ORCID Profile
0000-0002-7322-2224
Current Organisation
Deakin University - Geelong Campus at Waurn Ponds
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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)
Materials Engineering | Functional Materials | Nanotechnology | Nanomaterials | Metals and Alloy Materials | Nanotechnology | Materials Engineering Not Elsewhere Classified | Nanofabrication, Growth and Self Assembly | Materials Engineering not elsewhere classified | Condensed Matter Physics | Condensed Matter Physics—Other | Energy Generation, Conversion and Storage Engineering | Compound Semiconductors | Optics And Opto-Electronic Physics | Condensed Matter Physics—Structural Properties | Electronic and magnetic properties of condensed matter; superconductivity | Renewable Power and Energy Systems Engineering (excl. Solar Cells) | Materials engineering | Optical Physics | Hybrid Vehicles and Powertrains | Synthesis of Materials | Colloid And Surface Chemistry | Manufacturing Engineering Not Elsewhere Classified | Composite Materials | Mineralogy And Crystallography | Structural Biology (incl. Macromolecular Modelling) | Functional materials | Condensed Matter Physics not elsewhere classified | Organic Geochemistry Not Elsewhere Classified | Condensed matter characterisation technique development | Manufacturing Processes and Technologies (excl. Textiles) | Polymers and Plastics | Mechanical Engineering | Medicinal and Biomolecular Chemistry not elsewhere classified | Ceramics | Composite and Hybrid Materials | Catalysis and Mechanisms of Reactions | Civil Engineering | Electrochemistry | Structural Chemistry and Spectroscopy | Nanoscale Characterisation | Petrophysics | Construction Engineering | Interdisciplinary Engineering Not Elsewhere Classified | Membrane And Separation Technologies | Surfaces and Structural Properties of Condensed Matter | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Physical Sciences Not Elsewhere Classified
ANZSRC Socio-Economic Objective (SEO)
Energy Storage (excl. Hydrogen) | Other | Expanding Knowledge in Technology | Expanding Knowledge in Engineering | Physical sciences | Expanding Knowledge in the Chemical Sciences | Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified | Ceramics, Glass and Industrial Mineral Products not elsewhere classified | Structural Metal Products | Manufactured products not elsewhere classified | Ceramics | Manufacturing not elsewhere classified | Integrated circuits and devices | Expanding Knowledge in the Physical Sciences | Energy Conservation and Efficiency not elsewhere classified | Aluminium | Management of Greenhouse Gas Emissions from Electricity Generation | Energy Exploration not elsewhere classified | Inorganic Industrial Chemicals | Human Diagnostics | Environmentally Sustainable Manufacturing not elsewhere classified | Biological sciences | Network transmission equipment | Chemical sciences | Climate change | Physical and Chemical Conditions of Water in Marine Environments | Health not elsewhere classified | Synthetic fibres, yarns and fabrics | Ceramics | Energy Storage, Distribution and Supply not elsewhere classified | Plastic products (incl. Construction materials) | Physical and Chemical Conditions of Water not elsewhere classified | Hydrogen Production from Renewable Energy | Energy transformation not elsewhere classified | Solar-Photovoltaic Energy | Industrial Chemicals and Related Products not elsewhere classified | Communication equipment not elsewhere classified | Machinery and equipment not elsewhere classified |
Related Links
Publications
High-quality boron nitride nanoribbons: Unzipping during nanotube synthesis
Publisher: Wiley
Date: 04-03-2013
Electric contributions to magnetic force microscopy response from graphene and MoS2 nanosheets
Publisher: AIP Publishing
Date: 03-12-2014
DOI: 10.1063/1.4903040
Abstract: Magnetic force microscopy (MFM) signals have recently been detected from whole pieces of mechanically exfoliated graphene and molybdenum disulfide (MoS2) nanosheets, and magnetism of the two nanomaterials was claimed based on these observations. However, non-magnetic interactions or artefacts are commonly associated with MFM signals, which make the interpretation of MFM signals not straightforward. A systematic investigation has been done to examine possible sources of the MFM signals from graphene and MoS2 nanosheets and whether the MFM signals can be correlated with magnetism. It is found that the MFM signals have significant non-magnetic contributions due to capacitive and electrostatic interactions between the nanosheets and conductive cantilever tip, as demonstrated by electric force microscopy and scanning Kevin probe microscopy analyses. In addition, the MFM signals of graphene and MoS2 nanosheets are not responsive to reversed magnetic field of the magnetic cantilever tip. Therefore, the observed MFM response is mainly from electric artefacts and not compelling enough to correlate with magnetism of graphene and MoS2 nanosheets.
High temperature and high rate lithium-ion batteries with boron nitride nanotubes coated polypropylene separators
Publisher: Elsevier BV
Date: 05-2019
Approaching Reactive KFePO 4 Phase for Potassium Storage by Adopting an Advanced Design Strategy
Publisher: Wiley
Date: 23-01-2020
Boron nitride nanotubes reinforced aluminum composites prepared by spark plasma sintering: Microstructure, mechanical properties and deformation behavior
Publisher: Elsevier BV
Date: 07-2013
Anode Improvement in Rechargeable Lithium-Sulfur Batteries
Publisher: Wiley
Date: 19-06-2017
Abstract: Owing to their theoretical energy density of 2600 Wh kg
Molecule-Induced Conformational Change in Boron Nitride Nanosheets with Enhanced Surface Adsorption
Publisher: Wiley
Date: 29-08-2016
Abstract: Surface interaction is extremely important to both fundamental research and practical application. Physisorption can induce shape and structural distortion (i.e., conformational changes) in macromolecular and biomolecular adsorbates, but such phenomena have rarely been observed on adsorbents. Here, it is demonstrated theoretically and experimentally that atomically thin boron nitride (BN) nanosheets as an adsorbent experience conformational changes upon surface adsorption of molecules, increasing adsorption energy and efficiency. The study not only provides new perspectives on the strong adsorption capability of BN nanosheets and many other two‐dimensional (2D) nanomaterials but also opens up possibilities for many novel applications. For ex le, it is demonstrated that BN nanosheets with the same surface area as bulk hexagonal BN particles are more effective in purification and sensing.
Nanocavity-in-Multiple Nanogap Plasmonic Coupling Effects from Vertical Sandwich-Like Au@Al2O3@Au Arrays for Surface-Enhanced Raman Scattering
Publisher: American Chemical Society (ACS)
Date: 14-02-2018
Abstract: The development of ideal three-dimensional (3D) tailorable surface-enhanced Raman scattering (SERS) substrates with the properties of timesaving, large area, high throughput, single or few molecules detection, reproducibility, reusable ability, and high density of "hot spots" has been the mainstream challenge and the robust task. Here, we construct perpendicular sandwich-like Au@Al
Clusters of α-LiFeO2 nanoparticles incorporated into multi-walled carbon nanotubes: a lithium-ion battery cathode with enhanced lithium storage properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CP53605J
Abstract: We report the preparation of a novel nanocomposite architecture of α-LiFeO2-MWCNT based on clusters of α-LiFeO2 nanoparticles incorporated into multiwalled carbon nanotubes (MWCNTs). The composite represents a promising cathode material for lithium-ion batteries. The preparation of the nanocomposite is achieved by combining a molten salt precipitation process and a radio frequency oxygen plasma for the first time. We demonstrate that clusters of α-LiFeO2 nanoparticles incorporated into MWCNTs are capable of delivering a stable and high reversible capacity of 147 mA h g(-1) at 1 C after 100 cycles with the first cycle Coulombic efficiency of ~95%. The rate capability of the composite is significantly improved and its reversible capacity is measured to be 101 mA h g(-1) at a high current rate of 10 C. Both rate capability and cycling stability are not simply a result of introduction of functionalized MWCNTs but most likely originate from the unique composite structure of clusters of α-LiFeO2 nanoparticles integrated into a network of MWCNTs. The excellent electrochemical performance of this new nanocomposite opens up new opportunities in the development of high-performance electrode materials for energy storage application using the radio frequency oxygen plasma technique.
Superhydrophobic and Superoleophilic Boron Nitride Nanotube-Coated Stainless Steel Meshes for Oil and Water Separation
Publisher: Wiley
Date: 08-11-2014
Growth direction control of aligned carbon nanotubes
Publisher: Elsevier BV
Date: 12-2005
Strategies, design and synthesis of advanced nanostructured electrodes for rechargeable batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1QM00274K
Abstract: In this review, a wide range of advanced strategies are discussed and summarized for the development of high performance electrodes for rechargeable batteries.
Toward design of synergistically active carbon-based catalysts for electrocatalytic hydrogen evolution
Publisher: American Chemical Society (ACS)
Date: 05-2014
DOI: 10.1021/NN501434A
Single layer lead iodide: computational exploration of structural, electronic and optical properties, strain induced band modulation and the role of spin–orbital-coupling
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR04431F
Abstract: Graphitic like layered materials exhibit intriguing electronic structures and thus the search for new types of two-dimensional (2D) monolayer materials is of great interest for developing novel nano-devices.
Non-covalent surface modification of boron nitride nanotubes for enhanced catalysis
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CC45667F
Abstract: Boron nitride nanotubes were functionalized with microperoxidase-11 in aqueous media, showing improved catalytic performance due to a strong electron coupling between the active centre of microperoxidase-11 and boron nitride nanotubes.
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.
High-resolution x-ray absorption studies of core excitons in hexagonal boron nitride
Publisher: AIP Publishing
Date: 05-11-2012
DOI: 10.1063/1.4767135
Boron Radicals Identified as the Source of the Unexpected Catalysis by Boron Nitride Nanosheets
Publisher: American Chemical Society (ACS)
Date: 23-01-2019
Abstract: Atomically thin boron nitride (BN) nanosheets were generally considered to be chemically inert until the recent discovery of the surprising catalysis. However, the origin of this unusual catalytic activity remains unclear. We have observed the free boron radicals at the edges and defective sites of BN nanosheets and demonstrated with both experimental and theoretical approaches that the boron radicals in the nanosheets can catalyze the chromogenic reaction of 3,5,3',5'-tetramethylbenzidine and serve as a source of reactive radicals for the co-reactant electrogenerated chemiluminescence of tris(2,2'-bipyridine)ruthenium(2+). These findings suggest BN nanosheets as a type of nonmetal catalyst.
Fluorination-induced magnetism in boron nitride nanotubes from ab initio calculations
Publisher: AIP Publishing
Date: 10-03-2008
DOI: 10.1063/1.2894507
Abstract: Ab initio calculations were conducted to investigate the electronic structures and magnetic properties of fluorinated boron nitride nanotube (F-BNNT). It was found that the chemisorption of F atoms on the B atoms of BNNT can induce spontaneous magnetization, whereas no magnetism can be produced when the B and N atoms are equally fluorinated. This provides a different approach to tune the magnetic properties of BNNTs as well as a synthetic route toward metal-free magnetic materials.
A Study on High-Rate Performance of Graphite Nanostructures Produced by Ball Milling as Anode for Lithium-Ion Batteries
Publisher: MDPI AG
Date: 12-01-2023
DOI: 10.3390/MI14010191
Abstract: Graphite, with appealing features such as good stability, high electrical conductivity, and natural abundance, is still the main commercial anode material for lithium-ion batteries. The charge-discharge rate capability of graphite anodes is not significant for the development of mobile devices and electric vehicles. Therefore, the feasibility investigation of the rate capability enhancement of graphite by manipulating the structure is worthwhile and of interest. In this study, an effective ball-milling process has been set up by which graphite nanostructures with a high surface area are produced. An in-depth investigation into the effect of ball milling on graphite structure as well as electrochemical performance, particularly rate capability, is conducted. Here, we report that graphite nanoflakes with 350 m2 g−1 surface area deliver retained capacity of ~75 mAh g−1 at 10 C (1 C = 372 mA g−1). Finally, the Li+ surface-storage mechanism is recognised by associating the structural characteristics with electrochemical properties.
TiO 2 nanoparticles prepared by hydrochloric acid leaching of mechanically activated and carbothermic reduced ilmenite
Publisher: Elsevier BV
Date: 05-2012
Mechanical properties of atomically thin boron nitride and the role of interlayer interactions
Publisher: Springer Science and Business Media LLC
Date: 22-06-2017
DOI: 10.1038/NCOMMS15815
Abstract: Atomically thin boron nitride (BN) nanosheets are important two-dimensional nanomaterials with many unique properties distinct from those of graphene, but investigation into their mechanical properties remains incomplete. Here we report that high-quality single-crystalline mono- and few-layer BN nanosheets are one of the strongest electrically insulating materials. More intriguingly, few-layer BN shows mechanical behaviours quite different from those of few-layer graphene under indentation. In striking contrast to graphene, whose strength decreases by more than 30% when the number of layers increases from 1 to 8, the mechanical strength of BN nanosheets is not sensitive to increasing thickness. We attribute this difference to the distinct interlayer interactions and hence sliding tendencies in these two materials under indentation. The significantly better interlayer integrity of BN nanosheets makes them a more attractive candidate than graphene for several applications, for ex le, as mechanical reinforcements.
Boron Nitride Nanosheets for Metal Protection
Publisher: Wiley
Date: 24-07-2014
Size and Composition Effects in Sb-Carbon Nanocomposites for Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 31-10-2016
Abstract: Sodium-ion batteries are in the spotlight as viable alternatives to lithium-ion batteries in stationary storage and power grid applications. Among possible anode materials, Sb is one of the interesting candidates due to a combination of battery-type potential plateaus in the charge-discharge profiles, high capacity (theoretical capacity of 660 mAh g
Gas Protection of Two-Dimensional Nanomaterials from High-Energy Impacts
Publisher: Springer Science and Business Media LLC
Date: 19-10-2017
DOI: 10.1038/SREP35532
Abstract: Two-dimensional (2D) materials can be produced using ball milling with the help of liquid surfactants or solid exfoliation agents, as ball milling of bulk precursor materials usually produces nanosized particles because of high-energy impacts. Post-milling treatment is thus needed to purify the nanosheets. We show here that nanosheets of graphene, BN, and MoS 2 can be produced by ball milling of their bulk crystals in the presence of ammonia or a hydrocarbon ethylene gas and the obtained nanosheets remain flat and maintain their single-crystalline structure with low defects density even after a long period of time post-milling treatment is not needed. This study does not just demonstrate production of nanosheets using ball milling, but reveals surprising indestructible behaviour of 2D nanomaterials in ammonia or hydrocarbon gas under the high-energy impacts in other milling atmospheres such as air, nitrogen or argon the same milling treatment produces nanosized particles. A systematic study reveals chemisorption of ammonia and hydrocarbon gases and chemical reactions occurring at defect sites, which heal the defects by saturating the dangling bonds. Density functional theory was used to understand the mechanism of mechanochemical reactions. Ball milling in ammonia or hydrocarbon is promising for mass-production of pure nanosheets.
