nanowires exhibited a weak emission peak in the UV range and a broad band in the range 400-600 nm. The formation mechanism, processes, and optical emissions of GaP-ZnS solid-solution nanowires were discussed in detail.
Filling boron nitride nanotubes with metals
Publisher: Springer Science and Business Media LLC
Date: 03-2003
Nanocomposites: synthesis and elemental mapping of aligned B–C–N nanotubes
Publisher: Elsevier BV
Date: 07-2002
An Efficient Way to Assemble ZnS Nanobelts as Ultraviolet‐Light Sensors with Enhanced Photocurrent and Stability
Publisher: Wiley
Date: 27-01-2010
Structure and Cathodoluminescence of Individual ZnS/ZnO Biaxial Nanobelt Heterostructures
Publisher: American Chemical Society (ACS)
Date: 08-08-2008
DOI: 10.1021/NL801353C
Abstract: We report on a controlled synthesis of two novel semiconducting heterostructures: heterocrystalline-ZnS/single-crystalline-ZnO biaxial nanobelts and side-to-side single-crystalline ZnS/ZnO biaxial nanobelts via a simple one-step thermal evaporation method. In the first heterostructure, a ZnS domain is composed of the heterocrystalline superlattice (3C-ZnS) N /(2H-ZnS) M [111]-[0001] with the atomically smooth interface between wurtzite and zinc blende ZnS fragments. High-spatial resolution cathodoluminescence studies on in idual heterostructures for the first time reveal a new ultraviolet emission peak ( approximately 355 nm), which is not observed in separate ZnS or ZnO nanostructures. The present hererostructures are expected to become valuable not only with respect to fundamental research but also for a design of new broad-range ultraviolet nanoscale lasers and sensors.
Structure and yield strength of directionally solidified Ni3Al intermetallic premelted with MoSi2 phase
Publisher: Elsevier BV
Date: 1999
Effect of Size-Dependent Thermal Instability on Synthesis of Zn2SiO4-SiO x Core–Shell Nanotube Arrays and Their Cathodoluminescence Properties
Publisher: Springer Science and Business Media LLC
Date: 10-02-2010
Unique morphologies of boron nitride nanotubes
Publisher: AIP Publishing
Date: 16-07-2001
DOI: 10.1063/1.1385188
Abstract: Unusual morphological features of boron nitride nanotubes produced via metal–oxide-promoted high-temperature syntheses from carbon nanotubes, boron oxide, and nitrogen were observed using high-resolution transmission electron microscopy. The tubes normally displayed open ends and preferentially two or four tubular layers as revealed by statistical analysis of 600 nanotubes. In addition, the total amount of tubes with even number of shells (61% occurrence) markedly prevailed over that with odd number of shells (39%). All three characteristics are exceptional for BN compared to other layered materials which may be assembled in tubules.
Synthesis of Crystalline Silicon Tubular Nanostructures with ZnS Nanowires as Removable Templates
Publisher: Wiley
Date: 17-12-2004
Isolation of Individual Boron Nitride Nanotubes via Peptide Wrapping
Publisher: American Chemical Society (ACS)
Date: 18-03-2010
DOI: 10.1021/JA910244B
Abstract: The isolation of in idual boron nitride nanotubes (BNNTs) in aqueous phases has been achieved for the first time from raw materials based on the combination of peptide wrapping with a sonication procedure. Atomic force microscopic observations revealed the representative height and length of in idual BNNTs. Fluorescence and infrared absorption spectra suggested the strong pi-pi interactions between BNNTs and the peptide. The absorption maxima of BNNTs were significantly blue-shifted from 200 nm for the original BNNTs to 193 nm. The modulation of the BNNT band gap with peptide wrapping promises potential applications of the peptide/BNNT complexes to various nanotechnologies.
Nanometer-scale mapping of defect-induced luminescence centers in cadmium sulfide nanowires
Publisher: AIP Publishing
Date: 13-03-2017
DOI: 10.1063/1.4978603
Abstract: The luminescence centers in cadmium sulfide (CdS) nanowires are mapped through cathodoluminescence experiments inside a high resolution transmission electron microscope. This is made possible by positioning an optical fiber within a few micrometers of the area of interest and scanning the focused electron beam while simultaneously collecting the generated photons. The results reveal the distribution of luminescence centers in this material with nanometer-precision. Furthermore, these centers are associated with various intrinsic defects in CdS, which allows mapping these defects even when their concentration is far below the level detectable by other traditional techniques.
Size-Tunable Synthesis of SiO2 Nanotubes via a Simple In Situ Templatelike Process
Publisher: American Chemical Society (ACS)
Date: 24-10-2006
DOI: 10.1021/JP064537W
Abstract: SiO(2) nanotubes with tunable diameters and lengths have been successfully synthesized via a simple in situ templatelike process by thermal evaporation of SiO, ZnS, and GaN in a vertical induction furnace. The structure and morphologies were systematically investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectrometry. Studies found that both the diameters and lengths of the SiO(2) nanotubes can be effectively tuned by simply changing the reaction temperatures. The range of changes was from 30 nm (diameter) and several hundred micrometers (length) at 1450 degrees C to 100 nm (diameter) and 2-10 micrometers (length) at 1300 degrees C. Varying some other experimental parameters results in the formation of additional SiO(2)-based nanostructures, such as core-shell ZnS-SiO(2) nanocables, ZnS nanoparticle filled SiO(2) nanotubes, and fluffy SiO(2) spheres. Based on the observations, an in situ templatelike process was proposed to explain the possible growth mechanism.
Enhanced Field Emission and Optical Properties of Controlled Tapered ZnS Nanostructures
Publisher: American Chemical Society (ACS)
Date: 28-03-2012
DOI: 10.1021/JP3010635
Dispersion of Boron Nitride Nanotubes in Aqueous Solution by Simple Aromatic Molecules
Publisher: American Scientific Publishers
Date: 04-2014
Abstract: We report that the simple aromatic molecules successfully disentangle and disperse multi-walled boron nitride nanotubes (BNNTs) in aqueous solutions through pi-pi stacking interactions. Aromatic molecules such as derivatives of naphthalene, anthracene, and pyrene were used as dispersants and components for construction of nanohybrids. Spectroscopic analyses of water-dispersed BNNTs revealed that not only numbers of aromatic rings but also substituted functional groups were essential for dispersion capabilities. It was suggested that greater numbers of aromatic rings and a carboxylic acid as the substituted group showed higher dispersion capabilities among the molecules used in this study. Detailed microscopic analyses using atomic force microscopy and transmission electron microscopy showed certain isolation capabilities of the aromatic molecules for BNNTs in aqueous solution. Moreover, fluorescence spectra indicated that BNNTs and the aromatic molecules have different electronic states after hybrid formation. Our results using the simple aromatic molecules will be utilized as a basic data for dispersion of BNNTs and construction of disentangled BNNT nanohybrids effectively.
Organic Fouling of Ultrafiltration Membrane: Detailed Characterization by Liquid Chromatography with Organic Carbon Detector (LC-OCD)
Publisher: Informa UK Limited
Date: 12-2012
Unusual formation of α-Fe2O3 hexagonal nanoplatelets in N-doped sandwiched graphene chamber for high-performance lithium-ions batteries
Publisher: Elsevier BV
Date: 03-2013
Catalyzed Collapse and Enhanced Hydrogen Storage of BN Nanotubes
Publisher: American Chemical Society (ACS)
Date: 13-11-2002
DOI: 10.1021/JA028051E
Abstract: The novel morphology of BN nanotubes with a collapsed structure has been discovered by a metal-catalyzed treatment. The collapse causes the dramatic enlargement of a specific surface area of BN nanotubes and remarkably enhances the hydrogen storage capacity of BN nanotubes.
Ultrahigh quantum efficiency of CuO nanoparticle decorated In2Ge2O7 nanobelt deep-ultraviolet photodetectors
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2NR31791E
Abstract: Although there has been significant progress in the fabrication and performance optimization of 1-D nanostructure-based deep-ultraviolet photodetectors, it is still a challenge to develop an effective device with high performance characteristics, such as high photocurrent-dark current ratio and high quantum efficiency. Herein, an efficient and simple method to fabricate high performance CuO nanoparticle decorated In(2)Ge(2)O(7) nanobelt deep-ultraviolet photodetectors is presented. A CuO coated In(2)Ge(2)O(7) nanobelt based photodetector showed very high responsivity (7.34 × 10(5) A W(-1)) and high quantum efficiency (3.5 × 10(6)). The underlying mechanism is proposed to be the formation of p-n heterojunctions between decorated nanoparticles and nanobelts, which enhances the spatial separation of photogenerated electrons and holes. This study opens up a new horizon for creation of novel photodetectors with high quantum efficiency.
Direct Force Measurements and Kinking under Elastic Deformation of Individual Multiwalled Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 06-2007
DOI: 10.1021/NL070863R
High-performance Schottky solar cells using ZrS2 nanobelt networks
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1EE01286J
Densely Interconnected Porous BN Frameworks for Multifunctional and Isotropically Thermoconductive Polymer Composites
Publisher: Wiley
Date: 03-06-2018
Toward Stronger Al–BN Nanotube Composite Materials: Insights into Bonding at the Al/BN Interface from First-Principles Calculations
Publisher: American Chemical Society (ACS)
Date: 10-11-2014
DOI: 10.1021/JP509505J
A comprehensive analysis of the CVD growth of boron nitride nanotubes
Publisher: IOP Publishing
Date: 03-05-2012
DOI: 10.1088/0957-4484/23/21/215601
Abstract: Boron nitride nanotube (BNNT) films were grown on silicon/silicon dioxide (Si/SiO(2)) substrates by a catalytic chemical vapor deposition (CVD) method in a horizontal electric furnace. The effects of growth temperature and catalyst concentration on the morphology of the films and the structure of in idual BNNTs were systematically investigated. The BNNT films grown at 1200 and 1300 °C consisted of a homogeneous dispersion of separate tubes in random directions with average outer diameters of ~30 and ~60 nm, respectively. Meanwhile, the films grown at 1400 °C comprised of BNNT bundles in a flower-like morphology, which included thick tubes with average diameters of ~100 nm surrounded by very thin ones with diameters down to ~10 nm. In addition, low catalyst concentration led to the formation of BNNT films composed of entangled curly tubes, while high catalyst content resulted in very thick tubes with diameters up to ~350 nm in a semierect flower-like morphology. Extensive transmission electron microscopy (TEM) investigations revealed the diameter-dependent growth mechanisms for BNNTs namely, thin and thick tubes with closed ends grew by base-growth and tip-growth mechanisms, respectively. However, high catalyst concentration motivated the formation of filled-with-catalyst BNNTs, which grew open-ended with a base-growth mechanism.
Growth of Single-Crystalline Cubic GaN Nanotubes with Rectangular Cross-Sections
Publisher: Wiley
Date: 18-08-2004
Chemically Activated Boron Nitride Nanotubes
Publisher: Wiley
Date: 30-09-2009
Stable single atomic silver wires assembling into a circuitry-connectable nanoarray
Publisher: Springer Science and Business Media LLC
Date: 19-02-2021
DOI: 10.1038/S41467-021-21462-3
Abstract: Atomic metal wires have great promise for practical applications in devices due to their unique electronic properties. Unfortunately, such atomic wires are extremely unstable. Here we fabricate stable atomic silver wires (ASWs) with appreciably unoccupied states inside the parallel tunnels of α-MnO 2 nanorods. These unoccupied Ag 4 d orbitals strengthen the Ag–Ag bonds, greatly enhancing the stability of ASWs while the presence of delocalized 5 s electrons makes the ASWs conducting. These stable ASWs form a coherently oriented three-dimensional wire array of over 10 nm in width and up to 1 μm in length allowing us to connect it to nano-electrodes. Current-voltage characteristics of ASWs show a temperature-dependent insulator-to-metal transition, suggesting that the atomic wires could be used as thermal electrical devices.