Mechanical Property and Structure of Covalent Functionalised Graphene/Epoxy Nanocomposites
Publisher: Springer Science and Business Media LLC
Date: 14-03-2014
DOI: 10.1038/SREP04375
A vein-like nanoporous network of Nb2O5 with a higher lithium intercalation discharge cut-off voltage
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA12149F
High thermal conductivity of high-quality monolayer boron nitride and its thermal expansion
Publisher: American Association for the Advancement of Science (AAAS)
Date: 07-06-2019
Abstract: Atomically thin boron nitride is one of the best thermal conductors among semiconductors and insulators.
Patterned growth and cathodoluminescence of conical boron nitride nanorods
Publisher: AIP Publishing
Date: 27-02-2006
DOI: 10.1063/1.2179144
Abstract: We demonstrate a simple and effective approach for growing large-scale, high-density, and well-patterned conical boron nitride nanorods. A catalyst layer of Fe(NO3)3 was patterned on a silicon substrate by using a copper grid as a mask. The nanorods were grown via annealing milled boron carbide powders at 1300°C in a flow of nitrogen gas. The as-grown nanorods exhibit uniform morphology and the catalyst pattern precisely defines the position of nanorod deposition. Cathodoluminescence (CL) spectra of the nanorods show two broad emission bands centered at 3.75 and 1.85eV. Panchromatic CL images reveal clear patterned structure.
MoO3 nanoparticles dispersed uniformly in carbon matrix: a high capacity composite anode for Li-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM10220F
In situ production of a two-dimensional molybdenum disulfide/graphene hybrid nanosheet anode for lithium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA01503B
Abstract: A solvent-free, low-cost, high-yield and scalable single-step ball milling process is developed to construct 2D MoS 2 /graphene hybrid electrodes for lithium-ion batteries.
Layer‐by‐Layer Assembly Fabrication of Porous Boron Nitride Coated Multifunctional Materials for Water Cleaning
Publisher: Wiley
Date: 13-07-2017
Boron nitride nanotubes: Pronounced resistance to oxidation
Publisher: AIP Publishing
Date: 23-03-2004
DOI: 10.1063/1.1667278
Abstract: Boron nitride (BN) nanotubes have the same nanostructure as carbon nanotubes but are found to exhibit significant resistance to oxidation at high temperatures. Our systematic study has revealed that BN nanotubes are stable at 700 °C in air and that some thin nanotubes (diameter less than 20 nm) with perfect multiwalled cylindrical structure can survive up to 900 °C. Thermogravimetric analysis reveals an onset temperature for oxidation of BN nanotubes of 800 °C compared with only 400 °C for carbon nanotubes under the same conditions. This more pronounced resistance of BN nanotubes to oxidation is inherited from the hexagonal BN and also depends on the nanocrystalline structure. This high level of resistance to oxidation allows promising BN nanotube applications at high temperatures.
End‐of‐Life Photovoltaic Recycled Silicon: A Sustainable Circular Materials Source for Electronic Industries
Publisher: Wiley
Date: 05-05-2021
Abstract: One cannot claim solar panels to be recyclable, in a circular economy sense, until scientists find a way to harvest and repurpose their most valuable components, and silicon is one of them. The photovoltaic (PV) industry uses high‐quality silicon wafers for the fabrication of solar cells. PV recycled silicon, however, is not suitable for any application without further purification, as it contains various impurities. Herein, an advanced repurpose process of chemical etching combined ball milling is developed and optimized to produce high‐quality nanosilicon recovered from end‐of‐life PV panels and subsequent nanosilicon/graphite hybrid formation for the application in lithium‐ion batteries. The crucial feature of the hybrid's structure is that the obtained PV nanosilicon with various shapes and sizes is dispersed homogeneously and wrapped by graphitic matrix under ball milling, creating a superior electrode architecture. The PV nanosilicon/graphite anode consisting of 5 wt% nanosilicon exhibits promising electrochemical performance with a charge capacity of 426 mAh g −1 after 600 cycles, a capacity retention of 70%, a rate capability of 215 mAh g −1 at 5 C, and an average coulombic efficiency of ≈99.4%. By converting PV recycled silicon to exceptionally high‐value nanosilicon, the value of the recycled material is maximized.
Enhanced electrochemical performance of ZrO2 modified LiNi0.6Co0.2Mn0.2O2 cathode material for lithium ion batteries
Publisher: Elsevier BV
Date: 12-2017
Preparation and potential application of boron nitride nanocups
Publisher: Elsevier BV
Date: 08-2012
Replacement reaction induced by ball milling of silica in nitrogen
Publisher: Elsevier BV
Date: 1920
Fluoride-assisted synthesis of mullite (Al5.65Si0.35O9.175) nanowires
Publisher: Royal Society of Chemistry (RSC)
Date: 2006
DOI: 10.1039/B603999E
Abstract: Novel silicon-deficient mullite (Al5.65Si0.35O9.175) single crystal nanowires were synthesized in large quantities on mica substrates assisted by the intermediate fluoride species. The nanowires have diameters in the range 50-100 nm and typical lengths of several microm. Aligned nanowires were observed at the substrate edge. The nanowires have strong photoluminescence (PL) emission bands at 310, 397, 452 and 468 nm.
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
Hydrogen evolution by a metal-free electrocatalyst
Publisher: Springer Science and Business Media LLC
Date: 28-04-2014
DOI: 10.1038/NCOMMS4783
Microstructural and mechanical properties of plasma sprayed boron nitride nanotubes reinforced alumina coating
Publisher: Elsevier BV
Date: 04-2021
Field emission properties from boron nitride nanotube field emitters
Publisher: IEEE
Date: 07-2015
The nucleation and growth of carbon nanotubes in a mechano-thermal process
Publisher: Elsevier BV
Date: 2004
Hexagonal boron nitride nanosheets: Preparation, heat transport property and application as thermally conductive fillers
Publisher: Elsevier BV
Date: 09-2023
Mechanochemical reactions of ilmenite with different additives
Publisher: Elsevier BV
Date: 11-1997
Phosphorus–carbon nanocomposite anodes for lithium-ion and sodium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4TA06186A
Abstract: Phosphorus–carbon nanocomposites were evaluated as anodes for both lithium-ion and sodium-ion batteries. The composites provide attractive capacities based on alloying–dealloying operating mechanism but their cyclic performance depends significantly on the operating potential window.
Sulfur-Impregnated, Sandwich-Type, Hybrid Carbon Nanosheets with Hierarchical Porous Structure for High-Performance Lithium-Sulfur Batteries
Publisher: Wiley
Date: 06-05-2014
Ball milling: a green mechanochemical approach for synthesis of nitrogen doped carbon nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR02328A
Abstract: Technological and scientific challenges coupled with environmental considerations have attracted a search for robust, green and energy-efficient synthesis and processing routes for advanced functional nanomaterials. In this article, we demonstrate a high-energy ball milling technique for large-scale synthesis of nitrogen doped carbon nanoparticles, which can be used as an electro-catalyst for oxygen reduction reactions after a structural refinement with controlled thermal annealing. The resulting carbon nanoparticles exhibited competitive catalytic activity (5.2 mA cm(-2) kinetic-limiting current density compared with 7.6 mA cm(-2) on Pt/C reference) and excellent methanol tolerance compared to a commercial Pt/C catalyst. The proposed synthesis route by ball milling and annealing is an effective process for carbon nanoparticle production and efficient nitrogen doping, providing a large-scale production method for the development of highly efficient and practical electrocatalysts.
Superb storage and energy saving separation of hydrocarbon gases in boron nitride nanosheets via a mechanochemical process
Publisher: Elsevier BV
Date: 07-2022
Synthesis of high density boron nitride nanotube film
Publisher: Trans Tech Publications, Ltd.
Date: 07-2013
DOI: 10.4028/WWW.SCIENTIFIC.NET/KEM.562-565.926
Abstract: Antiwetting BNNT films have been achieved by milling-ink method. Superhydrophobic (CA °) are demonstrated on films with stainless steel as substrate. The high density and purity are confirmed by EDX and NEXAFS. There are only a few oxygen point defects in the form of nitrogen vacancies due to ink and annealing process in air.
Formation of the Face-Centered Cubic (FCC)-NdO x Phase at Nd/Nd-Fe-B Interface: A First-Principles Modeling
Publisher: Springer Science and Business Media LLC
Date: 28-05-2014
Boron Nitride Nanosheet Dispersion at High Concentrations
Publisher: American Chemical Society (ACS)
Date: 13-09-2021
Direct observation of defects in hexagonal boron nitride by near-edge X-ray absorption fine structure and X-ray photoemission spectroscopy
Publisher: Elsevier BV
Date: 07-2010
Interfacial reactions between titanium and boron nitride nanotubes
Publisher: Elsevier BV
Date: 2017
Molecule-Level g-C3N4 Coordinated Transition Metals as a New Class of Electrocatalysts for Oxygen Electrode Reactions
Publisher: American Chemical Society (ACS)
Date: 27-02-2017
DOI: 10.1021/JACS.6B13100
Abstract: Organometallic complexes with metal-nitrogen/carbon (M-N/C) coordination are the most important alternatives to precious metal catalysts for oxygen reduction and evolution reactions (ORR and OER) in energy conversion devices. Here, we designed and developed a range of molecule-level graphitic carbon nitride (g-C
Large scale boron carbon nitride nanosheets with enhanced lithium storage capabilities
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2CC36998B
Abstract: Few-layered boron carbon nitride nanosheets are synthesized by a simple and environmentally friendly process. The BCN nanosheets have 2-6 atomic layers with high surface area and show enhanced storage performance in lithium batteries, as well as a stable capacity of ~100 mA h g(-1) at 2 A g(-1) for 5000 cycles.
Identification and topographical characterisation of microbial nanowires in Nostoc punctiforme
Publisher: Springer Science and Business Media LLC
Date: 11-01-2016
DOI: 10.1007/S10482-015-0644-7
Abstract: Extracellular pili-like structures (PLS) produced by cyanobacteria have been poorly explored. We have done detailed topographical and electrical characterisation of PLS in Nostoc punctiforme PCC 73120 using transmission electron microscopy (TEM) and conductive atomic force microscopy (CAFM). TEM analysis showed that N. punctiforme produces two separate types of PLS differing in their length and diameter. The first type of PLS are 6-7.5 nm in diameter and 0.5-2 µm in length (short/thin PLS) while the second type of PLS are ~20-40 nm in diameter and more than 10 µm long (long/thick PLS). This is the first study to report long/thick PLS in N. punctiforme. Electrical characterisation of these two different PLS by CAFM showed that both are electrically conductive and can act as microbial nanowires. This is the first report to show two distinct PLS and also identifies microbial nanowires in N. punctiforme. This study paves the way for more detailed investigation of N. punctiforme nanowires and their potential role in cell physiology and symbiosis with plants.
Large-scale synthesis of hexagonal corundum-type In2O3 by ball milling with enhanced lithium storage capabilities
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA00182B
Ultra-fast and high-energy density polysulfide-eight ion batteries
Publisher: Elsevier BV
Date: 11-2020
Porous carbon nanotube/polyvinylidene fluoride composite material: Superhydrophobicity/superoleophilicity and tunability of electrical conductivity
Publisher: Elsevier BV
Date: 10-2014
Decoration of nitrogen vacancies by oxygen atoms in boron nitride nanotubes
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0CP00984A
Abstract: Decoration of nitrogen vacancies by oxygen atoms has been studied by near-edge X-ray absorption fine structure (NEXAFS) around B K-edge in several boron nitride (BN) structures, including bamboo-like and multi-walled BN nanotubes. Breaking of B-N bonds and formation of nitrogen vacancies under low-energy ion bombardment reduces oxidation resistance of BN structures and promotes an efficient oxygen-healing mechanism, in full agreement with some recent theoretical predictions. The formation of mixed O-B-N and B-O bonds is clearly identified by well-resolved peaks in NEXAFS spectra of excited boron atoms.
A molecular network for de novo generation of the apical surface and lumen
Publisher: Springer Science and Business Media LLC
Date: 03-10-2010
DOI: 10.1038/NCB2106
First-principles cluster variation calculations of tetragonal-cubic transition in ZrO2
Publisher: Elsevier BV
Date: 11-2013
Scalable production of wrinkled and few-layered graphene sheets and their use for oil and organic solvent absorption
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CP05864J
Abstract: High-quality wrinkled and few-layered graphene sheets have been produced via a mechano-thermal exfoliation process for a simple, effective and low-cost mass production.
Disorder in ball-milled graphite revealed by Raman spectroscopy
Publisher: Elsevier BV
Date: 06-2013
Association Between Administration of IL-6 Antagonists and Mortality Among Patients Hospitalized for COVID-19
Publisher: American Medical Association (AMA)
Date: 10-08-2021
Decoration of nitrogen vacancies by oxygen atoms in boron nitride nanotubes
Publisher: IEEE
Date: 12-2010
Current Epidemiology and Outcome of Infective Endocarditis
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 10-2015
Aspergillus endocarditis in the recent years, report of cases of a multicentric national cohort and literature review
Publisher: Wiley
Date: 12-01-2022
DOI: 10.1111/MYC.13415
Abstract: (1) To describe the incidence, clinical characteristics, treatment and outcome of Aspergillus Endocarditis (AE) in a nationwide multicentric cohort (GAMES). (2) To compare the AE cases of the GAMES cohort, with the AE cases reported in the literature since 2010. (3) To identify variables related to mortality. We recruited 10 AE cases included in the GAMES cohort (January 2008‐December 2018) and 51 cases from the literature published from January 2010 to July 2019. 4528 patients with infectious endocarditis (IE) were included in the GAMES cohort, of them 10 (0.2%) were AE. After comparing our 10 cases with the 51 of the literature, no differences were found. Analysing the 61 AE cases together, 55.7% were male, median age 45 years. Their main underlying conditions were as follows: prosthetic valve surgery (34.4%) and solid organ transplant (SOT) (19.7%). Mainly affecting mitral (36.1%) and aortic valve (29.5%). Main isolated species were as follows: Aspergillus fumigatus (47.5%) and Aspergillus flavus (24.6%). Embolisms occurred in 54%. Patients were treated with antifungals (90.2%), heart surgery (85.2%) or both (78.7%). Overall, 52.5% died. A greater mortality was observed in immunosuppressed patients (59.4% vs. 24.1%, OR = 4.09, 95%CI = 1.26–13.19, p = .02), and lower mortality was associated with undergoing cardiac surgery plus azole therapy (28.1% vs. 65.5%, OR = 0.22, 95%CI = 0.07–0.72, p = .01). AE accounts for 0.2% of all IE episodes of a national multicentric cohort, mainly affecting patients with previous valvular surgery or SOT recipients. Mortality remains high especially in immunosuppressed hosts and azole‐based treatment combined with surgical resection are related to a better outcome.