High-resolution analytical electron microscopy of boron nitrides laser heated at high pressure
Publisher: Oxford University Press (OUP)
Date: 1997
An athermal deformation model of the yield stress anomaly in Ni3Al
Publisher: Elsevier BV
Date: 10-2007
Growth and Field-Emission Properties of Crystalline, Thin-Walled Carbon Microtubes
Publisher: Wiley
Date: 16-01-2004
Interrogating the viral dark matter of the rumen ecosystem with a global virome database
Publisher: Springer Science and Business Media LLC
Date: 29-08-2023
DOI: 10.1038/S41467-023-41075-2
Abstract: The erse rumen virome can modulate the rumen microbiome, but it remains largely unexplored. Here, we mine 975 published rumen metagenomes for viral sequences, create a global rumen virome database (RVD), and analyze the rumen virome for ersity, virus-host linkages, and potential roles in affecting rumen functions. Containing 397,180 species-level viral operational taxonomic units (vOTUs), RVD substantially increases the detection rate of rumen viruses from metagenomes compared with IMG/VR V3. Most of the classified vOTUs belong to Caudovirales , differing from those found in the human gut. The rumen virome is predicted to infect the core rumen microbiome, including fiber degraders and methanogens, carries erse auxiliary metabolic genes, and thus likely impacts the rumen ecosystem in both a top-down and a bottom-up manner. RVD and the findings provide useful resources and a baseline framework for future research to investigate how viruses may impact the rumen ecosystem and digestive physiology.
Noncovalent Functionalization of Disentangled Boron Nitride Nanotubes with Flavin Mononucleotides for Strong and Stable Visible-Light Emission in Aqueous Solution
Publisher: American Chemical Society (ACS)
Date: 28-02-2011
DOI: 10.1021/AM1010699
Abstract: Strong and stable visible-light-emitting boron nitride nanotube (BNNT)/biomolecule nanohybrids were successfully fabricated via noncovalent functionalization of BNNTs with flavin mononucleotides (FMN). Atomic force microscopy showed excellent dispersion of the nanohybrids in aqueous solution. Infrared absorption spectroscopy revealed strong π-π stacking interactions between FMN and BNNT sidewalls. Importantly, the fluorescence spectra revealed that the nanohybrids were highly fluorescent in the visible-light spectral range. Moreover, this fluorescence had unique pH-dependent and thermally stable properties. These nanohybrids might be used to construct novel fluorescence imaging probes that function over a wide pH and temperature range.
Efficient lithium-ion storage using a heterostructured porous carbon framework and its in situ transmission electron microscopy study
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CC05298E
Abstract: The unique 3D heterostructure can highly tolerate the volume expansion over repetitive charge/discharge of lithium-ion batteries, which has been demonstrated through in situ transmission electron microscopy.
Using MF-NF-RO train to produce low salt and high nutrient value recycled water for agricultural irrigation
Publisher: IWA Publishing
Date: 11-2008
DOI: 10.2166/WST.2008.534
Abstract: The project investigated and demonstrated that using a selective nanofiltration (NF) membrane and a reverse osmosis (RO) membrane in sequence can produce recycled water with useful levels of nutrient ions, and lower the sodium absorption ratio (SAR) to minimise soil salinity. The recovery of nutrient and useful ions from the wastewater makes NF-RO treated recycled water an attractive option for agricultural irrigation. It was found that the addition of polyacrylic acid (PAA) significantly increased the rejection of alent ions by SR2 NF element, and kept the sodium rejection largely unchanged. This effect enhanced the enrichment of alent ions in the NF rejects, and allowed sodium ions to pass to the RO stage. The product water included NF reject and the RO permeate. Overall, the MF-NF-RO train with a PAA aided NF pre-treatment can produce a product water fit for agriculture irrigation purpose, and reduce the scaling on the RO membrane due to calcium ions which are removed by NF, leading to the higher RO recovery. This approach achieved overall higher water production with less waste for disposal.
Preparation of 3D open ordered mesoporous carbon single-crystals and their structural evolution during ammonia activation
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC05318A
Abstract: Three-dimensional ordered mesoporous carbon single-crystals with well-interconnected open mesoporous structures are obtained via a simple and facile soft-template strategy.
Spontaneous Coating of Carbon Nanotubes with an Ultrathin Polypyrrole Layer
Publisher: Wiley
Date: 05-09-2007
Abstract: A novel protocol for precisely coating in idual multiwall carbon nanotubes (MWCNTs) with an ultrathin layer of polypyrrole was developed. The nanocoated MWCNTs were successfully prepared by in situ chemical deposition of polypyrrole in an aqueous suspension of MWCNTs. The coating layer was very uniform and the thickness of the layer was determined by controlling the monomer concentration used, which gave nanometer precision. The products were characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, electron energy loss spectroscopy, and conductivity and current-voltage measurements. The ultrathin polypyrrole layer could electrically insulate in idual MWCNTs.
Synthesis of metal–semiconductor heterojunctions inside carbon nanotubes
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B903791H
Numerical simulation of bubble induced shear inmembrane bioreactors: Effects of mixed liquor rheology and membrane configuration
Publisher: Elsevier BV
Date: 05-2015
DOI: 10.1016/J.WATRES.2015.02.009
Abstract: A CFD model, incorporating an empirically determined rheology model and a porous media model, was developed to simulate bubble induced surface shear in membrane bioreactors configured with hollow fibre membranes with outer diameters ranging from 1.3 to 2.4 mm, arranged in vertically orientated modules with packing density from 200 to 560 m(2)/m(3). The rheology model was developed for mixed liquor suspended solids (MLSS) concentrations of 3 to 16 gL(-1) in the presence and absence of coagulant (generated by addition of a ferrous salt) for shear rates ranging from 0 to 500 s(-1). Experimentally determined particle relaxation times for the biological flocs in the mixed liquor, both in the absence and presence of iron, were negligible, consistent with an environment where positive buoyancy forces were greater than negative settling forces thereby allowing the sludge mixture to be modelled as a single continuous phase. The non-Newtonian behaviour of the mixed liquor was incorporated into the CFD simulations using an Ostwald-de Waele rheology model. Interactions between mixed liquor and hollow fibre membranes of different fibre size and packing density were described using a porous media model that was calibrated by empirical measurement of inertial loss coefficients over a range of viscosities (0.8 × 10(-3) to 2.1 × 10(-3) Pa.s) and velocities (0 to 0.35 m/s) typically encountered in full scale MBRs. Experimental results indicated that addition of iron salts resulted in an increase in MLSS and sludge viscosity. Shear stress is affected by both velocity and viscosity. The increase in sludge viscosity resulted in an increase in resistance to flow through the hollow fibre membrane bundles and, as a result, decreased the liquid flow velocities. CFD simulations provided insight on the effects of point of coagulant addition and MLSS concentration on bubble-induced shear over a range of industrially relevant conditions. A 12% increase in shear stress was observed when ferrous salts were added to the membrane filtration zone compared to addition to the primary anoxic zone. The presence of iron salts also improved the distribution of shear stress especially at the lower zone of the membrane module. The CFD models developed here were validated using Particle Image Velocimetry (PIV) with the average difference between simulated liquid velocities and PIV measured velocities found to be 5.5%.
Torsional Resonators Based on Inorganic Nanotubes
Publisher: American Chemical Society (ACS)
Date: 29-12-2016
DOI: 10.1021/ACS.NANOLETT.6B03012
Abstract: We study for the first time the resonant torsional behaviors of inorganic nanotubes, specifically tungsten disulfide (WS
Synthesis and thermoelectric behaviour of copper telluride nanosheets
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA12877F
Mg2Zn11–MgO belt-like nanocables
Publisher: Elsevier BV
Date: 06-2003
Computational fluid dynamics (CFD) analysis of membrane reactors: modelling of membrane bioreactors for municipal wastewater treatment
Publisher: Elsevier
Date: 2013
Indium-assisted synthesis on GaN nanotubes
Publisher: AIP Publishing
Date: 29-04-2004
DOI: 10.1063/1.1741026
Abstract: Gallium nitride (GaN) nanotubes in a high yield were synthesized by a simple indium-assisted thermal evaporation method in the presence of NH3 gas flowing. A vapor–liquid–solid process was proposed for formation of the GaN nanotubes. The synthesized GaN nanotubes were amorphous and partially filled with indium, several micrometers in length, 40–50 nm in outer diameter, and 7 nm for the tube wall thickness. The representative photoluminescence spectrum at room temperature exhibits a great shift from the band gap of 3.40 eV (365 nm) of bulk GaN to high energy of 3.63 eV (342 nm). The synthetic route for the GaN nanotubes is simple and effective, and could provide great opportunities for both fundamental and technological applications.
Structural evolution of Ag/BN hybrids via a polyol-assisted fabrication process and their catalytic activity in CO oxidation
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CY01464K
Abstract: Enhanced catalytic activity of Ag/BN nanohybrids is ascribed to the formation of a thin intermediate Ag–O–B layer.
Boron Nitride Porous Microbelts for Hydrogen Storage
Publisher: American Chemical Society (ACS)
Date: 15-01-2013
DOI: 10.1021/NN305320V
Abstract: Layered boron nitrides (BNs) are usually viewed as excellent protective coatings and reinforcing materials due to their chemical inertness and high mechanical strength. However, the attention paid to their potential applications in gas sorption, especially in case of hydrogen, has obviously been insufficient. Herein, a novel BN material (i.e., porous microbelts), with the highest specific surface area ever reported for any BN system, up to 1488 m² g⁻¹, is obtained through one-step template-free reaction of a boron acid-melamine precursor with ammonia. Comprehensive high-resolution transmission electron microscopy, X-ray diffraction, and Raman characterizations all confirm that the obtained BN phase is partially disordered, shows an enlarged average spacing between adjacent (0002) layers (d₀₀₀₂ = 0.38 nm, compared to normal 0.33 nm for a bulk layered BN), and belongs to an intermediate state between hexagonal (h-BN) and amorphous (a-BN) phases. By changing the synthesis temperatures, the textures of obtained porous microbelts are adjustable. H₂ sorption evaluations demonstrate that the materials exhibit high and reversible H₂ uptake from 1.6 to 2.3 wt % at 77 K and at a relatively low pressure of 1 MPa.
C to BN conversion in multi-walled nanotubes as revealed by energy-filtering transmission electron microscopy
Publisher: Elsevier BV
Date: 09-2001
Halide-assisted atmospheric pressure growth of large WSe2 and WS2 monolayer crystals
Publisher: Elsevier BV
Date: 11-2015
Fabrication of ZnO Nanoplate–Nanorod Junctions
Publisher: Wiley
Date: 05-12-2005
In situ fabrication and investigation of nanostructures and nanodevices with a microscope
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CS00161K
Abstract: The widespread availability of nanostructures and nanodevices has placed strict requirements on their comprehensive characterization.
Experimental and Theoretical Studies Suggesting the Possibility of Metallic Boron Nitride Edges in Porous Nanourchins
Publisher: American Chemical Society (ACS)
Date: 12-03-2008
DOI: 10.1021/NL072713M
Abstract: We first describe the synthesis of novel and highly porous boron nitride (BN) nanospheres (100-400 nm o.d.) that exhibit a rough surface consisting of open BN nanocones and corrugated BN ribbons. The material was produced by reacting B2O3 with nanoporous carbon spheres under nitrogen at ca. 1750 degrees C. The BN nanospheres were characterized using scanning electron microscopy, high-resolution electron microscopy, and electron energy loss spectroscopy. The porous BN spheres show relatively large surface areas of ca. 290 m2/g and exhibit surprisingly stable field emission properties at low turn-on voltages (e.g., 1-1.3 V/microm). We attribute these outstanding electron emission properties to the presence of finite BN ribbons located at the surface of the nanospheres (exhibiting zigzag edges), which behave like metals as confirmed by first-principles calculations. In addition, our ab initio theoretical results indicate that the work function associated to these zigzag BN ribbons is 1.3 eV lower when compared with BN-bulk material.