Two-Dimensional Metal Oxide Nanoflower-Like Architectures: A General Growth Method and Their Applications in Energy Storage and as Model Materials for Nanofabrication
Publisher: Wiley
Date: 07-12-2016
Abstract: Nanoflower-like architectures represent a unique type of nanomaterials in which thin 2D nanosheets are self-organised into interconnected structures. Lack of restacking between nanosheets and significant internal porosity are the particular advantages of such nanoscale architectures. A general method for the preparation of nanoflowers of a range of oxides (e.g., FeTiO
Porous BN/TiO2 hybrid nanosheets as highly efficient visible-light-driven photocatalysts
Publisher: Elsevier BV
Date: 06-2017
Eu-doped boron nitride nanotubes as a nanometer-sized visible-light source
Publisher: Wiley
Date: 16-07-2007
A Self‐Healing Amalgam Interface in Metal Batteries
Publisher: Wiley
Date: 23-09-2020
Nanomaterials enhancing the solid-state storage and decomposition of ammonia
Publisher: IOP Publishing
Date: 08-03-2022
Abstract: Hydrogen is ideal for producing carbon-free and clean-green energy with which to save the world from climate change. Proton exchange membrane fuel cells use to hydrogen to produce 100% clean energy, with water the only by-product. Apart from generating electricity, hydrogen plays a crucial role in hydrogen-powered vehicles. Unfortunately, the practical uses of hydrogen energy face many technical and safety barriers. Research into hydrogen generation and storage and reversibility transportation are still in its very early stages. Ammonia (NH 3 ) has several attractive attributes, with a high gravimetric hydrogen density of 17.8 wt% and theoretical hydrogen conversion efficiency of 89.3%. Ammonia storage and transport are well-established technologies, making the decomposition of ammonia to hydrogen the safest and most carbon-free option for using hydrogen in various real-time applications. However, several key challenges must be addressed to ensure its feasibility. Current ammonia decomposition technologies require high temperatures, pressures and non-recyclable catalysts, and a sustainable decomposition mechanism is urgently needed. This review article comprehensively summarises current knowledge about and challenges facing solid-state storage of ammonia and decomposition. It provides potential strategic solutions for developing a scalable process with which to produce clean hydrogen by eliminating possible economic and technical barriers.
Controlled surface modification of boron nitride nanotubes
Publisher: IOP Publishing
Date: 20-04-2011
Growth of Single-Walled Carbon Nanotubes from Well-Defined POSS Nanoclusters Structure
Publisher: World Scientific Pub Co Pte Lt
Date: 2015
DOI: 10.1142/S1793292015500046
Abstract: High-quality single-walled carbon nanotubes (SWNTs) with narrow diameter distribution can be generated from well-defined Si 8 O 12 nanoclusters structure which form from thermal decomposition of chemically modified polyhedral oligomeric silsesquioxane (POSS). The nanosized Si x O y particles were proved to be responsible for the SWNT growth and believed to be the reason for the narrow diameter distribution of the as-grown SWNTs. This could be extended to other POSS. The SWNTs grown from the nanosized Si x O y particles were found to be semiconducting enriched SWNTs (s-SWNTs). A facile patterning technology, direct photolithography, was developed for generating SWNT pattern, which is compatible to industrial-level fabrication of SWNTs pattern for device applications. The metal-free growth together with preferential growth of s-SWNTs and patterning in large scale from the structure-defined silicon oxide nanoclusters not only represent a big step toward the control growth of SWNTs and fabrication of devices for applications particularly in nanoelectronics and biomedicine but also provide a system for further studying and understanding the growth mechanism of SWNTs from nanosized materials and the relationship between the structure of SWNT and nonmetal catalysts.
Dots versus antidots: Computational exploration of structure, magnetism, and half-metallicity in boron-nitride nanostructures
Publisher: American Chemical Society (ACS)
Date: 10-11-2009
DOI: 10.1021/JA9071942
Abstract: Triangle-shaped nanohole, nanodot, and lattice antidot structures in hexagonal boron-nitride (h-BN) monolayer sheets are characterized with density functional theory calculations utilizing the local spin density approximation. We find that such structures may exhibit very large magnetic moments and associated spin splitting. N-terminated nanodots and antidots show strong spin anisotropy around the Fermi level, that is, half-metallicity. While B-terminated nanodots are shown to lack magnetism due to edge reconstruction, B-terminated nanoholes can retain magnetic character due to the enhanced structural stability of the surrounding two-dimensional matrix. In spite of significant lattice contraction due to the presence of multiple holes, antidot super lattices are predicted to be stable, exhibiting lified magnetism as well as greatly enhanced half-metallicity. Collectively, the results indicate new opportunities for designing h-BN-based nanoscale devices with potential applications in the areas of spintronics, light emission, and photocatalysis.
Synthesis of boron nitride nanotubes, bamboos and nanowires
Publisher: Elsevier BV
Date: 05-2008
Excellent electrochemical performance of LiFe0.4Mn0.6PO4microspheres produced using a double carbon coating process
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA03994G
Abstract: A high performance LiFe 0.4 Mn 0.6 PO 4 /C microsphere cathode for lithium ion batteries was synthesized via a double carbon coating process involving traditional techniques.
Controlled growth of zinc nanowires
Publisher: Elsevier BV
Date: 2007
Porous TiO2 with a controllable bimodal pore size distribution from natural ilmenite
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CE00533A
Mechanically activated catalyst mixing for high-yield boron nitride nanotube growth
Publisher: Springer Science and Business Media LLC
Date: 24-07-2012
A lightweight multifunctional interlayer of sulfur–nitrogen dual-doped graphene for ultrafast, long-life lithium–sulfur batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA07027B
Abstract: A lightweight multifunctional SNGE interlayer was developed, which enabled the PCNT–S cathode to deliver a high reversible specific capacity and extraordinarily excellent cycling stability at ultrahigh rates.
Superhydrophobic Properties of Nonaligned Boron Nitride Nanotube Films
Publisher: American Chemical Society (ACS)
Date: 10-12-2010
DOI: 10.1021/LA903604W
Understanding Structure–Function Relationship in Hybrid Co3O4–Fe2O3/C Lithium-Ion Battery Electrodes
Publisher: American Chemical Society (ACS)
Date: 14-09-2015
Abstract: A range of high-capacity Li-ion anode materials (conversion reactions with lithium) suffer from poor cycling stability and limited high-rate performance. These issues can be addressed through hybridization of multiple nanostructured components in an electrode. Using a Co3O4-Fe2O3/C system as an ex le, we demonstrate that the cycling stability and rate performance are improved in a hybrid electrode. The hybrid Co3O4-Fe2O3/C electrode exhibits long-term cycling stability (300 cycles) at a moderate current rate with a retained capacity of approximately 700 mAh g(-1). The reversible capacity of the Co3O4-Fe2O3/C electrode is still about 400 mAh g(-1) (above the theoretical capacity of graphite) at a high current rate of ca. 3 A g(-1), whereas Co3O4-Fe2O3, Fe2O3/C, and Co3O4/C electrodes (used as controls) are unable to operate as effectively under identical testing conditions. To understand the structure-function relationship in the hybrid electrode and the reasons for the enhanced cycling stability, we employed a combination of ex situ and in situ techniques. Our results indicate that the improvements in the hybrid electrode originate from the combination of sequential electrochemical activity of the transition metal oxides with an enhanced electronic conductivity provided by percolating carbon chains.
A model for the growth of bamboo and skeletal nanotubes: catalytic capillarity
Publisher: Elsevier BV
Date: 04-2002
Synthesis of MoS/sub 2/ nanostructures from nano-size powder by thermal annealing
Publisher: Novosibirsk State Tech. Univ
Date: 2000
Direct synthesis of rutile TiO2 nanorods with improved electrochemical lithium ion storage properties
Publisher: Elsevier BV
Date: 05-2013
Synthesis of an indium oxide nanoparticle embedded graphene three-dimensional architecture for enhanced lithium-ion storage
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA04016G
Abstract: An In 2 O 3 nanoparticle embedded graphene 3D architecture exhibits high reversible capacity and high rate capability as an anode material for lithium-ion batteries.
Nano germanium incorporated thin graphite nanoplatelets: A novel germanium based lithium-ion battery anode with enhanced electrochemical performance
Publisher: Elsevier BV
Date: 09-2021
Nanoporous transition metal oxynitrides as catalysts for the oxygen reduction reaction
Publisher: Elsevier BV
Date: 07-2013
Bimetallic molybdenum tungsten oxynitride: structure and electrochemical properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA10836H
Role of age and comorbidities in mortality of patients with infective endocarditis
Publisher: Elsevier BV
Date: 06-2019
DOI: 10.1016/J.EJIM.2019.03.006
Abstract: The aim of this study was to analyse the characteristics of patients with IE in three groups of age and to assess the ability of age and the Charlson Comorbidity Index (CCI) to predict mortality. Prospective cohort study of all patients with IE included in the GAMES Spanish database between 2008 and 2015.Patients were stratified into three age groups:<65 years,65 to 80 years,and ≥ 80 years.The area under the receiver-operating characteristic (AUROC) curve was calculated to quantify the diagnostic accuracy of the CCI to predict mortality risk. A total of 3120 patients with IE (1327 < 65 years 65-80 years ≥ 80 years) were enrolled.Fever and heart failure were the most common presentations of IE, with no differences among age groups.Patients ≥80 years who underwent surgery were significantly lower compared with other age groups (14.3%,65 years 20.5%,65-79 years 31.3%,≥80 years). In-hospital mortality was lower in the <65-year group (20.3%,<65 years .1%,65-79 years .7%,≥80 years < 0.001) as well as 1-year mortality (3.2%, <65 years 5.5%, 65-80 years .6%,≥80 years p = 0.003).Independent predictors of mortality were age ≥ 80 years (hazard ratio [HR]:2.78 % confidence interval [CI]:2.32-3.34), CCI ≥ 3 (HR:1.62 95% CI:1.39-1.88),and non-performed surgery (HR:1.64 % CI:11.16-1.58).When the three age groups were compared,the AUROC curve for CCI was significantly larger for patients aged <65 years(p < 0.001) for both in-hospital and 1-year mortality. There were no differences in the clinical presentation of IE between the groups. Age ≥ 80 years, high comorbidity (measured by CCI),and non-performance of surgery were independent predictors of mortality in patients with IE.CCI could help to identify those patients with IE and surgical indication who present a lower risk of in-hospital and 1-year mortality after surgery, especially in the <65-year group.
Boron nitride nanotubes: A novel vector for targeted magnetic drug delivery
Publisher: Bentham Science Publishers Ltd.
Date: 02-2009
Superior adsorption of pharmaceutical molecules by highly porous BN nanosheets
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP06399J
Abstract: Porous boron nitride nanosheets (BNNSs) are able to adsorb pharmaceuticals from aqueous solution with very high capacities. Regeneration is simple and performance maintained providing excellent recyclability of the material.
Formation of defects in boron nitride by low energy ion bombardment
Publisher: AIP Publishing
Date: 15-10-2009
DOI: 10.1063/1.3253576
Abstract: Formation of defects in hexagonal and cubic boron nitride (h-BN and c-BN, respectively) under low-energy argon or nitrogen ion-bombardment has been studied by near-edge x-ray absorption fine structure (NEXAFS) around boron and nitrogen K-edges. Breaking of B–N bonds for both argon and nitrogen bombardment and formation of nitrogen vacancies, VN, has been identified from the B K-edge of both h-BN and c-BN, followed by the formation of molecular nitrogen, N2, at interstitial positions. The presence of N2 produces an additional peak in photoemission spectra around N 1s core level and a sharp resonance in the low-resolution NEXAFS spectra around N K-edge, showing the characteristic vibrational fine structure in high-resolution measurements. In addition, several new peaks within the energy gap of BN, identified by NEXAFS around B and N K-edges, have been assigned to boron or nitrogen interstitials, in good agreement with theoretical predictions. Ion bombardment destroys the cubic phase of c-BN and produces a phase similar to a damaged hexagonal phase.
High yield BNNTs synthesis by promotion effect of milling-assisted precursor
Publisher: Elsevier BV
Date: 10-2013
Improving thermal conductivity of polymer composites by reducing interfacial thermal resistance between boron nitride nanotubes
Publisher: Elsevier BV
Date: 09-2018
Over 1.0mm-long boron nitride nanotubes
Publisher: Elsevier BV
Date: 09-2008
Additive‐Free Nb2O5−TiO2 Hybrid Anode towards Low‐Cost and Safe Lithium‐Ion Batteries: A Green Electrode Material Produced in an Environmentally Friendly Process
Publisher: Wiley
Date: 20-11-2018
Prevalence of Colorectal Neoplasms Among Patients With Enterococcus faecalis Endocarditis in the GAMES Cohort (2008–2017)
Publisher: Elsevier BV
Date: 2021
Anomalous evaporation behavior of ZnO powder milled mechanically under high-energy conditions
Publisher: Elsevier BV
Date: 02-2008
Long-range topological correlations of real polycrystalline grains in two dimensions
Publisher: Elsevier BV
Date: 11-2014
High-efficient production of boron nitride nanosheets via an optimized ball milling process for lubrication in oil
Publisher: Springer Science and Business Media LLC
Date: 03-12-2014
DOI: 10.1038/SREP07288
An effective approach to grow boron nitride nanowires directly on stainless-steel substrates
Publisher: IOP Publishing
Date: 30-05-2006
Improved growth of aligned carbon nanotubes by mechanical activation
Publisher: Springer Science and Business Media LLC
Date: 10-2004
Abstract: Straight aligned carbon nanotubes with multiwalled cylindrical structure have been produced by pyrolysis of iron phthalocyanine (FePc) after ball milling treatment. The pre-ball milling treatment prevented the formation of curved nanotubes with bamboo or conelike structures. X-ray diffraction analysis revealed that the milled FePc has an activated and disordered structure, which contributes a lower vaporization temperature determined by thermal gravimetric analysis. The low formation temperature and an increased nanotube growth rate are favorable to the formation of cylindrical structure than bamboo tubes.