Bicrystalline Zn3P2 and Cd3P2 Nanobelts and Their Electronic Transport Properties
Publisher: American Chemical Society (ACS)
Date: 05-11-2008
DOI: 10.1021/CM802516U
Paper-Derived Flexible 3D Interconnected Carbon Microfiber Networks with Controllable Pore Sizes for Supercapacitors
Publisher: American Chemical Society (ACS)
Date: 08-10-2018
Abstract: Heteroatom-doped three-dimensional (3D) carbon fiber networks have attracted immense interest because of their extensive applications in energy-storage devices. However, their practical production and usage remain a great challenge because of the costly and complex synthetic procedures. In this work, flexible B, N, and O heteroatom-doped 3D interconnected carbon microfiber networks (BNOCs) with controllable pore sizes and elemental contents were successfully synthesized via a facile one-step "chemical vapor etching and doping" method using cellulose-made paper, the most abundant and cost-effective biomass, as an original network-frame precursor. Under a rational design, the BNOCs exhibited interconnected microfiber-network structure as expressways for electron transport, spacious accessible surface area for charge accumulation, abundant mesopores and macropores for rapid inner-pore ion diffusion, and lots of functional groups for additional pseudocapacitance. Being applied as binder-free electrodes for supercapacitors, BNOC-based supercapacitors not only revealed a high specific capacitance of 357 F g
Ga-filled single-crystalline MgO nanotube: Wide-temperature range nanothermometer
Publisher: AIP Publishing
Date: 30-07-2003
DOI: 10.1063/1.1597422
Abstract: A highly effective one-step approach was developed to synthesize single-crystalline MgO nanotubes and in situ fill nanotubes with Ga. The axes of nanotubes are in the [100] direction of cubic MgO. The prepared nanotube exhibits a square-like cross section both for its interior and exterior. The liquid metal-assisted route is suggested to be a general way to prepare oxide nanotubes. Linear thermal expansion behavior recorded for liquid gallium column confined in the MgO nanotube makes possible creation of a wide-temperature range nanothermometer with superior mechanical properties and environmental structural stability.
Bicrystalline ZnS Microbelts
Publisher: American Chemical Society (ACS)
Date: 12-05-2009
DOI: 10.1021/CG9000363
Evaluation of membrane bioreactor performance via residence time distribution: Effects of membrane configuration and mixing
Publisher: IWA Publishing
Date: 02-2008
DOI: 10.2166/WST.2008.114
Abstract: Unlike conventional wastewater treatment systems that have a single effluent discharge point, membrane bioreactors (MBR) may have multiple extraction points resulting from the location of the membrane element in the reactor. This leads to multiple residence time distributions for an MBR system. One method to characterise the mixing is based on the concept of residence time distribution (RTD). A set of RTDs were generated using the conservative tracer, lithium chloride, for pilot plant MBRs with capacity up to 300 m3/day. Flat sheet and hollow fibre pilot plant MBR systems were operated in parallel on primary effluent collected at the Bedok Water Reclamation Plant in the republic of Singapore. Analysis of the RTD profiles indicated that membrane geometry did not impact on the kinetic conversion associated with nitrification because both MBRs were in well mixed conditions. However, the energy required to achieve perfect mixing with a hollow fibre module MBR, as defined by the velocity gradient, was lower than that with a flat sheet module MBR. The implication is that energy input associated with reactor mixing will depend on the configuration of the membrane. The difference in energy requirements between flat sheets and hollow fibres is such that careful consideration should be given to membrane selection in larger municipal installations.
Inorganic semiconductor nanostructures and their field-emission applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B712874F
Single-walled B-doped carbon, B/N-doped carbon and BN nanotubes synthesized from single-walled carbon nanotubes through a substitution reaction
Publisher: Elsevier BV
Date: 07-1999
First in-situ TEM Studies of Young Modulus and Elastic Properties of individual and bundled Single-Walled BN nanotubes
Publisher: Oxford University Press (OUP)
Date: 07-2012
DOI: 10.1017/S1431927612005600
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
Rectangular or square, tapered, and single-crystal PbTe nanotubes
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B822303C
Mechanics of Turbostratic Carbon Nanotubes Filled with Ga-Doped ZnS
Publisher: Trans Tech Publications, Ltd.
Date: 2010
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.636-637.665
Abstract: The mechanics of a filled carbon nanotube has been evaluated inside a transmission electron microscope employing different procedures. It is found that using a force sensor mounted on a dedicated s le holder is the most reliable method of those explored. In addition to mechanical response visualisation, properties such as elastic modulus may be directly extracted using this commercially available holder.
Cubic lattice nanosheets: Thickness-driven light emission
Publisher: American Chemical Society (ACS)
Date: 02-07-2014
DOI: 10.1021/NN502999G
Abstract: Silicon has a diamond-like cubic crystal lattice for which two-dimensional (2D) nanometer thickness nanosheet crystallization appears not to be trivial. However, in this issue of ACS Nano, the group led by Heon-Jin Choi demonstrates the gas-phase dendritic growth of Si nanosheets, only 1 to 13 nm thick. Moreover, such nanosheets display strong thickness-dependent photoluminescence in a visible range with red, green, and blue emission each documented.
Silica-Shielded Ga-ZnS Metal-Semiconductor Nanowire Heterojunctions
Publisher: Oxford University Press (OUP)
Date: 31-07-2006
DOI: 10.1017/S1431927606061629
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006
Large-scale synthesis and HRTEM analysis of single-walled B- and N-doped carbon nanotube bundles
Publisher: Elsevier BV
Date: 2000
Grafting Boron Nitride Nanotubes: From Polymers to Amorphous and Graphitic Carbon
Publisher: American Chemical Society (ACS)
Date: 13-12-2012
DOI: 10.1021/JP066052D
Atmospheric-pressure plasma seawater desalination: Clean energy, agriculture, and resource recovery nexus for a blue planet
Publisher: Elsevier BV
Date: 09-2020
BN tubular layer-sheathed CaS:Eu2+ nanowires as stable red-light-emitting nanophosphors
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B911215D
Abstract: Novel chemically stable CaS:Eu(2+) nanowires protected by BN tubular sheaths were synthesized via a one-step and catalyst-free method for the first time the nanostructures showed a red-light emission when excited by approximately 450 nm blue light.
Cathodoluminescence Mapping of Defect Regions in Cadmium Sulfide Nanowires
Publisher: Oxford University Press (OUP)
Date: 07-2017
The effect of manganese on magnetic properties and atomic and electronic structure of NiAl intermetallic compounds
Publisher: Elsevier BV
Date: 1994
Synthesis of nanocrystalline nitrogen-rich carbon nitride powders at high pressure
Publisher: Elsevier BV
Date: 12-2002
Individual Boron Nanowire Has Ultra-High Specific Young’s Modulus and Fracture Strength As Revealed by in Situ Transmission Electron Microscopy
Publisher: American Chemical Society (ACS)
Date: 11-10-2013
DOI: 10.1021/NN404316A
Abstract: Boron nanowires (BNWs) may have potential applications as reinforcing materials because B fibers are widely known for their excellent mechanical performance. However until now, there have been only few reports on the mechanical properties of in idual BNW, and in situ transmission electron microscopy (TEM) investigations shining a light on their fracture mechanism have not been performed. In this paper, we applied in situ high-resolution TEM (HRTEM) technique to study the mechanical properties of in idual BNWs using three loading schemes. The mean fracture strength and the maximum strain of in idual BNWs were measured to be 10.4 GPa and 4.1%, respectively, during the tensile tests. And the averaged Young's modulus was calculated to be 308.2 GPa under tensile and compression tests. Bending experiments for the first time performed on in idual BNWs revealed that their maximum bending strain could reach 9.9% and their ultimate bending stress arrived at 36.2 GPa. These figures are much higher than those of Si and ZnO nanowires known for their high bending strength. Moreover, the BNWs exhibited very high specific fracture strength (3.9 (GPa·cm(3))/g) and specific elastic modulus (130.6 (GPa·cm(3))/g), which are several dozens of times larger compared to many nanostructures known for their superb mechanical behaviors. At last, the effect of surface oxide layer on the Young's modulus, fracture strength and maximum bending strength of in idual BNWs was elucidated to extract their intrinsic mechanical parameters using calculated corrections. All experimental results suggest that the present BNW are a bright promise as lightweight reinforcing fillers.
Self-Assembly of SiO2 Nanowires and Si Microwires into Hierarchical Heterostructures on a Large Scale
Publisher: Wiley
Date: 18-04-2005
Erratum: “Phonon characteristics and cathodolumininescence of boron nitride nanotubes” [Appl. Phys. Lett. 86, 213110 (2005)]
Publisher: AIP Publishing
Date: 20-07-2005
DOI: 10.1063/1.2000344
Defect engineering enhances plasmonic-hot electrons exploitation for CO2 reduction over polymeric catalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3NH00348E
Hybridization of Au nanoparticle-loaded TiO2 with BN nanosheets for efficient solar-driven photocatalysis
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA13769D
Multishelled Co3O4-Fe3O4 hollow spheres with even magnetic phase distribution: Synthesis, magnetic properties and their application in water treatment
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM13180J
Boron Nitride Nanoparticles with a Petal-Like Surface as Anticancer Drug-Delivery Systems
Publisher: American Chemical Society (ACS)
Date: 31-07-2015
Abstract: Nanoparticles (NPs) have a great potential as nanosized drug-delivery carriers. Such systems must safely deliver the drug to the site of the tumor without drug leakage, effectively penetrate inside cancer cells, and provide intracellular drug release. Herein we developed an original and simple method aimed at the fabrication of spherical boron nitride NPs (BNNPs), 100-200 nm in diameter, with peculiar petal-like surfaces via chemical vapor deposition. Such structures were found to be able to absorb a large amount of antitumor drug-killing tumor cells. They revealed low cytotoxicity and rapid cellular uptake. BNNPs were saturated with doxorubicin (DOX) and then dispersed. The BNNPs loaded with DOX (BNNPs-DOX) were stable at neutral pH but effectively released DOX at pH 4.5-5.5. MTT assay and cell growth testing showed that the BNNPs-DOX nanocarriers had been toxic for IAR-6-1 cells. BNNPs loaded with DOX penetrated into the neoplastic IAR-6-1 cells using endocytic pathways, and then DOX released into the cytoplasm and cell nuclei and resulted in cell death.
Nanotubes of Magnesium Borate
Publisher: Wiley
Date: 23-04-2003
Corrigendum to “Synthesis of carbon nanotubes below room temperature”
Publisher: Elsevier BV
Date: 04-2001
One‐Dimensional Inorganic Nanostructures for Field Emitters
Publisher: Wiley
Date: 14-12-2012
Synthesis and properties of nanotubes filled with solids, liquids and gases
Publisher: IEEE
Date: 2005
In Situ TEM-STM Recorded Kinetics of Boron Nitride Nanotube Failure under Current Flow
Publisher: American Chemical Society (ACS)
Date: 04-05-2009
DOI: 10.1021/NL900379C
Abstract: Joule-heating-induced failure of in idual multiwalled boron nitride (BN) nanotubes is investigated in a high-resolution transmission electron microscope (TEM) equipped with a scanning tunneling microscope (STM) unit. Direct observation of the failure process indicates that it occurred via thermal decomposition of tubular layers from inside-out of a tube leaving amorphous ball-like boron-based nanoparticles behind. The electrical transport is well simulated by the thermionic field-emission model. The thermal decomposition temperature, which is deduced from a breakdown curve, shows a dependence on local electrical field the higher the electrical field, the lower the decomposition temperature. This is attributed to partially ionic nature of a B-N bond.
Stone−Wales Defects in Single-Walled Boron Nitride Nanotubes: Formation Energies, Electronic Structures, and Reactivity
Publisher: American Chemical Society (ACS)
Date: 11-01-2008
DOI: 10.1021/JP077115A
Needlelike Bicrystalline GaN Nanowires with Excellent Field Emission Properties
Publisher: American Chemical Society (ACS)
Date: 23-08-2005
DOI: 10.1021/JP052827R
Abstract: Large-yield and crystalline GaN nanowires have been synthesized on a Si substrate via a simple thermal evaporation process. The majority of the GaN nanowires has bicrystalline structures with a needlelike shape, a triangular prism morphology, and a uniform diameter of approximately 100 nm. Field-emission measurements show that the bicrystalline GaN nanowires with sharp tips have a lower turn-on field of approximately 7.5 V/microm and are good candidates for low-cost and large-area electron emitters. It is believed that the excellent filed emission property is attributed to the bicrystalline structure defects and sharp tips.
Line and rotational defects in boron-nitrene: Structure, energetics, and dependence on mechanical strain from first-principles calculations
Publisher: Wiley
Date: 16-03-2015
Atomic structures of iron-based single-crystalline nanowires crystallized inside multi-walled carbon nanotubes as revealed by analytical electron microscopy
Publisher: Elsevier BV
Date: 05-2006
Fabrication and characteristics of melt-spun Al ribbons reinforced with nano/micro-BN phases
Publisher: Elsevier BV
Date: 12-2013
Young modulus, mechanical and electrical properties of isolated individual and bundled single-walled boron nitride nanotubes
Publisher: IOP Publishing
Date: 17-05-2011
DOI: 10.1088/0957-4484/22/26/265704
Abstract: The Young modulus of in idual single-walled boron nitride nanotubes (SW-BNNTs) was determined using a high-resolution transmission-electron microscope (HRTEM)-atomic force microscope (AFM) set-up. The Young modulus and maximum stress for these NTs were deduced from the analysis of the stress-strain curves, and discussed as a function of the considered value for the shell thickness of an SW-BNNT. The elastic properties of bundles of SW-BNNTs were also investigated. All these experiments revealed that SW-BNNTs are very flexible. Furthermore, the electrical behavior of these SW-BNNTs was also analyzed employing a scanning tunneling microscope (STM) holder integrated with the same HRTEM. I/V curves were measured on in idual tubes as well as on bundles of SW-BNNTs.
Mixing characterisation of full-scale membrane bioreactors: CFD modelling with experimental validation
Publisher: Elsevier BV
Date: 05-2010
DOI: 10.1016/J.WATRES.2010.02.029
Abstract: Membrane Bioreactors (MBRs) have been successfully used in aerobic biological wastewater treatment to solve the perennial problem of effective solids-liquid separation. The optimisation of MBRs requires knowledge of the membrane fouling, biokinetics and mixing. However, research has mainly concentrated on the fouling and biokinetics (Ng and Kim, 2007). Current methods of design for a desired flow regime within MBRs are largely based on assumptions (e.g. complete mixing of tanks) and empirical techniques (e.g. specific mixing energy). However, it is difficult to predict how sludge rheology and vessel design in full-scale installations affects hydrodynamics, hence overall performance. Computational Fluid Dynamics (CFD) provides a method for prediction of how vessel features and mixing energy usage affect the hydrodynamics. In this study, a CFD model was developed which accounts for aeration, sludge rheology and geometry (i.e. bioreactor and membrane module). This MBR CFD model was then applied to two full-scale MBRs and was successfully validated against experimental results. The effect of sludge settling and rheology was found to have a minimal impact on the bulk mixing (i.e. the residence time distribution).
Peculiarities of Fe?Ni alloy crystallization and stability inside C nanotubes as derived through electron microscopy
Publisher: Elsevier BV
Date: 03-2005
Characteristics of Ti50Pd30Ni20 high-temperature shape memory alloy
Publisher: Elsevier BV
Date: 1995
Membrane ageing during water treatment: Mechanisms, monitoring, and control. Mechanisms, monitoring, and control.
Publisher: Elsevier
Date: 2015
Genomic insights into the phylogeny and biomass-degrading enzymes of rumen ciliates
Publisher: Cold Spring Harbor Laboratory
Date: 05-01-2022
DOI: 10.1101/2022.01.05.474053
Abstract: Understanding the bio ersity and genetics of the gut microbiome has important implications for host physiology. One underexplored and elusive group is ciliated protozoa, which play crucial roles in regulating gut microbial interactions. Integrating single-cell sequencing and an assembly-and-identification pipeline, we acquired 52 high-quality ciliate genomes of 22 rumen morphospecies for all major abundant clades. With these genomes, we firstly resolved the taxonomic and phylogenetic framework that reclassified them into 19 species spanning 13 genera and reassigned the genus Dasytricha from Isotrichidae to a new family Dasytrichidae. Via extensive horizontal gene transfer and gene family expansion, rumen ciliates possess a broad array of enzymes to synergistically degrade plant and microbial carbohydrates. In particular, ∼80% of the degrading enzymes in Diplodiniinae and Ophryoscolecinae act on plant cell wall, and the high activities of their cellulase, xylanase and lysozyme reflect the potential of ciliate enzymes for biomass-conversion. Additionally, the new ciliate dataset greatly facilitated the rumen metagenomic analyses by allowing ∼12% of reads to be classified.
New fullerenes in the B-C-N system: synthesis and analysis by an electron beam
Publisher: Oxford University Press (OUP)
Date: 1999
Nanomechanical cleavage of molybdenum disulphide atomic layers
Publisher: Springer Science and Business Media LLC
Date: 03-04-2014
DOI: 10.1038/NCOMMS4631
Abstract: The discovery of two-dimensional materials became possible due to the mechanical cleavage technique. Despite its simplicity, the as-cleaved materials demonstrated surprising macro-continuity, high crystalline quality and extraordinary mechanical and electrical properties that triggered global research interest. Here such cleavage processes and associated mechanical behaviours are investigated by a direct in situ transmission electron microscopy probing technique, using atomically thin molybdenum disulphide layers as a model material. Our technique demonstrates layer number selective cleavage, from a monolayer to double layer and up to 23 atomic layers. In situ observations combined with molecular dynamics simulations reveal unique layer-dependent bending behaviours, from spontaneous rippling (<5 atomic layers) to homogeneous curving (~ 10 layers) and finally to kinking (20 or more layers), depending on the competition of strain energy and interfacial energy.
Degradation of polymeric membranes in water and wastewater treatment
Publisher: Elsevier
Date: 2011
Search for High-Pressure Silicon Phases: Reaching the Extreme Conditions with High-Intensity Laser Irradiation
Publisher: Springer International Publishing
Date: 2023
Synthesis of InN/InP core/sheath nanowires
Publisher: AIP Publishing
Date: 25-02-2004
DOI: 10.1063/1.1651331
Abstract: Bulk quantities of InN/InP core/sheath nanowires with a diameter of 60–90 nm and a length of several micrometers were synthesized through a vapor reaction route. The nanowires consisted of single-crystalline InN core with 30–40 nm in diameter and amorphous InP sheath with a thickness of 20–25 nm. High-resolution transmission electron microscopy images indicated that most of the InN core is perfect crystalline there also exists a high density of stacking faults and twins in the crystalline InN core in some of the synthesized nanowires. Indium nanoparticles found at the tip of the nanowires indicated a vapor-liquid-solid growth mechanism for formation of the InN/InP nanostructures. This type of InN/InP nanowire is important and may be further developed to be utilized as nanoscale field effect transistor and light-emitting diode.
Boron Nitride Nanotubes and Nanosheets
Publisher: American Chemical Society (ACS)
Date: 12-05-2010
DOI: 10.1021/NN1006495
Abstract: Hexagonal boron nitride (h-BN) is a layered material with a graphite-like structure in which planar networks of BN hexagons are regularly stacked. As the structural analogue of a carbon nanotube (CNT), a BN nanotube (BNNT) was first predicted in 1994 since then, it has become one of the most intriguing non-carbon nanotubes. Compared with metallic or semiconducting CNTs, a BNNT is an electrical insulator with a band gap of ca. 5 eV, basically independent of tube geometry. In addition, BNNTs possess a high chemical stability, excellent mechanical properties, and high thermal conductivity. The same advantages are likely applicable to a graphene analogue-a monatomic layer of a hexagonal BN. Such unique properties make BN nanotubes and nanosheets a promising nanomaterial in a variety of potential fields such as optoelectronic nanodevices, functional composites, hydrogen accumulators, electrically insulating substrates perfectly matching the CNT, and graphene lattices. This review gives an introduction to the rich BN nanotube/nanosheet field, including the latest achievements in the synthesis, structural analyses, and property evaluations, and presents the purpose and significance of this direction in the light of the general nanotube/nanosheet developments.
Structure and Field‐Emission Properties of Sub‐Micrometer‐Sized Tungsten‐Whisker Arrays Fabricated by Vapor Deposition
Publisher: Wiley
Date: 10-06-2009
Nanotubes in a gradient electric field as revealed by STM TEM technique
Publisher: Springer Science and Business Media LLC
Date: 31-07-2008
Nonwetting “white graphene” films
Publisher: Elsevier BV
Date: 02-2013
Unconventional Ribbon-Shaped β-Ga2O3 Tubes with Mobile Sn Nanowire Fillings
Publisher: American Chemical Society (ACS)
Date: 22-12-2007
DOI: 10.1021/NN700285D
Abstract: We report on the synthesis of novel, unconventional beta-Ga(2)O(3) tubes via a Sn nanowire template process using thermal decomposition and oxidation of SnO and GaN powder mixtures. Distinctly different from any previously reported nano- and microtubes, the present beta-Ga(2)O(3) tubes display a flattened and thin belt-like (or ribbon-like) morphology. Each ribbon-shaped tube has a width of approximately 1-2 microm over its entire length, a length in the range of tens of micrometers, a thickness of approximately 100-150 nm, and a uniform inner diameter of 30-120 nm. The tubes were either partially or completely filled with Sn nanowires, forming Sn/Ga(2)O(3) metal-semiconductor nanowire heterostructures. A convergent electron beam generated in a transmission electron microscope is demonstrated to be an effective tool for delicate manipulation of encapsulated Sn nanowires. The Sn nanowires were gently cut apart (into two discrete fragments) and then completely separated and rejoined within Ga(2)O(3) ribbon-shaped tubes. These unconventional beta-Ga(2)O(3) tubes not only should enrich the well-established bank of nanostructured morphologies and extend the understanding of crystal growth at the nanoscale but also may have promise for the design of electron-beam-irradiation- or thermo-driven electrical switches.
Microwave method for synthesis of micro- and nanostructures with controllable composition during gyrotron discharge
Publisher: SPIE-Intl Soc Optical Eng
Date: 19-01-2016
Remarkable Charge Separation and Photocatalytic Efficiency Enhancement through Interconnection of TiO2 Nanoparticles by Hydrothermal Treatment
Publisher: Wiley
Date: 17-02-2016
Abstract: Although tremendous effort has been directed to synthesizing advanced TiO2 , it remains difficult to obtain TiO2 exhibiting a photocatalytic efficiency higher than that of P25, a benchmark photocatalyst. P25 is composed of anatase, rutile, and amorphous TiO2 particles, and photoexcited electron transfer and subsequent charge separation at the anatase-rutile particle interfaces explain its high photocatalytic efficiency. Herein, we report on a facile and rational hydrothermal treatment of P25 to selectively convert the amorphous component into crystalline TiO2 , which is deposited between the original anatase and rutile particles to increase the particle interfaces and thus enhance charge separation. This process produces a new TiO2 exhibiting a considerably enhanced photocatalytic efficiency. This method of synthesizing this TiO2 , inspired by a recently burgeoning zeolite design, promises to make TiO2 applications more feasible and effective.
Boron nitride nanotubes: functionalization and composites
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B804575E
Epitaxial heterostructures: Side-to-side Si-Zns, Si-ZnSe biaxial nanowires, and sandwichlike Zns-Si-Zns triaxial nanowires
Publisher: American Chemical Society (ACS)
Date: 22-08-2003
DOI: 10.1021/JA030235L
Abstract: Epitaxial semiconducting heterostructures: side-to-side Si-ZnS, Si-ZnSe biaxial nanowires, and sandwichlike ZnS-Si-ZnS triaxial nanowires were grown via a simple two-stage thermal evaporation of mixed SiO and ZnS or SiO and ZnSe powders under a precise temperature control. Each nanowire had a uniform diameter of 40-120 nm and length ranging from several to several tens of micrometers. Subnanowires of Si, ZnS, and ZnSe within them had a diameter of 20-50, 40-60, and 20-50 nm, respectively. The optical property (nanoscale cathodoluminescence) was also investigated from these new structures. It is proposed that the Si nanowires formed through disproportionation of SiO to Si in the first evaporation stage and then served as one-dimensional nanoscale substrates (or templates) for an epitaxial growth of ZnS or ZnSe nanowires in the following thermal evaporation of ZnS or ZnSe powders. The present results suggest that the simple method might be useful for the synthesis of many other heterostructures containing Si and II-VI or III-V semiconducting composite nanowires to meet the growing demands of nanoscale science and technology.