Nanoflake Arrays of Lithiophilic Metal Oxides for the Ultra-Stable Anodes of Lithium-Metal Batteries
Publisher: Wiley
Date: 27-07-2018
Boron nitride nanotube films: preparation, properties, and implications for biology applications
Publisher: Elsevier
Date: 2016
Advanced Dual‐Ion Batteries with High‐Capacity Negative Electrodes Incorporating Black Phosphorus
Publisher: Wiley
Date: 27-04-2022
Abstract: Dual‐graphite batteries (DGBs), being an all‐graphite‐electrode variation of dual‐ion batteries (DIBs), have attracted great attention in recent years as a possible low‐cost technology for stationary energy storage due to the utilization of inexpensive graphite as a positive electrode (cathode) material. However, DGBs suffer from a low specific energy limited by the capacity of both electrode materials. In this work, a composite of black phosphorus with carbon (BP‐C) is introduced as negative electrode (anode) material for DIB full‐cells for the first time. The electrochemical behavior of the graphite || BP‐C DIB cells is then discussed in the context of DGBs and DIBs using alloying anodes. Mechanistic studies confirm the staging behavior for anion storage in the graphite positive electrode and the formation of lithiated phosphorus alloys in the negative electrode. BP‐C containing full‐cells demonstrate promising electrochemical performance with specific energies of up to 319 Wh kg –1 (related to masses of both electrode active materials) or 155 Wh kg –1 (related to masses of electrode active materials and active salt), and high Coulombic efficiency. This work provides highly relevant insights for the development of advanced high‐energy and safe DIBs incorporating BP‐C and other high‐capacity alloying materials in their anodes.
Self-assembly of core-satellite gold nanoparticles for colorimetric detection of copper ions
Publisher: Elsevier BV
Date: 11-2013
DOI: 10.1016/J.ACA.2013.09.036
Abstract: Molecule-coated nanoparticles are hybrid materials which can be engineered with novel properties. The molecular coating of metal nanoparticles can provide chemical functionality, enabling assembly of the nanoparticles that are important for applications, such as biosensing devices. Herein, we report a new self-assembly of core-satellite gold nanoparticles linked by a simple amino acid l-Cysteine for biosensing of Cu(2+). The plasmonic properties of core-satellite nano-assemblies were investigated, a new red shifted absorbance peak from about 600 to 800 nm was found, with specific wavelength depending on ratios with assembly of large and small gold nanoparticles. The spectral features obtained using surface-enhanced Raman spectroscopy (SERS) provided strong evidence for the assembly of the Cu(2+) ions to the L-Cysteine molecules leading to the successful formation of the core-satellite Cu(l-Cysteine) complex on the gold surfaces. In addition, a linear relationship between the concentration of mediating Cu(2+) and absorbance of self-assembled gold nanoparticles (GNPs) at 680 nm was obtained. These results strongly address the potential strategy for applying the functionalized GNPs as novel biosensing tools in trace detections of certain metal ions.
Subnanometer Molybdenum Sulfide on Carbon Nanotubes as a Highly Active and Stable Electrocatalyst for Hydrogen Evolution Reaction
Publisher: American Chemical Society (ACS)
Date: 27-01-2016
Half metallicity in a zigzag double-walled nanotube nanodot: An ab initio prediction
Publisher: Elsevier BV
Date: 2009
Infective endocarditis in patients with cancer
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 09-2017
Template-Free Synthesis of Functional 3D BN architecture for removal of dyes from water
Publisher: Springer Science and Business Media LLC
Date: 25-03-2014
DOI: 10.1038/SREP04453
Ilmenite FeTiO3 Nanoflowers and Their Pseudocapacitance
Publisher: American Chemical Society (ACS)
Date: 15-08-2011
DOI: 10.1021/JP203345S
Nanopatterning and Electrical Tuning of MoS2 Layers with a Subnanometer Helium Ion Beam
Publisher: American Chemical Society (ACS)
Date: 15-07-2015
DOI: 10.1021/ACS.NANOLETT.5B01673
Abstract: We report subnanometer modification enabled by an ultrafine helium ion beam. By adjusting ion dose and the beam profile, structural defects were controllably introduced in a few-layer molybdenum disulfide (MoS2) s le and its stoichiometry was modified by preferential sputtering of sulfur at a few-nanometer scale. Localized tuning of the resistivity of MoS2 was demonstrated and semiconducting, metallic-like, or insulating material was obtained by irradiation with different doses of He(+). Amorphous MoSx with metallic behavior has been demonstrated for the first time. Fabrication of MoS2 nanostructures with 7 nm dimensions and pristine crystal structure was also achieved. The damage at the edges of these nanostructures was typically confined to within 1 nm. Nanoribbons with widths as small as 1 nm were reproducibly fabricated. This nanoscale modification technique is a generalized approach that can be applied to various two-dimensional (2D) materials to produce a new range of 2D metamaterials.
The evolution of hydriding and nitriding reactions during ball milling of titanium in ammonia
Publisher: Springer Science and Business Media LLC
Date: 1995
DOI: 10.1007/BF00275370
Functionalized Boron Nitride Nanosheets/Graphene Interlayer for Fast and Long-Life Lithium-Sulfur Batteries
Publisher: Wiley
Date: 25-01-2017
First principle studies of zigzag AlN nanoribbon
Publisher: Elsevier BV
Date: 02-2009
Huge Lithium Storage in 2D Bilayer Structures with Point Defects
Publisher: American Chemical Society (ACS)
Date: 21-10-2021
Hierarchical Porous Yolk–Shell Carbon Nanosphere for High‐Performance Lithium–Sulfur Batteries
Publisher: Wiley
Date: 23-12-2016
First-principles study for ordering and phase separation in the Fe-Pd system
Publisher: IOP Publishing
Date: 15-02-2002
Synthesis of single-crystal nanoparticles of indium oxide by urea glass method and their electrochemical properties
Publisher: Elsevier BV
Date: 2013
Raman signature and phonon dispersion of atomically thin boron nitride
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6NR09312D
Abstract: Raman spectroscopy has become an essential technique to characterize and investigate graphene and many other two-dimensional materials. However, there is still a lack of consensus on the Raman signature and phonon dispersion of atomically thin boron nitride (BN), which has many unique properties distinct from graphene. Such a knowledge gap greatly affects the understanding of the basic physical and chemical properties of atomically thin BN as well as the use of Raman spectroscopy to study these nanomaterials. Here, we use both experiment and simulation to reveal the intrinsic Raman signature of monolayer and few-layer BN. We find experimentally that atomically thin BN without interaction with a substrate has a G band frequency similar to that of bulk hexagonal BN (hBN), but strain induced by the substrate can cause a pronounced Raman shift. This is in excellent agreement with our first-principles density functional theory (DFT) calculations at two levels of theory, including van der Waals dispersion forces (opt-vdW) and a fraction of the exact exchange from Hartree-Fock (HF) theory through the hybrid HSE06 functional. Both calculations demonstrate that the intrinsic E
Boron nitride nanosheets for surface-enhanced Raman spectroscopy
Publisher: Elsevier BV
Date: 2022
Nano Au-decorated boron nitride nanotubes: Conductance modification and field-emission enhancement
Publisher: AIP Publishing
Date: 16-06-2008
DOI: 10.1063/1.2943653
Abstract: This letter reports the electrical and field-emission properties of Au-decorated boron nitride nanotubes (Au-BNNTs). The insulating BNNTs become metallic after Au coating as the Au coverage exceeds a critical value. The Au decoration modifies the work function of the BNNTs and, as a consequence, the field-emission current densities of Au-BNNTs are significantly enhanced. Correspondingly, the turn-on field of the Au-BNNTs is reduced to one third and the emission current density is increased by four orders in contrast to pure BNNTs. The experimental results demonstrate that such Au-BNNTs are promising electron field emitters.
Controlling Wettability of Boron Nitride Nanotube Films and Improved Cell Proliferation
Publisher: American Chemical Society (ACS)
Date: 16-08-2012
DOI: 10.1021/JP306148E
High and Stable Ionic Conductivity in 2D Nanofluidic Ion Channels between Boron Nitride Layers
Publisher: American Chemical Society (ACS)
Date: 05-2017
DOI: 10.1021/JACS.6B11100
Abstract: Achieving a high rate of ionic transport through porous membranes and ionic channels is important in numerous applications ranging from energy storage to water desalination, but it still remains a challenge. Herein we show that ions can quickly pass through interlayer spaces in hydrated boron nitride (BN) membranes. Measurements of surface-charge governed ionic currents between BN nanosheets in a variety of salt solutions (KCl, NaCl and CaCl
A novel approach for real mass transformation from V2O 5 particles to nanorods
Publisher: American Chemical Society (ACS)
Date: 28-08-2008
DOI: 10.1021/CG800257D
Field-emission characteristics of conical boron nitride nanorods
Publisher: IOP Publishing
Date: 15-12-2007
Formation of hollow MoS2/carbon microspheres for high capacity and high rate reversible alkali-ion storage
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA01664J
Abstract: Inspired by the bird nest, we develop a hydrothermal approach to prepare MoS 2 /carbon hollow microspheres with a carbon inner shell and a vertically aligned MoS 2 outer shell, which show an excellent performance for reversible alkali-metal ion (Li + , Na + and K + ) storage.
Porous Boron Carbon Nitride Nanosheets as Efficient Metal-Free Catalysts for the Oxygen Reduction Reaction in Both Alkaline and Acidic Solutions
Publisher: American Chemical Society (ACS)
Date: 10-01-2017
Programmable graphene doping via electron beam irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR03446F
Abstract: Graphene is a promising candidate to succeed silicon based devices, and the conventional strategies for fabrication and testing of graphene-based electronics often utilise an electron beam. Here, we report on a systematic study of the effect of electron beam exposure on graphene devices. We realise reversible doping of on-chip graphene using a focused electron beam. Our results demonstrate site-specific control of carrier type and concentration achievable by modulating the charge distribution in the substrate. The effect of substrate-embedded charges on carrier mobility and conductivity of graphene is studied, with a dielectric screening model proposed to explain the effective n-type and p-type doping produced at different beam energies. Multiple logic operations are thus implemented in a single graphene sheet by using site-specific e-beam irradiation. We extend the phenomenon to MoS
Valve surgery in active infective endocarditis: A simple score to predict in-hospital prognosis
Publisher: Elsevier BV
Date: 07-2014
DOI: 10.1016/J.IJCARD.2014.04.266
Abstract: Surgery for infective endocarditis (IE) is associated with high mortality. Our objectives were to describe the experience with surgical treatment for IE in Spain, and to identify predictors of in-hospital mortality. Prospective cohort of 1000 consecutive patients with IE. Data were collected in 26 Spanish hospitals. Surgery was performed in 437 patients (43.7%). Patients treated with surgery were younger and predominantly male. They presented fewer comorbid conditions and more often had negative blood cultures and heart failure. In-hospital mortality after surgery was lower than in the medical therapy group (24.3 vs 30.7%, p=0.02). In patients treated with surgery, endocarditis involved a native valve in 267 patients (61.1%), a prosthetic valve in 122 (27.9%), and a pacemaker lead with no clear further valve involvement in 48 (11.0%). The most common aetiologies were Staphylococcus (186, 42.6%), Streptococcus (97, 22.2%), and Enterococcus (49, 11.2%). The main indications for surgery were heart failure and severe valve regurgitation. A risk score for in-hospital mortality was developed using 7 prognostic variables with a similar predictive value (OR between 1.7 and 2.3): PALSUSE: prosthetic valve, age ≥ 70, large intracardiac destruction, Staphylococcus spp, urgent surgery, sex [female], EuroSCORE ≥ 10. In-hospital mortality ranged from 0% in patients with a PALSUSE score of 0 to 45.4% in patients with PALSUSE score >3. The prognosis of IE surgery is highly variable. The PALSUSE score could help to identify patients with higher in-hospital mortality.
Multi-Scale Phase Field Simulation of Disorder-Order Transition, Combined with Cluster Variation and Path Probability Methods
Publisher: Trans Tech Publications, Ltd.
Date: 10-2009
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.631-632.401
Abstract: Multi-scale simulation of ordering process from electronic, atomistic scales to microstructural scale was carried out by hybridizing Phase Field Method (PFM) and Cluster Variation Method (CVM). The hybrid model was applied to disorder-L10 ordering process in Fe-Pd system. Furthermore, computation of relaxation constants in the PFM was attempted based on Path Probability Method (PPM) which is the time evolution version of the CVM, within a linearized analysis of order-order relaxation process.
Identification and validation of clinical phenotypes with prognostic implications in patients admitted to hospital with COVID-19: a multicentre cohort study
Publisher: Elsevier BV
Date: 06-2021
Boron Nitride Nanotubes and Nanoribbons Produced by Ball Milling Method
Publisher: CRC Press
Date: 26-01-2015
DOI: 10.1201/B18073-4
Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes
Publisher: Elsevier BV
Date: 07-2009
Reactive ball milling to produce nanocrystalline ZnO
Publisher: Elsevier BV
Date: 09-2008
Analysis of sex differences in the clinical presentation, management and prognosis of infective endocarditis in Spain
Publisher: BMJ
Date: 21-07-2021
DOI: 10.1136/HEARTJNL-2021-319254
Abstract: Sex-dependent differences of infective endocarditis (IE) have been reported. Women suffer from IE less frequently than men and tend to present more severe manifestations. Our objective was to analyse the sex-based differences of IE in the clinical presentation, treatment, and prognosis. We analysed the sex differences in the clinical presentation, modality of treatment and prognosis of IE in a national-level multicentric cohort between 2008 and 2018. All data were prospectively recorded by the GAMES cohort (Spanish Collaboration on Endocarditis). A total of 3451 patients were included, of whom 1105 were women (32.0%). Women were older than men (mean age, 68.4 vs 64.5). The most frequently affected valves were the aortic valve in men (50.6%) and mitral valve in women (48.7%). Staphylococcus aureus aetiology was more frequent in women (30.1% vs 23.1% p .001). Surgery was performed in 38.3% of women and 50% of men. After propensity score (PS) matching for age and estimated surgical risk (European System for Cardiac Operative Risk Evaluation II (EuroSCORE II)), the analysis of the matched cohorts revealed that women were less likely to undergo surgery (OR 0.74 95% CI 0.59 to 0.91 p=0.05). The observed overall in-hospital mortality was 32.8% in women and 25.7% in men (OR for the mortality of female sex 1.41 95% CI 1.21 to 1.65 p .001). This statistical difference was not modified after adjusting for all possible confounders. Female sex was an independent factor related to mortality after adjusting for confounders. In addition, women were less frequently referred for surgical treatment.