In situ electrical measurements and manipulation of B/N-doped C nanotubes in a high-resolution transmission electron microscope
Publisher: Oxford University Press (OUP)
Date: 28-05-2003
Abstract: B/N-doped multiwalled C nanotubes were electrically probed by means of a tungsten needle attached to a piezo-driven stage of a high-resolution transmission electron microscope holder. Two-terminal transport measurements were performed in a 'W needle-nanotube-ground' circuit. The I-V curves were recorded in situ while viewing the nanotubes in the imaging mode of the microscope. This allows us to trace nanotube array morphological changes under applied voltage (up to 50 V). Specific manipulation with nanotube assemblies was found to be possible under applied electrical field: attachment of a tiny nanotube bundle to the W needle and extraction of a given nanotube fragment from an entangled complex bunch were achieved. The electrically-probed B/N-doped C nanotubes exhibited alternating B-rich and C-rich B-C-N domains within tubular layers, as revealed by elemental mapping during energy-filtered TEM (Omega filter). At room temperature the nanostructures displayed resistivity (rho) of approximately 1.8 x 10(-5) omegam and linear I-V curves. The key role of a given contact between the probing needle and a nanotube during electrical measurements was particularly verified.
Recent progress of one-dimensional ZnO nanostructured solar cells
Publisher: Elsevier BV
Date: 2012
Synthesis and <I>In-Situ</I> TEM Transport Measurements of Individual GaN Nanowires and Nanotubes
Publisher: American Scientific Publishers
Date: 06-2010
Abstract: High-purity GaN nanowires and nanotubes of various morphologies and sizes have been synthesized through epitaxial growth on [001]-oriented sapphire substrates. The GaN nanowires grown on Ni catalyst particles possess an average diameter of approximately 100 nm and rather smooth surface whereas GaN nanotubes guided by Au particles exhibit large diameters (100-500 nm) and rough surface morphology. The microstructures and crystallography of GaN nanowires and nanotubes were analyzed using a high-resolution transmission electron microscope (HRTEM). For the first time the electrical transport in in idual GaN nanowires and nanotubes was in-situ measured inside the microscope. The electrical transport was mainly affected by the nanocrystal quality and nanostructure/contact interfaces.
One‐Dimensional CdS Nanostructures: A Promising Candidate for Optoelectronics
Publisher: Wiley
Date: 30-04-2013
Abstract: As a promising candidate for optoelectronics, one-dimensional CdS nanostructures have drawn great scientific and technical interest due to their interesting fundamental properties and possibilities of utilization in novel promising optoelectronical devices with augmented performance and functionalities. This progress report highlights a selection of important topics pertinent to optoelectronical applications of one-dimensional CdS nanostructures over the last five years. This article begins with the description of rational design and controlled synthesis of CdS nanostructure arrays, alloyed nanostructucures and kinked nanowire superstructures, and then focuses on the optoelectronical properties, and applications including cathodoluminescence, lasers, light-emitting diodes, waveguides, field emitters, logic circuits, memory devices, photodetectors, gas sensors, photovoltaics and photoelectrochemistry. Finally, the general challenges and the potential future directions of this exciting area of research are highlighted.
Heterogeneous Nanotubes: (X*CNTs, X*BNNTs)
Publisher: Wiley
Date: 31-10-2011
In situ fabrication and optoelectronic analysis of axial CdS/p-Si nanowire heterojunctions in a high-resolution transmission electron microscope
Publisher: IOP Publishing
Date: 23-03-2015
DOI: 10.1088/0957-4484/26/15/154001
Abstract: A high-precision technique was utilized to construct and characterize axial nanowire heterojunctions inside a high-resolution transmission electron microscope (HRTEM). By an in-tandem technique using an ultra-sharp tungsten probe as the nanomanipulator and an optical fiber as the optical waveguide the nanoscale CdS -Si axial nanowire junctions were fabricated, and in situ photocurrents from them were successfully measured. Compared to a single constituting nanowire, the CdS -Si axial nanowire junctions possess a photocurrent saturation effect, which protects them from damage under high voltages. Furthermore, a set of experiments reveals the clear relationship between the saturation photocurrent values and the incident light intensities. The applied technique is expected to be valuable for bottom-up nanodevice fabrications, and the regarded photocurrent saturation feature may solve the Joule heating-induced failure problem in nanowire optoelectronic devices caused by a fluctuating bias.
In Vitro Investigation of the Cellular Toxicity of Boron Nitride Nanotubes
Publisher: American Chemical Society (ACS)
Date: 22-04-2011
DOI: 10.1021/NN200139H
Abstract: Nanotubes present one of the most promising opportunities in nanotechnology with a plethora of applications in nanoelectronics, mechanical engineering, as well as in biomedical technology. Due to their structure and some physical properties, boron nitride (BN) nanotubes (BNNTs) possess several advantages over carbon nanotubes (CNTs), and they are now commercially produced and used on a large scale. The human and environmental exposure to BN nanomaterials is expected to increase in the near future, and their biological responses need to be examined. Using complementary assays, we have extensively investigated the effects of BNNTs on the viability and metabolic status of different cell types: on the one hand, the effects on cells present in the lung alveoli, and on the other hand, on human embryonic kidney (HEK) cells. Our results indicate that BNNTs are cytotoxic for all cell types studied and, in most cases, are more cytotoxic than CNTs in their pristine (p-CNT) and functionalized (f-CNT) form. However, the level of toxicity and the prominent morphological alterations in the cell populations withstanding BNNT exposure are cell-type-dependent. For instance, BNNTs induced extensive multinucleated giant cell formation in macrophages and increased levels of eosinophilia in fibroblasts. Finally, our results point the toxicity of tubular nanomaterials to be strongly correlated with the cellular accumulation enhanced for straight nanotubes.
Preparation and Field-Emission of TaSe2 Nanobelt Quasi-Arrays, and Electrical Transport of Its Individual Nanobelt
Publisher: American Scientific Publishers
Date: 11-2011
Abstract: 3R-TaSe2 nanobelt quasi-arrays were gown on a Ta foil by a facile two-step method, namely, firstly the TaSe3 nanobelt arrays were grown on a Ta foil by a surface-assisted chemical vapor transport, and then they were pyrolyzed to 3R-TaSe2 nanobelt quasi-arrays in vacuum. The nanobelts have low work function and the Ta foil has high conductivity, so the nanobelt arrays possess good electronic field emission performance with a low turn-on (3.6 V/microm) and threshold fields (4.3 V/microm) (which are defined as the macroscopic field required to produce a current density of 10 microA/cm2 and 1 mA/cm2, respectively) and a high enhancement factor (1045) at an emission distance of 200 microm. The electric transport of the in idual nanobelt reveals that it is a high-conductive semiconductor, and observed by the variable-range hopping model. It suggests that the nanobelts have potential applications in field emission and field effect transistors.
Unconventional Gallium Oxide Nanowires
Publisher: Wiley
Date: 20-07-2005
Abstract: Zigzag and helical β‐Ga 2 O 3 one‐dimensional nanostructures were produced by thermal evaporation of gallium oxide in the presence of gallium nitride. High‐resolution TEM analysis indicates that each in idual zigzag nanostructure has a periodic arrangement of three distinct blocks: two structurally perfect blocks mirrored with respect to each other on the (002) plane, and one stacking‐fault‐rich block sandwiched between them. In a zigzag nanostructure, the growth orientation of a β‐Ga 2 O 3 crystal changes alternately in three blocks. The zigzag nanostructure as a whole has the [001] axial direction. In addition to zigzag nanostructures, single‐crystalline helical nanowires were also obtained.
Erratum: 'Semiconducting B-C-N nanotubes with few layers [Chemical Physics Letters (2002) vol. 359 (220-228) S0009261402005365)
Publisher: No publisher found
Date: 2002
Temperature-dependent electrical property transition of graphene oxide paper
Publisher: IOP Publishing
Date: 19-10-2012
DOI: 10.1088/0957-4484/23/45/455705
Abstract: Reduction of graphene oxide is primarily important because different reduction methods may result in graphene with totally different properties. For systematically exploring the reduction of graphene oxide, studies of the temperature-dependent electrical properties of graphene oxide (GO) are urgently required. In this work, for the first time, broadband dielectric spectroscopy was used to carry out an in situ investigation on the transition of the electrical properties of GO paper from -40 to 150 °C. The results clearly reveal a very interesting four-stage transition of electrical properties of GO paper with increasing temperature: insulator below 10 °C (stage 1), semiconductor at between 10 and 90 °C (stage 2), insulator at between 90 and 100 °C (stage 3), and semiconductor again at above 100 °C (stage 4). Subsequently, the transition mechanism was discussed in combination with detailed dielectric properties, microstructure and thermogravimetric analyses. It is suggested that the temperature-dependent transition of electronic properties of GO is closely associated with the ion mobility, water molecules removal and the reduction of GO in the GO paper. Most importantly, the present work clearly demonstrates the reduction of GO paper starts at above 100 °C.
Nanofabrication on ZnO nanowires
Publisher: AIP Publishing
Date: 11-12-2006
DOI: 10.1063/1.2404950
Abstract: ZnO nanowires were subjected to convergent electron beam irradiation in a 300kV transmission electron microscope. The size of perforated hexagonal pores generated by irradiation can vary with the beam size. An irradiated area is denuded layer by layer via removal of Zn and O atoms. The polar ZnO surfaces have a higher resistance to irradiation than the unpolar ones. Ultrathin nanobridges, ∼1nm thick or less, were generated through deliberate removal of Zn and O atomic monolayers.
Numerical simulations of impact of membrane module design variables on aeration patterns in membrane bioreactors
Publisher: Elsevier BV
Date: 12-2016
Synthesis of Highly-Oriented Black CsPbI3 Microstructures for High-Performance Solar Cells
Publisher: American Chemical Society (ACS)
Date: 30-03-2020
MoO3-promoted synthesis of multi-walled BN nanotubes from C nanotube templates
Publisher: Elsevier BV
Date: 06-2000
Paramagnetic defects in boron nitride nanostructures
Publisher: Elsevier BV
Date: 09-2005
Insulating Tubular BN Sheathing on Semiconducting Nanowires
Publisher: American Chemical Society (ACS)
Date: 30-10-2003
DOI: 10.1021/JA0381196
Abstract: An effective method was developed for generation of insulating tubular boron nitride (BN)-sheathed nanostructures. ZnS nanowires and multilayered Si-SiO2 nanowires were successfully sheathed with insulating tubular BN-forming nanocables. Both the semiconductor nanowire cores and the BN sheaths are crystalline with well-uniform morphologies.
Electron-Beam-Induced Synthesis and Characterization of W18O49 Nanowires
Publisher: American Chemical Society (ACS)
Date: 20-03-2008
DOI: 10.1021/JP8000338
Thermal stability of CsPbBr3 perovskite as revealed by in situ transmission electron microscopy
Publisher: AIP Publishing
Date: 07-2019
DOI: 10.1063/1.5108849
Abstract: The thermal stability of all-inorganic halide perovskites is their key advantage over organic/hybrid halide perovskites. Here, in situ high-resolution transmission electron microscopy (HRTEM) was used to directly investigate crystallography dynamics of a CsPbBr3 perovskite at high temperature (up to 690 K). In high vacuum TEM conditions (∼10−5 Pa), CsPbBr3 nanocrystals possessed superb stability at temperatures below 690 K. By sealing the crystals in amorphous carbon, their melting and solidification processes were directly observed at temperatures of 840 K and 838 K, respectively. This study should be valuable for future perovskite-containing solar cells, lasers, light-emitting diodes, and photodetectors working at high temperatures.
Self-assembled three-dimensional structures of single-crystalline ZnS submicrotubes formed by coalescence of ZnS nanowires
Publisher: AIP Publishing
Date: 20-03-2006
DOI: 10.1063/1.2186980
Abstract: Self-assembled three-dimensional (3D) dandelionlike ZnS structures have been successfully synthesized by a simple thermochemical process using ZnS and Ge powders as the source material. The as-synthesized dandelionlike structures consist of radially aligned ZnS submicrotubes with well-faceted hexagonal cross sections, which are formed by the coalescence of neighboring ZnS nanowires. A two-step self-assembly process was proposed to explain the formation mechanism. The as-synthesized 3D dandelionlike ZnS structures show strong green emission centered at about 550nm as well as a weak emission at 720nm.
Electrical properties of CNx nanotubes probed in a transmission electron microscope
Publisher: Springer Science and Business Media LLC
Date: 09-11-2007
Photoinduced Charge Injection and Bandgap‐Engineering of High‐Specific‐Surface‐Area BN Nanotubes using a Zinc Phthalocyanine Monolayer
Publisher: Wiley
Date: 26-07-2007
Correction to “Enhanced Field Emission Performance of Ga-Doped In2O3(ZnO)3 Superlattice Nanobelts”
Publisher: American Chemical Society (ACS)
Date: 08-02-2013
DOI: 10.1021/JP4008703
In situ TEM measurements of nanotube and nanosheet properties
Publisher: Oxford University Press (OUP)
Date: 07-2012
DOI: 10.1017/S1431927612009567
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
In situ electrical probing and bias-mediated manipulation of dielectric nanotubes in a high-resolution transmission electron microscope
Publisher: AIP Publishing
Date: 20-03-2006
DOI: 10.1063/1.2186987
Abstract: Boron nitride nanotubes filled with magnesium oxides [MgO,MgO2] and/or hydroxide [Mg(OH)2] are electrically probed and delicately manipulated inside a 300kV JEOL-3000F high-resolution transmission analytical electron microscope equipped with a side-entry “Nanofactory Instruments” piezoholder. At a low bias the nanotubes demonstrate truly insulating behavior. At a high bias of ±30V they show reversible breakdown current of several dozens of nA. Under 300kV electron beam irradiation the nanotubes are positively charged that allows us to perform on-demand manipulation with them through tuning of polarity and/or value of a bias voltage on a gold counterelectrode from −140 to +140V, owing to the prominent electrostatic nanotube-electrode interactions.
Functionalization of boron nitride nanotubes for applications in nanobiomedicine
Publisher: Elsevier
Date: 2016
Si ∕ ZnS and Si∕ZnSe core/shell nanocrystal structures
Publisher: AIP Publishing
Date: 18-10-2004
DOI: 10.1063/1.1808472
Abstract: We report on the synthesis of the Si∕ZnS and Si∕ZnSe core/shell nanocrystal structures produced via a two-stage thermal evaporation of SiO and ZnS or SiO and ZnSe powder mixtures. These core/shell structures display spherical and elliptical polycrystalline particles. Most of the Si∕ZnS core/shell nanocrystal structures have diameters of ∼90–160nm the diameters of the cores and the thicknesses of the shells vary in a range of ∼50–100nm. The diameters of the Si∕ZnSe core/shell nanocrystal structures range from ∼150 to ∼200nm the thicknesses of the shells are rather uniform, ∼30nm, and the diameters of the cores are thus in the range of ∼120–170nm. Room-temperature photoluminescence was also investigated from as-synthesized Si/ZnS and Si/ZnSe core/shell nanocrystal structures, respectively.
Indium-Assisted Growth of Aligned Ultra-Long Silica Nanotubes
Publisher: Wiley
Date: 05-01-2004
Fabrication, characterization, cathodoluminescence, and field-emission properties of silica (SiO2) nanostructures
Publisher: Elsevier BV
Date: 11-2012
Tailoring the Optical Properties of Epitaxially Grown Biaxial ZnO/Ge, and Coaxial ZnO/Ge/ZnO and Ge/ZnO/Ge Heterostructures
Publisher: Wiley
Date: 05-01-2007
Lateral piezopotential-gated field-effect transistor of ZnO nanowires
Publisher: Elsevier BV
Date: 04-2015
Probing the effect of Mg doping on triclinic Na2Mn3O7 transition metal oxide as cathode material for sodium-ion batteries
Publisher: Elsevier BV
Date: 10-2021
Young’s Modulus and Tensile Strength of Ti3C2 MXene Nanosheets As Revealed by In Situ TEM Probing, AFM Nanomechanical Mapping, and Theoretical Calculations
Publisher: American Chemical Society (ACS)
Date: 07-07-2020
Mid-infrared Polaritonic Coupling between Boron Nitride Nanotubes and Graphene
Publisher: American Chemical Society (ACS)
Date: 03-11-2014
DOI: 10.1021/NN504093G
Abstract: Boron nitride (BN) is considered to be a promising substrate for graphene-based devices in part because its large band gap can serve to insulate graphene in layered heterostructures. At mid-infrared frequencies, graphene supports surface plasmon polaritons (SPPs), whereas hexagonal-BN (h-BN) is found to support surface phonon polaritons (SPhPs). We report on the observation of infrared polaritonic coupling between graphene SPPs and boron nitride nanotube (BNNT) SPhPs. Infrared scattering type scanning near-field optical microscopy is used to obtain spatial distribution of the two types of polaritons at the nanoscale. The observation suggests that those polaritons interact at the nanoscale in a one-dimensional/two-dimensional (1D/2D) geometry, exchanging energy in a nonplanar configuration at the nanoscale. Control of the polaritonic interaction is achieved by adjustment of the graphene Fermi level through voltage gating. Our observation suggests that boron nitride nanotubes and graphene can interact at mid-infrared frequencies and coherently exchange their energies at the nanoscale through the overlap of mutual electric near field of surface phonon polaritons and surface plasmon polaritons. Such interaction enables the design of nano-optical devices based on BNNT-graphene polaritonics in the mid-infrared range.
Donor–Acceptor Nanoensembles Based on Boron Nitride Nanotubes
Publisher: Wiley
Date: 06-04-2007
Comparative high pressure Raman study of boron nitride nanotubes and hexagonal boron nitride
Publisher: Elsevier BV
Date: 04-2006
Self-assembled ZnS nanowire arrays: synthesis,in situCu doping and field emission
Publisher: IOP Publishing
Date: 17-08-2010
DOI: 10.1088/0957-4484/21/37/375601
Abstract: Well-aligned single-crystalline ZnS nanowire arrays have been grown on highly conductive Cu substrates through controlling the morphology evolution of self-patterned ZnS nanoparticles. The ZnS nanowires have sharp tips with an average size of approximately 30 nm and a length of approximately 3 microm. Field emission measurements demonstrated that the aligned ZnS nanowires grown on Cu substrates are excellent field emitters having a turn-on field as low as 2.92 V microm(-1) and a field-enhancement factor as high as 3400. The use of highly conductive metal substrate may promote the commercial applications of ZnS-based emitters in flat panel displays and other optoelectronic devices.
Discovery Of Carbon Nanothermometer
Publisher: Oxford University Press (OUP)
Date: 19-07-2003
Comparative life cycle assessment of end-of-life options for reverse osmosis membranes
Publisher: Elsevier BV
Date: 02-2015
Hazardous events in membrane bioreactors - Part 3: Impacts on microorganism log removal efficiencies
Publisher: Elsevier BV
Date: 2016
Spark plasma sintered Al-based composites reinforced with BN nanosheets exfoliated under ball milling in ethylene glycol
Publisher: Elsevier BV
Date: 02-2019
Ecological Consequences of Sediment on High-Energy Coral Reefs
Publisher: Public Library of Science (PLoS)
Date: 04-10-2013
Thermal Conductivity of Nanostructured Boron Nitride Materials
Publisher: American Chemical Society (ACS)
Date: 05-05-2006
DOI: 10.1021/JP0607014
Abstract: We have measured the thermal conductivity of bulky pellets made of various boron nitride (BN)-based nanomaterials, including spherical nanoparticles, perfectly structured, bamboo-like nanotubes, and collapsed nanotubes. The thermal conductivity strongly depends on the morphology of the BN nanomaterials, especially on the surface structure. Spherical BN particles have the lowest thermal conductivity while the collapsed BN nanotubes possess the best thermoconductive properties. A model was proposed to explain the experimental observations based on the heat percolation passage considerations.
BN nanoparticle/Ag hybrids with enhanced catalytic activity: theory and experiments
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CY02207G
Abstract: BNNPs/Ag nanohybrids with an optimal amount of B 2 O 3 demonstrated a higher catalytic activity.
Chirality transitions and transport properties of individual few-walled carbon nanotubes as revealed by in situ TEM probing
Publisher: Elsevier BV
Date: 11-2018
DOI: 10.1016/J.ULTRAMIC.2018.07.012
Abstract: Physical properties of carbon nanotubes (CNTs) are closely related to the atomic structure, i.e. the chirality. It is highly desirable to develop a technique to modify their chirality and control the resultant transport properties. Herein, we present an in situ transmission electron microscopy (TEM) probing method to monitor the chirality transition and transport properties of in idual few-walled CNTs. The changes of tube structure including the chirality are stimulated by programmed bias pulses and associated Joule heating. The chirality change of each shell is analyzed by nanobeam electron diffraction. Supported by molecular dynamics simulations, a preferred chirality transition path is identified, consistent with the Stone-Wales defect formation and dislocation sliding mechanism. The electronic transport properties are measured along with the structural changes, via fabricating transistors using the in idual nanotubes as the suspended channels. Metal-to-semiconductor transitions are observed along with the chirality changes as confirmed by both the electron diffraction and electrical measurements. Apart from providing an alternative route to control the chirality of CNTs, the present work demonstrates the rare possibility of obtaining the dynamic structure-properties relationships at the atomic and molecular levels.
Photosensing performance of branched CdS/ZnO heterostructures as revealed by in situ TEM and photodetector tests
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR00963K
Abstract: CdS/ZnO branched heterostructures have been successfully synthesized by combining thermal vapour deposition and a hydrothermal method. Drastic optoelectronic performance enhancement of such heterostructures was revealed, compared to plain CdS nanobelts, as documented by comparative in situ optoelectronic studies on corresponding in idual nanostructures using an originally designed laser-compatible transmission electron microscopy (TEM) technique. Furthermore, flexible thin-film based photodetectors based on standard CdS nanobelts and newly prepared CdS/ZnO heterostructures were fabricated on PET substrates, and comparative photocurrent and photo-responsivity measurements thoroughly verified the in situ TEM results. The CdS/ZnO branched heterostructures were found to have better performance than standard CdS nanobelts for optoelectronic applications with respect to the photocurrent to dark current ratio and responsivity.
Melting of Metallic Electrodes and Their Flowing Through a Carbon Nanotube Channel within a Device
Publisher: Wiley
Date: 05-04-2013
Abstract: Evidence is presented of a new cause of Joule heating within a simple electronic device involving a multiwalled carbon nanotube (CNT) mounted on two metal electrodes forming an electrical circuit. This time-resolved, high-resolution in situ observation of metal electrode material melting and its flow driven by the thermomigration and electromigration forces through the CNT channel sheds an additional light on the effects affecting the real electrical performance of the CNT-based devices.
Disordered state in first-order phase transitions: Hexagonal-to-cubic and cubic-to-hexagonal transitions in boron nitride
Publisher: American Physical Society (APS)
Date: 03-1998
Nano-micro-porous skutterudites with 100% enhancement in ZT for high performance thermoelectricity
Publisher: Elsevier BV
Date: 2017
Compliance to Schmid's law in the stress anomaly regime of binary stoichiometric Ni3Al
Publisher: Elsevier BV
Date: 09-1999
Semiconducting B–C–N nanotubes with few layers
Publisher: Elsevier BV
Date: 06-2002
Electron-beam irradiation induced conductivity in ZnS nanowires as revealed by in situ transmission electron microscope
Publisher: AIP Publishing
Date: 08-2009
DOI: 10.1063/1.3173286
Abstract: Electron transport variations in in idual ZnS nanowires synthesized through a chemical vapor deposition process were in situ studied in transmission electron microscope under convergent electron-beam irradiation (EBI). It was found that the transport can dramatically be enhanced using proper irradiation conditions. The conductivity mechanism was revealed based on a detailed study of microstructure and composition evolutions under irradiation. EBI-induced Zn-rich domains’ appearance and related O doping were mainly responsible for the conductivity improvements. First-principles theoretical calculations additionally indicated that the generation of midbands within a ZnS band gap might also contribute to the improved conductivity.