Inside Back Cover: Boron Nitride Nanosheets Improve Sensitivity and Reusability of Surface-Enhanced Raman Spectroscopy (Angew. Chem. Int. Ed. 29/2016)
Publisher: Wiley
Date: 20-05-2016
Gentamicin may have no effect on mortality of staphylococcal prosthetic valve endocarditis
Publisher: Elsevier BV
Date: 07-2018
DOI: 10.1016/J.JIAC.2018.03.003
Abstract: To analyze the influence of adding gentamicin to a regimen consisting of β-lactam or vancomycin plus rif icin on survival in patients suffering from Staphylococcal prosthetic valve endocarditis (SPVE). From January 2008 to September 2016, 334 patients with definite SPVE were attended in the participating hospitals. Ninety-four patients (28.1%) received treatment based on β-lactam or vancomycin plus rif icin and were included in the study. Variables were analyzed which related to patient survival during admission, including having received treatment with gentamicin. Seventy-seven (81.9%) were treated with cloxacillin (or vancomycin) plus rif icin plus gentamicin, and 17 patients (18.1%) received the same regimen without gentamicin. The causative microorganism was Staphylococcus aureus in 40 cases (42.6%) and coagulase-negative staphylococci in 54 cases (57.4%). Overall, 40 patients (42.6%) died during hospital admission, 33 patients (42.9%) in the group receiving gentamicin and 7 patients in the group that did not (41.2%, P = 0.899). Worsening renal function was observed in 42 patients (54.5%) who received gentamicin and in 9 patients (52.9%) who did not (p = 0.904). Heart failure as a complication of endocarditis (OR: 4.58 CI 95%: 1.84-11.42) and not performing surgery when indicated (OR: 2.68 CI 95%: 1.03-6.94) increased mortality. Gentamicin administration remained unrelated to mortality (OR: 1.001 CI 95%: 0.29-3.38) in the multivariable analysis. The addition of gentamicin to a regimen containing vancomycin or cloxacillin plus rif icin in SPVE was not associated to better outcome.
Bulk Hexagonal Boron Nitride with a Quasi-Isotropic Thermal Conductivity
Publisher: Wiley
Date: 11-05-2018
Insight into reactions and interface between boron nitride nanotube and aluminum
Publisher: Springer Science and Business Media LLC
Date: 25-09-2012
DOI: 10.1557/JMR.2012.294
Multifunctional Polymer/Porous Boron Nitride Nanosheet Membranes for Superior Trapping Emulsified Oils and Organic Molecules
Publisher: Wiley
Date: 14-07-2015
Effect of warm rolling and annealing on the mechanical properties of aluminum composite reinforced with boron nitride nanotubes
Publisher: Elsevier BV
Date: 2018
Hydrangea-like multi-scale carbon hollow submicron spheres with hierarchical pores for high performance supercapacitor electrodes
Publisher: Elsevier BV
Date: 09-2015
Nanocrystalline SnS2coated onto reduced graphene oxide: demonstrating the feasibility of a non-graphitic anode with sulfide chemistry for potassium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC03998K
Abstract: An anode material incorporating a high capacity sulfide compound is reported for potassium-ion batteries.
All-solid-state high-energy planar asymmetric supercapacitors based on all-in-one monolithic film using boron nitride nanosheets as separator
Publisher: Elsevier BV
Date: 2018
Outpatient Parenteral Antibiotic Treatment for Infective Endocarditis: A Prospective Cohort Study From the GAMES Cohort
Publisher: Oxford University Press (OUP)
Date: 14-01-2019
DOI: 10.1093/CID/CIZ030
Abstract: Outpatient parenteral antibiotic treatment (OPAT) has proven efficacious for treating infective endocarditis (IE). However, the 2001 Infectious Diseases Society of America (IDSA) criteria for OPAT in IE are very restrictive. We aimed to compare the outcomes of OPAT with those of hospital-based antibiotic treatment (HBAT). Retrospective analysis of data from a multicenter, prospective cohort study of 2000 consecutive IE patients in 25 Spanish hospitals (2008–2012) was performed. A total of 429 patients (21.5%) received OPAT, and only 21.7% fulfilled IDSA criteria. Males accounted for 70.5%, median age was 68 years (interquartile range [IQR], 56–76), and 57% had native-valve IE. The most frequent causal microorganisms were viridans group streptococci (18.6%), Staphylococcus aureus (15.6%), and coagulase-negative staphylococci (14.5%). Median length of antibiotic treatment was 42 days (IQR, 32–54), and 44% of patients underwent cardiac surgery. One-year mortality was 8% (42% for HBAT P .001), 1.4% of patients relapsed, and 10.9% were readmitted during the first 3 months after discharge (no significant differences compared with HBAT). Charlson score (odds ratio [OR], 1.21 95% confidence interval [CI], 1.04–1.42 P = .01) and cardiac surgery (OR, 0.24 95% CI, .09–.63 P = .04) were associated with 1-year mortality, whereas aortic valve involvement (OR, 0.47 95% CI, .22–.98 P = .007) was the only predictor of 1-year readmission. Failing to fulfill IDSA criteria was not a risk factor for mortality or readmission. OPAT provided excellent results despite the use of broader criteria than those recommended by IDSA. OPAT criteria should therefore be expanded.
Boron nitride nanosheets as improved and reusable substrates for gold nanoparticles enabled surface enhanced Raman spectroscopy
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP00532A
Abstract: Boron nitride nanosheets covered by gold nanoparticles are controllably fabricated for highly-sensitive and reusable substrates for surface enhanced Raman spectroscopy.
Growth of V 2O 5 nanorods from ball-milled powders and their performance in cathodes and anodes of lithium-ion batteries
Publisher: Springer Science and Business Media LLC
Date: 23-02-2010
Transmission electron microscopy investigation of substitution reactions from carbon nanotube template to silicon carbide nanowires
Publisher: IOP Publishing
Date: 18-05-2007
Dispersion of boron nitride nanotubes in aqueous solution with the help of ionic surfactants
Publisher: Elsevier BV
Date: 05-2009
An Ultra-Long-Life Flexible Lithium–Sulfur Battery with Lithium Cloth Anode and Polysulfone-Functionalized Separator
Publisher: American Chemical Society (ACS)
Date: 28-12-2020
Study on the Influence of Li-Grease EP and AW Performance by Exfoliated MoS2 Nanosheet Additive
Publisher: American Scientific Publishers
Date: 07-2014
Self-assembled V2O5 interconnected microspheres produced in a fish-water electrolyte medium as a high-performance lithium-ion-battery cathode
Publisher: Springer Science and Business Media LLC
Date: 16-09-2015
Bi-Functional Water/Oxygen Electrocatalyst Based on PdO-RuO2Composites
Publisher: The Electrochemical Society
Date: 21-11-2012
DOI: 10.1149/2.019302JES
Dielectric Screening in Atomically Thin Boron Nitride Nanosheets
Publisher: American Chemical Society (ACS)
Date: 05-12-2014
DOI: 10.1021/NL503411A
Abstract: Two-dimensional (2D) hexagonal boron nitride (BN) nanosheets are excellent dielectric substrate for graphene, molybdenum disulfide, and many other 2D nanomaterial-based electronic and photonic devices. To optimize the performance of these 2D devices, it is essential to understand the dielectric screening properties of BN nanosheets as a function of the thickness. Here, electric force microscopy along with theoretical calculations based on both state-of-the-art first-principles calculations with van der Waals interactions under consideration, and nonlinear Thomas-Fermi theory models are used to investigate the dielectric screening in high-quality BN nanosheets of different thicknesses. It is found that atomically thin BN nanosheets are less effective in electric field screening, but the screening capability of BN shows a relatively weak dependence on the layer thickness.
Mechanochemistry: A force in disguise and conditional effects towards chemical reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0CC06581A
Abstract: Controlling mechanochemistry by varying milling conditions.
Cathodoluminescence of boron nitride nanotubes doped by ytterbium
Publisher: Elsevier BV
Date: 08-2010
Boron nitride nanotube films grown from boron ink painting
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0JM01414A
Quasi-isotropic thermal conductivity of polymer films enhanced by binder-free boron nitride spheres
Publisher: Elsevier BV
Date: 11-2022
Electrochemical reactivity of ilmenite FeTiO3, its nanostructures and oxide-carbon nanocomposites with lithium
Publisher: Elsevier BV
Date: 10-2013
Influence of nitriding gases on the growth of boron nitride nanotubes
Publisher: Springer Science and Business Media LLC
Date: 06-2007
Repelling Polysulfide Ions by Boron Nitride Nanosheet Coated Separators in Lithium-Sulfur Batteries
Publisher: American Chemical Society (ACS)
Date: 15-03-2019
Erratum: Titanium Dioxide Nanotube Films for Electrochemical Supercapacitors: Biocompatibility and Operation in an Electrolyte Based on a Physiological Fluid [J. Electrochem. Soc., 162, A5065 (
Publisher: The Electrochemical Society
Date: 2015
DOI: 10.1149/2.0641512JES
Nanotube growth during annealing of mechanically milled Boron
Publisher: Springer Science and Business Media LLC
Date: 2003
In situ prepared V2O5/graphene hybrid as a superior cathode material for lithium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA04871D
Abstract: Developing synthetic methods for graphene based cathode materials, with low cost and in an environmentally friendly way, is necessary for industrial production.
Efficient production of ZnO nanowires by a ball milling and annealing method
Publisher: IOP Publishing
Date: 02-04-2007
Superhydrophobic and Superoleophilic Porous Boron Nitride Nanosheet/Polyvinylidene Fluoride Composite Material for Oil-Polluted Water Cleanup
Publisher: Wiley
Date: 03-11-2014
Purification of boron nitride nanotubes
Publisher: Elsevier BV
Date: 07-2006
Tree-like SnO2 nanowires and optical properties
Publisher: Elsevier BV
Date: 03-2011
Expanding the applications of the ilmenite mineral to the preparation of nanostructures: TiO2 nanorods and their photocatalytic properties in the degradation of oxalic acid
Publisher: Wiley
Date: 23-11-2013
Abstract: The mineral ilmenite is one of the most abundant ores in the Earth's crust and it is the main source for the industrial production of bulk titanium oxide. At the same time, methods to convert ilmenite into nanostructures of TiO(2) (which are required for new advanced applications, such as solar cells, batteries, and photocatalysts) have not been explored to any significant extent. Herein, we describe a simple and effective method for the preparation of rutile TiO(2) nanorods from ball-milled ilmenite. These nanorods have small dimensions (width: 5-20 nm, length: 50-100 nm, thickness: 2-5 nm) and possess large specific surface areas (up to 97 m(2) g(-1)). Dissolution/hydrolysis recipitation is proposed as a growth mechanism. The nanorods were found to have attractive photocatalytic properties in the degradation of oxalic acid. Their photocatalytic activity is close to that of the benchmark Degussa P25 material and better than that of a commercial high-surface-area rutile powder.
Lithium-metal polysulfide batteries with free-standing MoSxCy thin-film cathodes
Publisher: Elsevier BV
Date: 11-2021
One-step template-free synthesis of 3D functionalized flower-like boron nitride nanosheets for NH3 and CO2 adsorption
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR02074D
Abstract: The adsorption mechanisms of NH 3 and CO 2 molecules on 3D FBNNSs are discussed.
A Thermoregulatory Flexible Phase Change Nonwoven for All-Season High-Efficiency Wearable Thermal Management
Publisher: Springer Science and Business Media LLC
Date: 04-01-2023
DOI: 10.1007/S40820-022-00991-6
Abstract: Phase change materials have a key role for wearable thermal management, but suffer from poor water vapor permeability, low enthalpy value and weak shape stability caused by liquid phase leakage and intrinsic rigidity of solid–liquid phase change materials. Herein, we report for the first time a versatile strategy for designed assembly of high-enthalpy flexible phase change nonwovens (GB-PCN) by wet-spinning hybrid graphene-boron nitride (GB) fiber and subsequent impregnating paraffins (e.g., eicosane, octadecane). As a result, our GB-PCN exhibited an unprecedented enthalpy value of 206.0 J g −1 , excellent thermal reliability and anti-leakage capacity, superb thermal cycling ability of 97.6% after 1000 cycles, and ultrahigh water vapor permeability (close to the cotton), outperforming the reported PCM films and fibers to date. Notably, the wearable thermal management systems based on GB-PCN for both clothing and face mask were demonstrated, which can maintain the human body at a comfortable temperature range for a significantly long time. Therefore, our results demonstrate huge potential of GB-PCN for human-wearable passive thermal management in real scenarios.
Selective Oxidation Synthesis of MnCr2O4 Spinel Nanowires from Commercial Stainless Steel Foil
Publisher: American Chemical Society (ACS)
Date: 18-10-2007
DOI: 10.1021/CG070514A
Temperature-dependent Raman spectra of bamboo-like boron nitride nanotubes
Publisher: IOP Publishing
Date: 14-01-2014
Electrochemical performance of LiFe1−xMnxPO4/C materials prepared by ball milling
Publisher: Informa UK Limited
Date: 07-2014
Electrochemical capacitance of mesoporous tungsten oxynitride in aqueous electrolytes
Publisher: Elsevier BV
Date: 12-2012
Potassium-Ion Battery Anode Materials Operating through the Alloying-Dealloying Reaction Mechanism
Publisher: Wiley
Date: 04-12-2017
Boron nitride nanotube reinforced polyurethane composites
Publisher: Elsevier BV
Date: 04-2013
Strong Oxidation Resistance of Atomically Thin Boron Nitride Nanosheets
Publisher: American Chemical Society (ACS)
Date: 10-01-2014
DOI: 10.1021/NN500059S
Boron Nitride Nanosheet-Veiled Gold Nanoparticles for Surface Enhanced Raman Scattering
Publisher: American Chemical Society (ACS)
Date: 14-06-2016
Demonstration of the advantages of using bamboo-like nanotubes for electrochemical biosensor applications compared with single walled carbon nanotubes
Publisher: Elsevier BV
Date: 12-2005
Optical properties of BN nanotubes
Publisher: IEEE
Date: 2006
Amine-Functionalized Boron Nitride Nanosheets: A New Functional Additive for Robust, Flexible Ion Gel Electrolyte with High Lithium-Ion Transference Number
Publisher: Wiley
Date: 19-02-2020
Preparation of composite electrodes with carbon nanotubes for lithium-ion batteries by low-energy ball milling
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA06740A
Abstract: A method to prepare oxide–carbon nanotube composite electrodes for lithium-ion batteries has been demonstrated. A phase with severe transport limitations, LiFeTiO 4 , has been selected as a model electrode material.