Synthesis and microstructure of Cd4SiS6/Si composite nanowires
Publisher: Oxford University Press (OUP)
Date: 22-12-2005
Abstract: Cd4SiS6/Si composite nanowires are produced through co-thermal evaporation of CdS and Si powders with a small amount of tin sulfide as an additive. A vapor-liquid-solid growth mechanism is proposed for the anisotropic growth of the composite nanowires based on the presence of metallic tin particles at their tip-ends. Both side-by-side and core-shell composite nanowires are obtained. The product is characterized using X-ray powder diffraction and scanning electron microscopy. Detailed structural and chemical analyses of in idual composite nanowires are carried out using transmission electron microscopy (TEM), high-resolution TEM (HRTEM), electron diffraction (ED) and energy-dispersive X-ray spectroscopy. Planar defects, including microtwins and stacking faults, are abundant in a Si core, as revealed by HRTEM and selected-area ED. The formation of composite nanowires is discussed in the light of thermodynamic and kinetic aspects.
Ball-Milled Processed, Selective Fe/h-BN Nanocatalysts for CO2 Hydrogenation
Publisher: American Chemical Society (ACS)
Date: 04-11-2022
Effect of crystalline filling on the mechanical response of carbon nanotubes
Publisher: Elsevier BV
Date: 02-2009
Fabrication of Metal–Semiconductor Nanowire Heterojunctions
Publisher: Wiley
Date: 22-03-2005
Shaping and Edge Engineering of Few-Layered Freestanding Graphene Sheets in a Transmission Electron Microscope
Publisher: American Chemical Society (ACS)
Date: 17-12-2019
DOI: 10.1021/ACS.NANOLETT.9B04524
Abstract: Full exploitation of graphene's superior properties requires the ability to precisely control its morphology and edge structures. We present such a structure-tailoring approach via controlled atom removal from graphene edges. With the use of a graphitic-carbon-capped tungsten nanoelectrode as a noncontact "milling" tool in a transmission electron microscope, graphene edge atoms approached by the tool tip are locally evaporated, thus allowing a freestanding graphene sheet to be tailored with high precision and flexibility. A threshold for the tip voltage of 3.6 ± 0.4 V, independent of polarity, is found to be the determining factor that triggers the controlled etching process. The dominant mechanisms involve weakening of carbon-carbon bonds through the interband excitation induced by tunneling electrons, assisted with a resistive-heating effect enhanced by high electric field, as elaborated by first-principles calculations. In addition to the precise shape and size control, this tip-based method enables fabrication of graphene edges with specific chiralities, such as "armchair" or "zigzag" types. The as-obtained edges can be further "polished" to become entirely atomically smooth via edge evaporation/reconstruction induced by
Fabrication of High-Quality In2Se3 Nanowire Arrays toward High-Performance Visible-Light Photodetectors
Publisher: American Chemical Society (ACS)
Date: 10-02-2010
DOI: 10.1021/NN9012466
Abstract: The synthesis of high-quality In2Se3 nanowire arrays via thermal evaporation method and the photoconductive characteristics of In2Se3 in idual nanowires are first investigated. The electrical characterization of a single In2Se3 nanowire verifies an intrinsic n-type semiconductor behavior. These single-crystalline In2Se3 nanowires are then assembled in visible-light sensors which demonstrate a fast, reversible, and stable response. The high photosensitivity and quick photoresponse are attributed to the superior single-crystal quality and large surface-to-volume ratio resulting in fewer recombination barriers in nanostructures. These excellent performances clearly demonstrate the possibility of using In2Se3 nanowires in next-generation sensors and detectors for commercial, military, and space applications.
Covalent Functionalization: Towards Soluble Multiwalled Boron Nitride Nanotubes
Publisher: Wiley
Date: 08-12-2005
Three-dimensional strutted graphene grown by substrate-free sugar blowing for high-power-density supercapacitors
Publisher: Springer Science and Business Media LLC
Date: 16-12-2013
DOI: 10.1038/NCOMMS3905
Functional boron nitride nanotubes
Publisher: IEEE
Date: 2010
Construction of Polarized Carbon-Nickel Catalytic Surfaces for Potent, Durable, and Economic Hydrogen Evolution Reactions.
Publisher: American Chemical Society (ACS)
Date: 20-03-2018
Abstract: Electrocatalytic hydrogen evolution reaction (HER) in alkaline solution is hindered by its sluggish kinetics toward water dissociation. Nickel-based catalysts, as low-cost and effective candidates, show great potentials to replace platinum (Pt)-based materials in the alkaline media. The main challenge regarding this type of catalysts is their relatively poor durability. In this work, we conceive and construct a charge-polarized carbon layer derived from carbon quantum dots (CQDs) on Ni
Fluorination and Electrical Conductivity of BN Nanotubes
Publisher: American Chemical Society (ACS)
Date: 15-04-2005
DOI: 10.1021/JA042388U
Abstract: Fluorination of BN nanotubes has been performed using a catalytic growth method, which leads to the appearance of markedly curved fluorine-doped BN sheets and converts originally insulating BN nanotubes to semiconductors, as confirmed by the comparative electron transport four-probe measurements on doped and undoped in idual BN nanotubes.
Solvothermal Synthesis, Cathodoluminescence, and Field‐Emission Properties of Pure and N‐Doped ZnO Nanobullets
Publisher: Wiley
Date: 29-12-2008
The effect of Ti3AlC2 MAX phase synthetic history on the structure and electrochemical properties of resultant Ti3C2 MXenes
Publisher: Elsevier BV
Date: 02-2021
Single-Crystal Nanotubes of II3–V2 Semiconductors
Publisher: Wiley
Date: 14-11-2006
Ultrahigh‐Performance Solar‐Blind Photodetectors Based on Individual Single‐crystalline In2Ge2O7 Nanobelts
Publisher: Wiley
Date: 21-09-2010
Tuning of the Optical, Electronic, and Magnetic Properties of Boron Nitride Nanosheets with Oxygen Doping and Functionalization
Publisher: Wiley
Date: 19-05-2017
Abstract: Engineering of the optical, electronic, and magnetic properties of hexagonal boron nitride (h-BN) nanomaterials via oxygen doping and functionalization has been envisaged in theory. However, it is still unclear as to what extent these properties can be altered using such methodology because of the lack of significant experimental progress and systematic theoretical investigations. Therefore, here, comprehensive theoretical predictions verified by solid experimental confirmations are provided, which unambiguously answer this long-standing question. Narrowing of the optical bandgap in h-BN nanosheets (from ≈5.5 eV down to 2.1 eV) and the appearance of paramagnetism and photoluminescence (of both Stokes and anti-Stokes types) in them after oxygen doping and functionalization are discussed. These results are highly valuable for further advances in semiconducting nanoscale electronics, optoelectronics, and spintronics.
Crystallography of Novel T-Shaped ZnS Nanostructures and Their Cathodoluminescence
Publisher: American Chemical Society (ACS)
Date: 30-07-2010
DOI: 10.1021/CG100835A
Carbon-Coated Single-Crystalline Zinc Sulfide Nanowires
Publisher: American Chemical Society (ACS)
Date: 23-09-2006
DOI: 10.1021/JP064246N
Abstract: Single-crystalline ZnS nanowires coated with graphitic carbon shells were synthesized by thermal evaporation of a mixture of ZnS and SnS powders in a graphite crucible. As-synthesized ZnS/C nanostructures were characterized using X-ray diffraction, scanning electron microscope, and transmission electron microscopy equipped with an energy-dispersive X-ray spectrometer. The ZnS core nanowires were formed by a Sn-catalytic vapor-liquid-solid process and grew along the [210] directions. Photoluminescence spectrum reveals that the carbon-coated ZnS nanowires have a strong emission band centered at 586 nm and a shoulder band at 645 nm.
In Situ TEM Investigations of the Interface Behavior Between Carbon Nanotubes and Metals
Publisher: Pan Stanford Publishing
Date: 17-10-2012
DOI: 10.1201/B12528-10
Single-crystal MgS nanotubes: synthesis and properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B919643A
New insights into synthesis of nanocrystalline hexagonal BN
Publisher: Elsevier BV
Date: 08-2020
One-Dimensional Inorganic Semiconductor Nanostructures
Publisher: Pan Stanford Publishing
Date: 17-10-2012
DOI: 10.1201/B12528-3
Anodic Alumina Membrane Template and Its Derivative Membrane Nanostructures
Publisher: Pan Stanford Publishing
Date: 17-10-2012
DOI: 10.1201/B12528-5
Nanocolumnar Arrays by Pulsed Laser Deposition on Polystyrene Colloid Spheres
Publisher: Pan Stanford Publishing
Date: 17-10-2012
DOI: 10.1201/B12528-6
Progress and future prospects of high-voltage and high-safety electrolytes in advanced lithium batteries: from liquid to solid electrolytes
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA03358G
Abstract: Recent progress in designing electrolytes for high-voltage lithium-ion batteries and solid-state lithium batteries is summarized.
Field emission properties of macroscopic single-walled carbon nanotube strands
Publisher: AIP Publishing
Date: 27-05-2005
DOI: 10.1063/1.1944229
Abstract: Centimeter-long strands of well-aligned single-walled carbon nanotubes (SWNT) synthesized by a hydrogen–argon arc discharge method were employed for the investigation of their field emission properties. These macroscopically long aligned SWNT strands showed advantages of low turn on electric field, high current density, good emission stability, and easy manipulation over the disoriented SWNT s les. The field enhancement factor of the strand is basically linearly proportional to its macro aspect ratio when the microstructure of the emission tip is kept unchanged. The present SWNT strands can be valuable candidates for the applications as electron-emitting sources in various electronic devices.
Seed-Assisted Growth of One-Dimensional Nanostructures
Publisher: Pan Stanford Publishing
Date: 17-10-2012
DOI: 10.1201/B12528-2
Stabilising Cobalt Sulphide Nanocapsules with Nitrogen-Doped Carbon for High-Performance Sodium-Ion Storage
Publisher: Springer Science and Business Media LLC
Date: 12-02-2020
A New Method for Determining Propagation Rate Coefficients at High Fraction of Polymer
Publisher: CSIRO Publishing
Date: 1988
DOI: 10.1071/CH9880279
pH sensor based on boron nitride nanotubes
Publisher: IOP Publishing
Date: 16-09-2009
DOI: 10.1088/0957-4484/20/41/415501
Abstract: A submicrometer-sized pH sensor based on biotin-fluorescein-functionalized multiwalled BN nanotubes with anchored Ag nanoparticles is designed. Intrinsic pH-dependent photoluminescence and Raman signals in attached fluorescein molecules enhanced by Ag nanoparticles allow this novel nanohybrid to perform as a practical pH sensor. It is able to work in a submicrometer-sized space. For ex le, the sensor may determine the environmental pH of sub-units in living cells where a traditional optical fiber sensor fails because of spatial limitations.
Kinking effects and transport properties of coaxial BN-C nanotubes as revealed by in situ transmission electron microscopy and theoretical analysis
Publisher: AIP Publishing
Date: 10-2019
DOI: 10.1063/1.5125170
Abstract: The insights into transport behavior and the effects of bending on heterostructures constructed from boron nitride (BN) and carbon (C) nanotubes are important for their flexible device applications because the two systems have equally excellent mechanical but completely different electrical properties. In this work, coaxial BN–C nanotubes have been fabricated and their intrinsic transport properties, as well as structural and electrical response to bending deformation, are studied inside a high-resolution transmission electron microscope. Ballistic, diffusive, and hopping transports within different tube length ranges have been observed. When bending deformation was applied to the tubes, although severe kinking becomes apparent, their transport properties are not notably affected. Meanwhile, both theoretical and experimental analyses confirm that the kink positions depend on the ratio of tube diameter to its length. Possible formation of quantum dots, directly within the kink areas, was predicted through calculations of electron density redistribution between nanotube walls at bending.