Nitriding reactions of TiAl system induced by ball milling in ammonia gas
Publisher: Elsevier BV
Date: 10-1994
Formation of metal hydrides by mechanical alloying
Publisher: Elsevier BV
Date: 02-1995
Inquisition of Microcystis aeruginosa and Synechocystis nanowires: characterization and modelling
Publisher: Springer Science and Business Media LLC
Date: 30-08-2015
DOI: 10.1007/S10482-015-0576-2
Abstract: Identification of extracellular conductive pilus-like structures (PLS) i.e. microbial nanowires has spurred great interest among scientists due to their potential applications in the fields of biogeochemistry, bioelectronics, bioremediation etc. Using conductive atomic force microscopy, we identified microbial nanowires in Microcystis aeruginosa PCC 7806 which is an aerobic, photosynthetic microorganism. We also confirmed the earlier finding that Synechocystis sp. PCC 6803 produces microbial nanowires. In contrast to the use of highly instrumented continuous flow reactors for Synechocystis reported earlier, we identified simple and optimum culture conditions which allow increased production of nanowires in both test cyanobacteria. Production of these nanowires in Synechocystis and Microcystis were found to be sensitive to the availability of carbon source and light intensity. These structures seem to be proteinaceous in nature and their diameter was found to be 4.5-7 and 8.5-11 nm in Synechocystis and M. aeruginosa, respectively. Characterization of Synechocystis nanowires by transmission electron microscopy and biochemical techniques confirmed that they are type IV pili (TFP) while nanowires in M. aeruginosa were found to be similar to an unnamed protein (GenBank : CAO90693.1). Modelling studies of the Synechocystis TFP subunit i.e. PilA1 indicated that strategically placed aromatic amino acids may be involved in electron transfer through these nanowires. This study identifies PLS from Microcystis which can act as nanowires and supports the earlier hypothesis that microbial nanowires are widespread in nature and play erse roles.
Direct observation of defect levels in hexagonal BN by soft X-ray absorption spectroscopy
Publisher: Elsevier BV
Date: 04-2009
Scalable areal capacity of SbSxCy+z micro-thin-film cathodes for lithium-metal polysulfide batteries
Publisher: Elsevier BV
Date: 12-2022
Characteristics and Outcome of Streptococcus pneumoniae Endocarditis in the XXI Century
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 09-2015
Photoluminescence of boron nitride nanosheets exfoliated by ball milling
Publisher: AIP Publishing
Date: 25-06-2012
DOI: 10.1063/1.4731203
Abstract: The photoluminescence of boron nitride (BN) nanosheets exfoliated by ball milling method has been investigated. At room temperature, the nanosheets have strong deep ultraviolet (DUV) light emission at 224 nm and weak defect-related UV (∼300 nm) emission. The DUV peak profile slightly changes with the increase of milling time due to the increase of stacking faults caused by the shear force during milling. The decreased ∼300 nm emission after milling treatments has been attributed to the preferential orientation of the BN nanosheets on substrate and the strong polarization anisotropy of BN materials in luminescence.
Conical boron nitride nanorods synthesized via the ball-milling and annealing method
Publisher: Wiley
Date: 02-2006
Synthesis of Silicon Carbide Nanowires on Carbon Nanotube Template
Publisher: IEEE
Date: 2006
Evolution of the electrochemical capacitance of transition metal oxynitrides with time: The effect of ageing and passivation
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA00220B
Abstract: Changes in the electrochemical properties of transition metal oxynitrides upon storage in ambient air are explored for the first time, and the role of passivation is studied.
Patterned growth of carbon nanotubes on Si substrates without predeposition of metal catalysts
Publisher: AIP Publishing
Date: 11-07-2005
DOI: 10.1063/1.1995961
Abstract: Aligned carbon nanotubes (CNTs) can be readily synthesized on quartz or silicon-oxide-coated Si substrates using a chemical vapor deposition method, but it is difficult to grow them on pure Si substrates without predeposition of metal catalysts. We report that aligned CNTs were grown by pyrolysis of iron phthalocyanine at 1000°C on the templates created on Si substrates with simple mechanical scratching. Scanning electron microscopy and x-ray energy spectroscopy analysis revealed that the trenches and patterns created on the surface of Si substrates were preferred nucleation sites for nanotube growth due to a high surface energy, metastable surface structure, and possible capillarity effect. A two-step pyrolysis process maintained Fe as an active catalyst.
Mitral valve repair in infective endocarditis is not inferior to valve replacement: results from a Spanish nationwide prospective registry
Publisher: Springer Science and Business Media LLC
Date: 21-01-2019
DOI: 10.1007/S11748-019-01063-0
Abstract: Infective endocarditis (IE) still carries high morbidity and mortality and frequently requires surgery. The benefit of mitral valve repair (MVr) in the setting of IE is yet to be proven. The goal of this study was to assess the results of MVr in patients with IE after a minimum follow-up of 1 year. This study is based on a Spanish nationwide prospective registry that included patients operated on for native mitral valve IE. The collaborating Institutions pooled their pre-, peri-, and postoperative data into the database of the GAMES group [Grupo de Apoyo al Manejo de la EndocarditiS (Group for support and management of infective endocarditis)]. Data from 27 hospitals were recorded and 3524 cases of active IE identified between 2008 and 2016. There were 1513 cases of mitral IE, of which 898 involved native valves. Of these, 437 patients underwent surgical treatment, and 369 completed the 1-year follow-up. The valve was repaired in 68 cases (18.4%). Preoperative groups were comparable (EuroSCORE MVr 7.7 vs MVR 8.0 p = ns). Mortality in the repair group was inferior to that in the replacement group (16.2% vs 27.2%, p = 0.058). At 1 year, mortality remained higher in the replacement group: 3.7% vs 2.9%. Relapse of the infection was slightly more frequent in the repair group (7.1% vs 3.7% p = ns), although this did not lead to higher rates of reintervention (MVr/MVR: 2.9% vs 4.9%). MVr is an attractive option for specific patients with IE and does not seem to negatively impact on relapses.
Understanding the role of interfaces in solid-state lithium-sulfur batteries
Publisher: OAE Publishing Inc.
Date: 2022
DOI: 10.20517/ENERGYMATER.2022.46
Abstract: All-solid-state lithium-sulfur batteries (ASSLSBs) exhibit huge potential applications in electrical energy storage systems due to their unique advantages, such as low costs, safety and high energy density. However, the issues facing solid-state electrolyte (SSE)/electrode interfaces, including lithium dendrite growth, poor interfacial capability and large interfacial resistance, seriously hinder their commercial development. Furthermore, an insufficient fundamental understanding of the interfacial roles during cycling is also a significant challenge for designing and constructing high-performance ASSLSBs. This article provides an in-depth analysis of the origin and issues of SSE/electrode interfaces, summarizes various strategies for resolving these interfacial issues and highlights advanced analytical characterization techniques to effectively investigate the interfacial properties of these systems. Future possible research directions for developing high-performance ASSLSBs are also suggested. Overall, advanced in-situ characterization techniques, intelligent interfacial engineering and a deeper understanding of the interfacial properties will aid the realization of high-performance ASSLSBs.
Synthesis of porous polyvinylidene fluoride (PVDF) microspheres and their application in lithium sulfur batteries
Publisher: Elsevier BV
Date: 02-2017
Light emission and excitonic effect of boron nitride nanotubes observed by photoluminescent spectra
Publisher: Elsevier BV
Date: 07-2007
A Contemporary Picture of Enterococcal Endocarditis
Publisher: Elsevier BV
Date: 02-2020
Boron nitride colloidal solutions, ultralight aerogels and freestanding membranes through one-step exfoliation and functionalization
Publisher: Springer Science and Business Media LLC
Date: 27-11-2015
DOI: 10.1038/NCOMMS9849
Abstract: Manufacturing of aerogels and membranes from hexagonal boron nitride (h-BN) is much more difficult than from graphene or graphene oxides because of the poor dispersibility of h-BN in water, which limits its exfoliation and preparation of colloidal solutions. Here, a simple, one-step mechano-chemical process to exfoliate and functionalize h-BN into highly water-dispersible, few-layer h-BN containing amino groups is presented. The colloidal solutions of few-layer h-BN can have unprecedentedly high concentrations, up to 30 mg ml −1 , and are stable for up to several months. They can be used to produce ultralight aerogels with a density of 1.4 mg cm −3 , which is ∼1,500 times less than bulk h-BN, and freestanding membranes simply by cryodrying and filtration, respectively. The material shows strong blue light emission under ultraviolet excitation, in both dispersed and dry state.
Advanced N-doped mesoporous molybdenum disulfide nanosheets and the enhanced lithium-ion storage performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5TA10224C
Abstract: With the increasing interest in two-dimensional van der Waals materials, molybdenum disulfide (MoS 2 ) has emerged as a promising material for electronic and energy storage devices.
3D‐Printed Thermoplastic Polyurethane Electrodes for Customizable, Flexible Lithium‐Ion Batteries with an Ultra‐Long Lifetime
Publisher: Wiley
Date: 24-04-2023
Abstract: 3D printing technology has demonstrated great potential in fabricating flexible and customizable high‐performance batteries, which are highly desired in the forthcoming intelligent and ubiquitous energy era. However, a significant performance gap, especially in cycling stability, still exists between the 3D‐printed and conventional electrodes, seriously limiting the practical applications of 3D‐printed batteries. Here, for the first time, a series of thermoplastic polyurethane (TPU)‐based 3D‐printed electrodes is developed via fused deposition modeling for flexible and customizable high‐performance lithium‐ion batteries. The TPU‐based electrode filaments in kilogram order are prepared via a facile extrusion method. As a result, the electrodes are well‐printed with high dimensional accuracy, flexibility, and mechanical stability. Notably, 3D‐printed TPU‐LFP electrodes exhibit a capacity retention of 100% after 300 cycles at 1C, which is among the best cycling performance of all the reported 3D‐printed electrodes. Such excellent performance is associated with the superb stress cushioning properties of the TPU‐based electrodes that can accommodate the volume change during the cycling and thus significantly prevent the collapse of 3D‐printed electrode structures. The findings not only provide a new avenue to achieve customizable and flexible batteries but also guide a promising way to erase the performance gap between 3D‐printed and conventional lithium‐ion batteries.
Highly efficient oxygen evolution from CoS2/CNT nanocomposites via a one-step electrochemical deposition and dissolution method
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR01293D
Abstract: The oxygen evolution reaction (OER) has been viewed as a critical step in electrochemical energy conversion and storage devices. However, searching for cheap and efficient OER electrocatalysts still remains an urgent task. Herein, we develop a new strategy involving a one-step electrochemical deposition and dissolution method to fabricate hydrophilic porous CoS
Titanium Dioxide Nanotube Films for Electrochemical Supercapacitors: Biocompatibility and Operation in an Electrolyte Based on a Physiological Fluid
Publisher: The Electrochemical Society
Date: 2015
DOI: 10.1149/2.0101505JES
Sulfur-doped porous reduced graphene oxide hollow nanosphere frameworks as metal-free electrocatalysts for oxygen reduction reaction and as supercapacitor electrode materials
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR04783D
Abstract: 3D S-PGHS frameworks are used as efficient metal-free electrocatalysts for ORR and as high performance supercapacitor electrode materials.
Boron carbide nanowires with uniform CNx coatings
Publisher: IOP Publishing
Date: 23-01-2007
MoO3 nanoparticles distributed uniformly in carbon matrix for supercapacitor applications
Publisher: Elsevier BV
Date: 2012
Enhanced lithium storage in ZnFe2O4–C nanocomposite produced by a low-energy ball milling
Publisher: Elsevier BV
Date: 05-2015
Dumbbell‐Shaped Bi‐component Mesoporous Janus Solid Nanoparticles for Biphasic Interface Catalysis
Publisher: Wiley
Date: 04-05-2017
Focused ion beam milling as a universal template technique for patterned growth of carbon nanotubes
Publisher: AIP Publishing
Date: 26-02-1818
DOI: 10.1063/1.2710785
Abstract: Focused ion beam (FIB) milling system has been used to create nanosized patterns as the template for patterned growth of carbon nanotubes on Si substrate surface without predeposition of metal catalysts. Carbon nanotubes only nucleate and grow on the template under controlled pyrolysis of iron phthalocyanine at 1000°C. The size, growth direction, and density of the patterned nanotubes can be controlled under different growth conditions and template sizes. Atomic force microscopy and electron microscopy analyses reveal that the selective growth on the FIB template is due to its special surface morphology and crystalline structure.
In situ doping and synthesis of two-dimensional nanomaterials using mechano-chemistry
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NH00369F
Abstract: A new in situ , simple and economical method, that combines both doping (carbon or nitrogen) and mechanical exfoliation processes to produce large quantities of doped nanosheets in one-step.
In-situ and tunable nitrogen-doping of MoS2 nanosheets
Publisher: Springer Science and Business Media LLC
Date: 23-12-2014
DOI: 10.1038/SREP07582
Growth and structure of prismatic boron nitride nanorods
Publisher: American Physical Society (APS)
Date: 07-07-2006
Ball-milling-induced amorphization inNi
Publisher:
American Physical Society (APS)
Date:
07-1993
Publisher: American Physical Society (APS)
Date: 07-1993
Optimization of milling parameters on the synthesis of stearic acid coated CaCO3 nanoparticles
Publisher: Springer Science and Business Media LLC
Date: 17-01-2014
One-dimensional growth of TiO2 nanorods from ilmenite sands
Publisher: Elsevier BV
Date: 08-2010
Clinical Features and Outcomes of Streptococcus anginosus Group Infective Endocarditis: A Multicenter Matched Cohort Study
Publisher: Oxford University Press (OUP)
Date: 29-03-2021
DOI: 10.1093/OFID/OFAB163
Abstract: Although Streptococcus anginosus group (SAG) endocarditis is considered a severe disease associated with abscess formation and embolic events, there is limited evidence to support this assumption. We performed a retrospective analysis of prospectively collected data from consecutive patients with definite SAG endocarditis in 28 centers in Spain and Italy. A comparison between cases due to SAG endocarditis and viridans group streptococci (VGS) or Streptococcus gallolyticus group (SGG) was performed in a 1:2 matched analysis. Of 5336 consecutive cases of definite endocarditis, 72 (1.4%) were due to SAG and matched with 144 cases due to VGS/SGG. SAG endocarditis was community acquired in 64 (88.9%) cases and affected aortic native valve in 29 (40.3%). When comparing SAG and VGS/SGG endocarditis, no significant differences were found in septic shock (8.3% vs 3.5%, P = .116) valve disorder, including perforation (22.2% vs 18.1%, P = .584), pseudoaneurysm (16.7% vs 8.3%, P = .108), or prosthesis dehiscence (1.4% vs 6.3%, P = .170) paravalvular complications, including abscess (25% vs 18.8%, P = .264) and intracardiac fistula (5.6% vs 3.5%, P = .485) heart failure (34.7% vs 38.9%, P = .655) or embolic events (41.7% vs 32.6%, P = .248). Indications for surgery (70.8% vs 70.8% P = 1) and mortality (13.9% vs 16.7% P = .741) were similar between groups. SAG endocarditis is an infrequent but serious condition that presents a prognosis similar to that of VGS/SGG.
Charge-Controlled Switchable CO2 Capture on Boron Nitride Nanomaterials
Publisher: American Chemical Society (ACS)
Date: 24-05-2013
DOI: 10.1021/JA400243R
Abstract: Increasing concerns about the atmospheric CO2 concentration and its impact on the environment are motivating researchers to discover new materials and technologies for efficient CO2 capture and conversion. Here, we report a study of the adsorption of CO2, CH4, and H2 on boron nitride (BN) nanosheets and nanotubes (NTs) with different charge states. The results show that the process of CO2 capture/release can be simply controlled by switching on/off the charges carried by BN nanomaterials. CO2 molecules form weak interactions with uncharged BN nanomaterials and are weakly adsorbed. When extra electrons are introduced to these nanomaterials (i.e., when they are negatively charged), CO2 molecules become tightly bound and strongly adsorbed. Once the electrons are removed, CO2 molecules spontaneously desorb from BN absorbents. In addition, these negatively charged BN nanosorbents show high selectivity for separating CO2 from its mixtures with CH4 and/or H2. Our study demonstrates that BN nanomaterials are excellent absorbents for controllable, highly selective, and reversible capture and release of CO2. In addition, the charge density applied in this study is of the order of 10(13) cm(-2) of BN nanomaterials and can be easily realized experimentally.
Left-sided infective endocarditis in patients with liver cirrhosis
Publisher: Elsevier BV
Date: 12-2015
DOI: 10.1016/J.JINF.2015.09.005
Abstract: To evaluate the course of left-sided infective endocarditis (LsIE) in patients with liver cirrhosis (LC) analyzing its influence on mortality and the impact of surgery. Prospective cohort study, conducted from 1984 to 2013 in 26 Spanish hospitals. A total of 3.136 patients with LsIE were enrolled and 308 had LC: 151 Child-Pugh A, 103 B, 34 C and 20 were excluded because of unknown stage. Mortality was significantly higher in the patients with LsIE and LC (42.5% vs. 28.4% p < 0.01) and this condition was in general an independent worse factor for outcome (HR 1.51, 95% CI: 1.23-1.85 p < 0.001). However, patients in stage A had similar mortality to patients without cirrhosis (31.8% vs. 28.4% p = NS) and in this stage heart surgery had a protective effect (28% in operated patients vs. 60% in non-operated when it was indicated). Mortality was significantly higher in stages B (52.4%) and C (52.9%) and the prognosis was better for patients in stage B who underwent surgery immediately (mortality 50%) compared to those where surgery was delayed (58%) or not performed (74%). Only one patient in stage C underwent surgery. Patients with liver cirrhosis and infective endocarditis have a poorer prognosis only in stages B and C. Early surgery must be performed in stages A and although in selected patients in stage B when indicated.
Magnetism of C Adatoms on BN Nanostructures: Implications for Functional Nanodevices
Publisher: American Chemical Society (ACS)
Date: 20-01-2009
DOI: 10.1021/JA805632P
Abstract: Spin-polarized density functional calculations reveal that magnetism can be induced by carbon adatoms on boron nitride nanotubes (BNNTs) and BN hexagonal sheets. As a result of the localization of impurity states, these hybrid sp-electron systems are spin-polarized, with a local magnetic moment of 2.0 mu(B) per C adatom regardless of the tube diameter and the bonding between the C atom and the BNNTs/BN sheets. An analysis of orbital hybridization indicates that two valence electrons participate in the bonding and the remaining two electrons of the C adatom are confined at the adsorption site and contribute to the magnetism accordingly. The effective interaction distance between the C-induced magnetic moments is evaluated. In terms of the diffusion barrier and the adsorption energy of C adatoms on the BN nanotubes/sheets, a fabrication method for BN-C-based functional nanodevices is proposed, and a series of virtual building blocks for functional devices are illustrated.
Observation of Active Sites for Oxygen Reduction Reaction on Nitrogen-Doped Multilayer Graphene
Publisher: American Chemical Society (ACS)
Date: 03-06-2014
DOI: 10.1021/NN501506P
Abstract: Active sites and the catalytic mechanism of nitrogen-doped graphene in an oxygen reduction reaction (ORR) have been extensively studied but are still inconclusive, partly due to the lack of an experimental method that can detect the active sites. It is proposed in this report that the active sites on nitrogen-doped graphene can be determined via the examination of its chemical composition change before and after ORR. Synchrotron-based X-ray photoelectron spectroscopy analyses of three nitrogen-doped multilayer graphene s les reveal that oxygen reduction intermediate OH(ads), which should chemically attach to the active sites, remains on the carbon atoms neighboring pyridinic nitrogen after ORR. In addition, a high amount of the OH(ads) attachment after ORR corresponds to a high catalytic efficiency and vice versa. These pinpoint that the carbon atoms close to pyridinic nitrogen are the main active sites among the different nitrogen doping configurations.
Pd embedded in porous carbon (Pd@CMK-3) as an active catalyst for Suzuki reactions: Accelerating mass transfer to enhance the reaction rate
Publisher: Springer Science and Business Media LLC
Date: 24-06-2014
Atomically Thin Boron Nitride: Unique Properties and Applications
Publisher: Wiley
Date: 16-02-2016
Hybrid Artificial Solid Electrolyte Interphase with Dendrite-Free Lithium Deposition and High Ion Transport Kinetics
Publisher: American Chemical Society (ACS)
Date: 15-11-2022
Atomically Thin Boron Nitride as an Ideal Spacer for Metal-Enhanced Fluorescence
Publisher: American Chemical Society (ACS)
Date: 02-10-2019
Abstract: Metal-enhanced fluorescence (MEF) considerably enhances the luminescence for various applications, but its performance largely depends on the dielectric spacer between the fluorophore and plasmonic system. It is still challenging to produce a defect-free spacer having an optimized thickness with a sub-nanometer accuracy that enables reusability without affecting the enhancement. In this study, we demonstrate the use of atomically thin hexagonal boron nitride (BN) as an ideal MEF spacer owing to its multifold advantages over the traditional dielectric thin films. With rhodamine 6G as a representative fluorophore, it largely improves the enhancement factor (up to ∼95 ± 5), sensitivity (10
Recent Advancements in Boron Nitride Nanotube Biomedical Research
Publisher: CRC Press
Date: 24-02-2015
DOI: 10.1201/B18073-25
Documenting capacity and cyclic stability enhancements in synthetic graphite potassium-ion battery anode material modified by low-energy liquid phase ball milling
Publisher: Elsevier BV
Date: 11-2020
Influence of milling temperature and atmosphere on the synthesis of iron nitrides by ball milling
Publisher: Elsevier BV
Date: 02-1996
Surface wetting processing on BNNT films by selective plasma modes
Publisher: Springer Science and Business Media LLC
Date: 07-06-2013
In Situ Formation of BN Nanotubes during Nitriding Reactions
Publisher: American Chemical Society (ACS)
Date: 09-2005
DOI: 10.1021/CM050966F
Rare-earth doped boron nitride nanotubes
Publisher: Elsevier BV
Date: 2008
High capacity potassium-ion battery anodes based on black phosphorus
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA02483E
Abstract: Potassium electrochemistry of a battery anode based on black phosphorus is reported. The phosphorus component operates via electrochemical alloying with potassium and has a theoretical capacity of 843 mA h g −1 .
Electrochemical investigation of sodium reactivity with nanostructured Co3O4for sodium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4CC01033G
Abstract: The electrochemical behaviour of Co 3 O 4 with sodium is reported here.
Mural Endocarditis: The GAMES Registry Series and Review of the Literature
Publisher: Springer Science and Business Media LLC
Date: 26-07-2021
Solid-state formation of carbon nanotubes
Publisher: Elsevier
Date: 2006
Half metallicty in finite-length zigzag single walled carbon nanotube: A first-principle prediction
Publisher: AIP Publishing
Date: 18-08-2008
DOI: 10.1063/1.2970055
Abstract: We predict here from first-principle calculations that finite-length (n,0) single walled carbon nanotubes (SWCNTs) with H-termination at the open ends displaying antiferromagnetic coupling when n is greater than 6. An opposite local gating effect of the spin states, i.e., half metallicity, is found under the influence of an external electric field along the direction of tube axis. Remarkably, boron doping of unpassivated SWCNTs at both zigzag edges is found to favor a ferromagnetic ground state, with the B-doped tubes displaying half-metallic behavior even in the absence of an electric field. Aside of the intrinsic interest of these results, an important avenue for development of CNT-based spintronic is suggested.
Boron Nitride-Based Nanomaterials: Synthesis and Application in Rechargeable Batteries
Publisher: MDPI AG
Date: 27-06-2023
Abstract: Conventional boron nitride material is a resistant refractory compound of boron and nitrogen with various crystalline forms. The hexagonal form, which corresponds to graphite, is used as a lubricant and an additive to cosmetic products because of its higher stability and softness. Recently, various nanostructured boron nitride materials, including nanosheets, nanotubes, nanoparticles, and nanocomposites with erse new properties, have been achieved through the development of advanced synthesis techniques as well as a deeper understanding of the properties and related applications. As nanostructured boron nitride materials exhibit high chemical, thermal and mechanical stability, the incorporation of nanostructured boron nitride materials into the key components (electrolytes, separators, and electrodes) of electrochemical systems can alleviate various inherent problems. This review article systematically summarizes the integration of nanostructured boron nitride into electrolytes, separators, and electrodes of lithium-ion, sodium-ion, and lithium-sulfur batteries. Various structures, synthesis methods, properties, and electrochemical performance of nanostructured boron nitride incorporated electrolytes, separators, and electrodes in rechargeable batteries are discussed. The challenges and possibilities for future application of boron nitride-based nanomaterials in electrochemical energy storage systems are also highlighted.
Advances in synthesis and applications of boron nitride nanotubes: A review
Publisher: Elsevier BV
Date: 03-2022
Effect of sintering temperature on electrochemical performance of LiFe0·4 Mn0·6 PO4 /C cathode materials
Publisher: Informa UK Limited
Date: 07-2014
Porous boron nitride nanosheets for effective water cleaning
Publisher: Springer Science and Business Media LLC
Date: 30-04-2013
DOI: 10.1038/NCOMMS2818
Abstract: Effective removal of oils, organic solvents and dyes from water is of significant, global importance for environmental and water source protection. Advanced sorbent materials with excellent sorption capacity need to be developed. Here we report porous boron nitride nanosheets with very high specific surface area that exhibit excellent sorption performances for a wide range of oils, solvents and dyes. The nanostructured material absorbs up to 33 times its own weight in oils and organic solvents while repelling water. The saturated boron nitride nanosheets can be readily cleaned for reuse by burning or heating in air because of their strong resistance to oxidation. This easy recyclability further demonstrates the potential of porous boron nitride nanosheets for water purification and treatment.
Substitution reactions of carbon nanotube template
Publisher: AIP Publishing
Date: 29-05-2006
DOI: 10.1063/1.2208548
Abstract: Substitution reactions between carbon nanotube (CNT) template and SiO with the formation of carbon rich silicon oxide nanowires (SiO–C-NWs) have been investigated using transmission electron microscopy and x-ray energy dispersive spectroscopy. The reaction was carried out by thermal annealing at 1200°C for 1h of a mixture of silicon monoxide (SiO) and iron (II) phthalocyanine, FeC32N8H16 (FePc) powders. Multiwalled CNTs were produced first via pyrolysis of FePc at a lower temperature (1000°C). SiO vapors reacted with the CNTs at higher temperatures to produce amorphous SiO–C-NWs with a uniform diameter and a length in tens of micrometers. The special bamboolike structure of the CNTs allows the reaction to start from the external surface of the tubes and transform each CNT into a solid nanowire section by section.
Synthesis and optical properties of mullite (Al/sub 5.65/Si/sub 0.35/O/sub 9.175/) nanowires
Publisher: IEEE
Date: 2006
Pure boron nitride nanowires produced from boron triiodide
Publisher: IOP Publishing
Date: 10-01-2006
Systematic review of cross-cultural adaptations of McGill Pain Questionnaire reveals a paucity of clinimetric testing
Publisher: Elsevier BV
Date: 09-2009
DOI: 10.1016/J.JCLINEPI.2009.03.019
Abstract: The objectives of this study were to identify the available cross-cultural adaptations of the McGill Pain Questionnaire (MPQ), to describe the clinimetric testing that has occurred for each adaptation and to evaluate both the quality of the adaptation procedures and the clinimetric testing for each version. This study is a systematic review. Searches of the MEDLINE, EMBASE, and CINAHL databases were used to identify relevant studies. Data on the quality of the adaptation procedures and clinimetric testing were extracted using current guidelines. Forty-four different versions of the MPQ were identified representing 26 different languages/cultures. Regardless of the method of cross-cultural adaptation, clinimetric testing of the adapted questionnaires was generally poorly performed and for 18 versions no clinimetric testing has been undertaken. Although the MPQ has been adapted into a large number of languages, because of inadequate testing most of the adaptations have unknown clinimetric properties. This situation means that users should be cautious when interpreting scores from adapted questionnaires.
Ex situ electrochemical sodiation/desodiation observation of Co3O4anchored carbon nanotubes: a high performance sodium-ion battery anode produced by pulsed plasma in a liquid
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR03335G
Abstract: A new liquid plasma method is used to fabricate a Co 3 O 4 /CNT nanocomposite anode using a nanosecond pulse atmospheric pressure for sodium-ion battery application.
Boron Nitride Nanosheets Improve Sensitivity and Reusability of Surface-Enhanced Raman Spectroscopy
Publisher: Wiley
Date: 26-04-2016
Abstract: Surface enhanced Raman spectroscopy (SERS) is a useful multidisciplinary analytic technique. However, it is still a challenge to produce SERS substrates that are highly sensitive, reproducible, stable, reusable, and scalable. Herein, we demonstrate that atomically thin boron nitride (BN) nanosheets have many unique and desirable properties to help solve this challenge. The synergic effect of the atomic thickness, high flexibility, stronger surface adsorption capability, electrical insulation, impermeability, high thermal and chemical stability of BN nanosheets can increase the Raman sensitivity by up to two orders, and in the meantime attain long-term stability and extraordinary reusability not achievable by other materials. These advances will greatly facilitate the wider use of SERS in many fields.
Lithium ferrite (Li0.5Fe2.5O4) nanoparticles as anodes for lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA02957G
Abstract: Lithium ferrite (Li 0.5 Fe 2.5 O 4 ) nanoparticles are excellent anode materials for lithium ion batteries.