Characterization and Field-Emission Properties of Vertically Aligned ZnO Nanonails and Nanopencils Fabricated by a Modified Thermal-Evaporation Process
Publisher: Wiley
Date: 03-02-2006
Fabrication of Core/Shell Ge/SiO<SUB>2</SUB> and Ge/CdS Nanospheres
Publisher: American Scientific Publishers
Date: 2009
Abstract: Core/shell nanospheres of Ge/SiO2 and Ge/CdS have been synthesized by a simple thermal evaporation method using Ge, SiO or Ge, CdS as source materials. The synthesized products were characterized in detail using scanning electron microscope, transmission electron microscope as well as energy dispersive X-ray spectrometer. This simple synthesis technique not only provides a technique to protect Ge nanocrystals from oxidation, to form core/shell composite spheres, but also opens a new route to prepare core/shell spheres of a variety of semiconducting materials, such as core/shell Ge/ZnS nanospheres, ZnS/SiO2 nanospheres, etc., by a judicious choice of source materials.
Comparative study of the stability of sulfide materials encapsulated in and expelled from multi-walled carbon nanotube capsules
Publisher: Elsevier BV
Date: 2011
Ga-Doped ZnS Nanowires as Precursors for ZnO/ZnGa2O4 Nanotubes
Publisher: Wiley
Date: 18-02-2008
Template Deformation‐Tailored ZnO Nanorod/Nanowire Arrays: Full Growth Control and Optimization of Field‐Emission
Publisher: Wiley
Date: 05-10-2009
Single-Crystal Nanotubes of II3-V2 Semiconductors.
Publisher: Wiley
Date: 10-01-2007
Morphology-Driven Nonwettability of Nanostructured BN Surfaces
Publisher: American Chemical Society (ACS)
Date: 17-04-2013
DOI: 10.1021/LA4004356
Abstract: Designing geometrical structures is an effective route to tailoring the wettability of a surface. BN-based hierarchical nano- and microstructures, in particular, vertically aligned and randomly distributed tubes and cones, were synthesized and employed as a platform for studying the influence of surface morphology on their static and dynamic interactions with water droplets. The variation of the contact angle in different hierarchical BN films is attributed to the combined effects of surface roughness and partial liquid-solid contact at the interface. Moreover, the impact response of water droplets impinging on BN arrays with different wetting properties is distinct. In the case of superhydrophobic films, the water droplet bounces off the surface several times whereas in less hydrophobic films it does not rebound and remains pinned to the surface. These results provide a facile route for the selective preparation of hierarchical BN nanostructure array films and a better understanding of their tunable water-repelling behavior, for which a number of promising applications in microelectronics and optics can be envisaged.
Melting and expansion behavior of indium in carbon nanotubes
Publisher: AIP Publishing
Date: 19-11-2002
DOI: 10.1063/1.1524293
Abstract: Indium-filled carbon nanotubes were synthesized via a simple chemical vapor deposition. The carbon nanotubes had diameters of 100–200 nm and length of ∼10 μm. The melting and expansion behavior of the indium in carbon nanotubes were investigated in an analytical transmission electron microscope. It was found that the melting and expansion behavior of indium were different from that in a macroscopic state. The melting behavior was explained using a particular equation developed for a nanoscale indium column. The analysis of the expansion behavior allows us to clarify the problems of indium filling usage in carbon nanotube-based nanothermometer.
Synthesis of chemically bonded CNT–graphene heterostructure arrays
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2RA21443A
WO3 nanowires on carbon papers: electronic transport, improved ultraviolet-light photodetectors and excellent field emitters
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM04557H
Erratum to ‘Electrical field-assisted thermal decomposition of boron nitride nanotube: Experiments and first principle calculations’ [Chem. Phys. Lett. 480 (2009) 110]
Publisher: Elsevier BV
Date: 11-2009
Performance-improved Li–O2 battery with Ru nanoparticles supported on binder-free multi-walled carbon nanotube paper as cathode
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3EE44043E
Abstract: Ru nanoparticles supported on a multi-walled carbon nanotube paper as a cathode in a Li–O 2 battery can significantly reduce the charge overpotentials, and present a large discharge–charge capacity and stable cycles.
Polyhedral Oligosilsesquioxane‐Modified Boron Nitride Nanotube Based Epoxy Nanocomposites: An Ideal Dielectric Material with High Thermal Conductivity
Publisher: Wiley
Date: 06-11-2012
Ultrathin SnSe2 Flakes Grown by Chemical Vapor Deposition for High‐Performance Photodetectors
Publisher: Wiley
Date: 06-11-2015
Abstract: High-quality ultrathin single-crystalline SnSe2 flakes are synthesized under atmospheric-pressure chemical vapor deposition for the first time. A high-performance photodetector based on the in idual SnSe2 flake demonstrates a high photoresponsivity of 1.1 × 10(3) A W(-1), a high EQE of 2.61 × 10(5)%, and superb detectivity of 1.01 × 10(10) Jones, combined with fast rise and decay times of 14.5 and 8.1 ms, respectively.
Recent Progress of In Situ Transmission Electron Microscopy for Energy Materials
Publisher: Wiley
Date: 30-09-2019
Abstract: In situ transmission electron microscopy (TEM) is one of the most powerful approaches for revealing physical and chemical process dynamics at atomic resolutions. The most recent developments for in situ TEM techniques are summarized in particular, how they enable visualization of various events, measure properties, and solve problems in the field of energy by revealing detailed mechanisms at the nanoscale. Related applications include rechargeable batteries such as Li-ion, Na-ion, Li-O
Impact of membrane ageing on reverse osmosis performance – Implications on validation protocol
Publisher: Elsevier BV
Date: 12-2016
Facile and Mild Strategy Toward Biopolymer-Coated Boron Nitride Nanotubes via a Glycine-Assisted Interfacial Process
Publisher: American Chemical Society (ACS)
Date: 11-09-2013
DOI: 10.1021/JP4073729
Nonwetting behavior of “white” graphene coatings
Publisher: IEEE
Date: 08-2012
Enriched pseudocapacitive lithium storage in electrochemically activated carbonaceous vanadium(iv , v ) oxide hydrate
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA04191B
Abstract: Vanadium( iii ) oxide (V 2 O 3 ) derived, carbon integrated hydrated vanadium oxide (V 5 O 12 ·0.4H 2 O) as an extrinsic pseudocapacitive material for excellent lithium storage in lithium ion battery anodes.
Nitrogen-doped carbon nanotube structure tailoring and time-resolved transport measurements in a transmission electron microscope
Publisher: AIP Publishing
Date: 26-11-2007
DOI: 10.1063/1.2818676
Abstract: A dynamical response of the current-voltage characteristics of ropes and in idual structures of multiwalled nitrogen-doped carbon nanotubes has been observed inside a transmission electron microscope. The drastic change of the current transport properties is thought to be due to purging of contaminating gaseous surface adsorbed species. In addition, an in situ methodology was developed to obtain in idually pure and length-tailored nanotubes. By carefully controlling the current flow across the nanotubes, residual surface-decorating and encapsulated catalyst particles were eliminated, and short sections of the nanotubes (200to500nm) were cut.
Thickness-dependent bending modulus of hexagonal boron nitride nanosheets
Publisher: IOP Publishing
Date: 23-09-2009
DOI: 10.1088/0957-4484/20/38/385707
Abstract: Bending modulus of exfoliation-made single-crystalline hexagonal boron nitride nanosheets (BNNSs) with thicknesses of 25–300 nm and sizes of 1.2–3.0 µm were measured using three-point bending tests in an atomic force microscope. BNNSs suspended on an SiO 2 trench were cl ed by a metal film via microfabrication based on electron beam lithography. Calculated by the plate theory of a doubly cl ed plate under a concentrated load, the bending modulus of BNNSs was found to increase with the decrease of sheet thickness and approach the theoretical C 33 value of a hexagonal BN single crystal in thinner sheets (thickness nm). The thickness-dependent bending modulus was suggested to be due to the layer distribution of stacking faults which were also thought to be responsible for the layer-by-layer BNNS exfoliation.
BCN Nanotubes as Highly Sensitive Torsional Electromechanical Transducers
Publisher: American Chemical Society (ACS)
Date: 02-10-2014
DOI: 10.1021/NL502161H
Abstract: Owing to their mechanically tunable electronic properties, carbon nanotubes (CNTs) have been widely studied as potential components for nanoelectromechanical systems (NEMS) however, the mechanical properties of multiwall CNTs are often limited by the weak shear interactions between the graphitic layers. Boron nitride nanotubes (BNNTs) exhibit a strong interlayer mechanical coupling, but their high electrical resistance limits their use as electromechanical transducers. Can the outstanding mechanical properties of BNNTs be combined with the electromechanical properties of CNTs in one hybrid structure? Here, we report the first experimental study of boron carbonitride nanotube (BCNNT) mechanics and electromechanics. We found that the hybrid BCNNTs are up to five times torsionally stiffer and stronger than CNTs, thereby retaining to a large extent the ultrahigh torsional stiffness of BNNTs. At the same time, we show that the electrical response of BCNNTs to torsion is 1 to 2 orders of magnitude higher than that of CNTs. These results demonstrate that BCNNTs could be especially attractive building blocks for NEMS.
Fluid Structure Interaction analysis of lateral fibre movement in submerged membrane reactors
Publisher: Elsevier BV
Date: 04-2016
Use of arterial transfer function for the derivation of aortic waveform characteristics
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 02-2004
Si nanowire semisphere-like ensembles as field emitters
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B701113J
Abstract: Silicon nanowires assembled in micro-sized semispheres were synthesized through simple thermal evaporation without using any templates and metal particle catalysts electron microscopy revealed that the nanowires within semisphere ensembles are well-aligned and evenly distributed a typical nanowire array density was of approximately 4 x 10(9) cm(-2) field-emitting characteristics of the arrays were analyzed.
Ultrathin nanoporous Fe3O4–carbon nanosheets with enhanced supercapacitor performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA01035F
Self-Assembled Hierarchical Single-Crystalline β-SiC Nanoarchitectures
Publisher: American Chemical Society (ACS)
Date: 07-12-2006
DOI: 10.1021/CG060224E
Hollow and Polygonous Microtubes of Monocrystalline Indium Germanate
Publisher: Wiley
Date: 21-12-2005
Synthesis and Property of Nanostructured ZnS
Publisher: Oxford University Press (OUP)
Date: 07-2009
DOI: 10.1017/S1431927609092721
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
Scale formation and control in high pressure membrane water treatment systems: A review
Publisher: Elsevier BV
Date: 11-2011
Related Organisations
National University Of Science And Technology MISiS
Location: Russian Federation
Related Funding Activities
Non-equilibrium Material Phases
Start Date: 2017
End Date: 2019
Funder: Australian Research Council
View Funded ActivityA Customised Triple-beam Microscope For Precise Fabricating/characterising
Start Date: 2021
End Date: 2022
Funder: Australian Research Council
View Funded ActivityXe-plasma Dual Beam For Advanced Future Materials
Start Date: 2018
End Date: 2018
Funder: Australian Research Council
View Funded ActivityFunctional Biomass Carbons For Low-cost Sodium And Potassium-ion Batteries
Start Date: 2019
End Date: 2021
Funder: Australian Research Council
View Funded ActivityDevelopment Of A Universal Super Transmission Electron Microscope
Start Date: 2019
End Date: 2020
Funder: Australian Research Council
View Funded ActivityAustralian Laureate Fellowships - Grant ID: FL160100089
Start Date: 03-2017
End Date: 12-2024
Amount: $2,600,796.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE180100090
Start Date: 2018
End Date: 06-2019
Amount: $1,136,244.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP230101904
Start Date: 2023
End Date: 12-2025
Amount: $470,000.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP170100131
Start Date: 09-2017
End Date: 09-2021
Amount: $571,500.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP180100429
Start Date: 10-2019
End Date: 12-2023
Amount: $424,554.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP210200225
Start Date: 2023
End Date: 12-2025
Amount: $396,654.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE190100081
Start Date: 04-2019
End Date: 04-2023
Amount: $2,713,348.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE210100036
Start Date: 07-2021
End Date: 12-2023
Amount: $950,000.00
Funder: Australian Research Council
View Funded Activity