Flower stamen-like porous boron carbon nitride nanoscrolls for water cleaning
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR03084C
Abstract: New flower stamen-like porous BCN nanoscrolls display excellent dye adsorption performance, which has great potential in water cleaning.
International multicenter study comparing COVID-19 in patients with cancer to patients without cancer: Impact of risk factors and treatment modalities on survivorship
Publisher: eLife Sciences Publications, Ltd
Date: 30-01-2023
DOI: 10.7554/ELIFE.81127
Abstract: In this international multicenter study, we aimed to determine the independent risk factors associated with increased 30 day mortality and the impact of cancer and novel treatment modalities in a large group of patients with and without cancer with COVID-19 from multiple countries. We retrospectively collected de-identified data on a cohort of patients with and without cancer diagnosed with COVID-19 between January and November 2020 from 16 international centers. We analyzed 3966 COVID-19 confirmed patients, 1115 with cancer and 2851 without cancer patients. Patients with cancer were more likely to be pancytopenic and have a smoking history, pulmonary disorders, hypertension, diabetes mellitus, and corticosteroid use in the preceding 2 wk (p≤0.01). In addition, they were more likely to present with higher inflammatory biomarkers (D-dimer, ferritin, and procalcitonin) but were less likely to present with clinical symptoms (p≤0.01). By country-adjusted multivariable logistic regression analyses, cancer was not found to be an independent risk factor for 30 day mortality (p=0.18), whereas lymphopenia was independently associated with increased mortality in all patients and in patients with cancer. Older age (≥65y) was the strongest predictor of 30 day mortality in all patients (OR = 4.47, p .0001). Remdesivir was the only therapeutic agent independently associated with decreased 30 day mortality (OR = 0.64, p=0.036). Among patients on low-flow oxygen at admission, patients who received remdesivir had a lower 30 day mortality rate than those who did not (5.9 vs 17.6% p=0.03). Increased 30 day all-cause mortality from COVID-19 was not independently associated with cancer but was independently associated with lymphopenia often observed in hematolgic malignancy. Remdesivir, particularly in patients with cancer receiving low-flow oxygen, can reduce 30 day all-cause mortality. National Cancer Institute and National Institutes of Health.
Carbon nanotubes formed in graphite after mechanical grinding and thermal annealing
Publisher: Springer Science and Business Media LLC
Date: 03-2003
High-performance lithium ion batteries using SiO 2 -coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 microspheres as cathodes
Publisher: Elsevier BV
Date: 06-2017
Study on topological properties in two-dimensional grain networks via large-scale Monte Carlo simulation
Publisher: Elsevier BV
Date: 06-2015
Three-Dimensional Functionalized Boron Nitride Nanosheets/ZnO Superstructures for CO2 Capture
Publisher: American Chemical Society (ACS)
Date: 11-02-2019
Abstract: Without any extra directing agents or surfactants, three-dimensional (3D) hierarchically cubic and spherical morphologies of functionalized boron nitride nanosheets (FBNNSs)/ZnO superstructures have been controlled successfully via the evaporation-induced solvothermal synthesis. As-resulted spherical FBNNSs/ZnO superstructures not only exhibit a high capture capacity of CO
Synthesis of boron nitride nanotubes by boron ink annealing
Publisher: IOP Publishing
Date: 15-02-2010
Maricite NaFePO4/C/graphene: a novel hybrid cathode for sodium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA04946C
Abstract: A maricite hybrid cathode of NaFePO 4 /C/graphene with a novel microstructure is produced by a modified ball-milling process based on a solid-state reaction. This structure is capable of delivering high sodium storage capacity with outstanding cycle stability.
Air-Assisted Growth of Tin Dioxide Nanoribbons
Publisher: American Scientific Publishers
Date: 08-2010
Abstract: SnO2 nanoribbons have been synthesized by annealing of a milled SnO2 powder, which is able to evaporate efficiently at the temperature as low as 1100 degrees C due to the metastable structure created by ball milling treatment. When the milled powder was annealed in an assembly of two combustion boats, SnO2 nanoribbons formed on the surface of the milled powder. The nanoribbons tend to grow along the [101] crystallographic direction and their side surfaces are represented by +/- (010) and +/- (101) facets. The oxygen plays an important role in enhancing their formation.
Unusual corrugated nanowires of zinc oxide
Publisher: Elsevier BV
Date: 06-2008
Antimony-carbon nanocomposites for potassium-ion batteries: Insight into the failure mechanism in electrodes and possible avenues to improve cyclic stability
Publisher: Elsevier BV
Date: 02-2019
Single deep ultraviolet light emission from boron nitride nanotube film
Publisher: AIP Publishing
Date: 04-10-2010
DOI: 10.1063/1.3497261
Abstract: Light in deep ultraviolet (DUV) region has a wide range of applications and the demand for finding DUV light emitting materials at nanoscale is increasingly urgent as they are vital for building miniaturized optic and optoelectronic devices. We discover that boron nitride nanotubes (BNNTs) with a well-crystallized cylindrical multiwall structure and diameters smaller than 10 nm can have single DUV emission at 225 nm (5.51 eV). The measured BNNTs are grown on substrate in the form of a thin film. This study suggests that BNNTs may work as nanosized DUV light sources for various applications.
High Electrocatalytic Hydrogen Evolution Activity of an Anomalous Ruthenium Catalyst
Publisher: American Chemical Society (ACS)
Date: 06-12-2016
DOI: 10.1021/JACS.6B11291
Abstract: Hydrogen evolution reaction (HER) is a critical process due to its fundamental role in electrocatalysis. Practically, the development of high-performance electrocatalysts for HER in alkaline media is of great importance for the conversion of renewable energy to hydrogen fuel via photoelectrochemical water splitting. However, both mechanistic exploration and materials development for HER under alkaline conditions are very limited. Precious Pt metal, which still serves as the state-of-the-art catalyst for HER, is unable to guarantee a sustainable hydrogen supply. Here we report an anomalously structured Ru catalyst that shows 2.5 times higher hydrogen generation rate than Pt and is among the most active HER electrocatalysts yet reported in alkaline solutions. The identification of new face-centered cubic crystallographic structure of Ru nanoparticles was investigated by high-resolution transmission electron microscopy imaging, and its formation mechanism was revealed by spectroscopic characterization and theoretical analysis. For the first time, it is found that the Ru nanocatalyst showed a pronounced effect of the crystal structure on the electrocatalytic activity tested under different conditions. The combination of electrochemical reaction rate measurements and density functional theory computation shows that the high activity of anomalous Ru catalyst in alkaline solution originates from its suitable adsorption energies to some key reaction intermediates and reaction kinetics in the HER process.
Characteristics and predictors of death among 4035 consecutively hospitalized patients with COVID-19 in Spain
Publisher: Elsevier BV
Date: 11-2020
Tin-based composite anodes for potassium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC03649J
Abstract: An anode based on the tetragonal tin (Sn) phase that can alloy electrochemically with potassium is demonstrated for potassium-ion batteries.
Recycled value-added circular energy materials for new battery application: Recycling strategies, challenges, and sustainability-a comprehensive review
Publisher: Elsevier BV
Date: 12-2022
Challenges and solutions in surface engineering and assembly of boron nitride nanosheets
Publisher: Elsevier BV
Date: 04-2021
Infective Endocarditis in Patients With Bicuspid Aortic Valve or Mitral Valve Prolapse
Publisher: Elsevier BV
Date: 06-2018
DOI: 10.1016/J.JACC.2018.03.534
Abstract: There is little information concerning infective endocarditis (IE) in patients with bicuspid aortic valve (BAV) or mitral valve prolapse (MVP). Currently, IE antibiotic prophylaxis (IEAP) is not recommended for these conditions. This study sought to describe the clinical and microbiological features of IE in patients with BAV and MVP and compare them with those of IE patients with and without IEAP indication, to determine the potential benefit of IEAP in these conditions. This analysis involved 3,208 consecutive IE patients prospectively included in the GAMES (Grupo de Apoyo al Manejo de la Endocarditis infecciosa en España) registry at 31 Spanish hospitals. Patients were classified as high-risk IE with IEAP indication (high-risk group n = 1,226), low- and moderate-risk IE without IEAP indication (low/moderate-risk group n = 1,839), and IE with BAV (n = 54) or MVP (n = 89). BAV and MVP patients had a higher incidence of viridans group streptococci IE than did high-risk group and low/moderate-risk group patients (35.2% and 39.3% vs. 12.1% and 15.0%, respectively all p < 0.01). A similar pattern was seen for IE from suspected odontologic origin (14.8% and 18.0% vs. 5.8% and 6.0% all p < 0.01). BAV and MVP patients had more intracardiac complications than did low/moderate-risk group (50% and 47.2% vs. 30.6%, both p < 0.01) patients and were similar to high-risk group patients. IE in patients with BAV and MVP have higher rates of viridans group streptococci IE and IE from suspected odontologic origin than in other IE patients, with a clinical profile similar to that of high-risk IE patients. Our findings suggest that BAV and MVP should be classified as high-risk IE conditions and the case for IEAP should be reconsidered.
Quantitative secondary electron imaging for work function extraction at atomic level and layer identification of graphene
Publisher: Springer Science and Business Media LLC
Date: 16-02-2016
DOI: 10.1038/SREP21045
Abstract: Two-dimensional (2D) materials usually have a layer-dependent work function, which require fast and accurate detection for the evaluation of their device performance. A detection technique with high throughput and high spatial resolution has not yet been explored. Using a scanning electron microscope, we have developed and implemented a quantitative analytical technique which allows effective extraction of the work function of graphene. This technique uses the secondary electron contrast and has nanometre-resolved layer information. The measurement of few-layer graphene flakes shows the variation of work function between graphene layers with a precision of less than 10 meV. It is expected that this technique will prove extremely useful for researchers in a broad range of fields due to its revolutionary throughput and accuracy.
Ball milled SnO2: a modified vapor source for growing nanostructures
Publisher: Elsevier BV
Date: 08-2010
C-BN Single-Walled Nanotubes from Hybrid Connection of BN/C Nanoribbons: Prediction by ab initio Density Functional Calculations
Publisher: American Chemical Society (ACS)
Date: 16-01-2009
DOI: 10.1021/JA809053X
Abstract: We demonstrated for the first time by ab initio density functional calculation and molecular dynamics simulation that C(0.5)(BN)(0.5) armchair single-walled nanotubes (NT) are gapless semiconductors and can be spontaneously formed via the hybrid connection of graphene/BN Nanoribbons (GNR/BNNR) at room temperature. The direct synthesis of armchair C(0.5)(BN)(0.5) via the hybrid connection of GNR/BNNR is predicted to be both thermodynamically and dynamically stable. Such novel armchair C(0.5)(BN)(0.5) NTs possess enhanced conductance as that observed in GNRs. Additionally, the zigzag C(0.5)(BN)(0.5) SWNTs are narrow band gap semiconductors, which may have potential application for light emission. In light of recent experimental progress and the enhanced degree of control in the synthesis of GNRs and BNNR, our results highlight an interesting avenue for synthesizing a novel specific type of C(0.5)(BN)(0.5) nanotube (gapless or narrow direct gap semiconductor), with potentially important applications in BNC-based nanodevices.
Lithium-ion capacitors with 2D Nb2CTx (MXene) – carbon nanotube electrodes
Publisher: Elsevier BV
Date: 09-2016
Isotopically Enriched10BN Nanotubes
Publisher: Wiley
Date: 18-08-2006
A Review of Advanced Flexible Lithium-Ion Batteries
Publisher: Wiley
Date: 24-03-2018
Verification of a generalized Aboav-Weaire law via experiment and large-scale simulation
Publisher: IOP Publishing
Date: 03-2014
Preparation and evaluation of hydrophobically modified core shell calcium carbonate structure by different capping agents
Publisher: Elsevier BV
Date: 02-2013
One-dimensional nanomaterials synthesized using high-energy ball milling and annealing process
Publisher: Informa UK Limited
Date: 2006
Biocompatibility of boron nitride nanosheets
Publisher: Springer Science and Business Media LLC
Date: 08-06-2018
High N-content holey few-layered graphene electrocatalysts: scalable solvent-less production
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4TA05008H
Abstract: High N-content (4.9 to 17.8 at.%) holey few-layered graphene was synthesized by a facile, solvent-less, low cost and high yield process.
Advancement in liquid exfoliation of graphite through simultaneously oxidizing and ultrasonicating
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA04367G
Abstract: Simultaneously oxidizing and ultrasonicating graphite for 60 min can create high-structural integrity yet solution-processable graphene for a great many applications.
Two-Dimensional Van der Waals Heterostructures for Synergistically Improved Surface-Enhanced Raman Spectroscopy
Publisher: American Chemical Society (ACS)
Date: 22-04-2020
Boron nitride nanosheets reinforced waterborne polyurethane coatings for improving corrosion resistance and antifriction properties
Publisher: Elsevier BV
Date: 07-2018
Synthesis of nanocrystalline transition metal and oxides for lithium storage
Publisher: Elsevier BV
Date: 08-2005
Large-scale mechanical peeling of boron nitride nanosheets by low-energy ball milling
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM11192B
Atomically thin boron nitride nanodisks
Publisher: Elsevier BV
Date: 09-2013
Vibronic fine structure in high-resolution x-ray absorption spectra from ion-bombarded boron nitride nanotubes
Publisher: American Vacuum Society
Date: 03-04-2013
DOI: 10.1116/1.4798271
Abstract: The authors have applied high-resolution near-edge x-ray absorption fine structure measurements around the nitrogen K-edge to study the effects of ion-bombardment on near-surface properties of boron nitride nanotubes. A notable difference has been observed between surface sensitive partial electron yield (PEY) and bulk sensitive total electron yield (TEY) fine-structure measurements. The authors assign the PEY fine structure to the coupling of excited molecular vibrational modes to electronic transitions in NO molecules trapped just below the surface. Oxidation resistance of the boron nitride nanotubes is significantly reduced by low energy ion bombardment, as broken B-N bonds are replaced by N-O bonds involving oxygen present in the surface region. In contrast to the PEY spectra, the bulk sensitive TEY measurements on as-grown s les do not exhibit any fine structure while the ion-bombarded s les show a clear vibronic signature of molecular nitrogen.
Carbon coated Na7Fe7(PO4)6F3: A novel intercalation cathode for sodium-ion batteries
Publisher: Elsevier BV
Date: 12-2014
Synthesis of Composite Nanosheets of Graphene and Boron Nitride and Their Lubrication Application in Oil
Publisher: Wiley
Date: 29-09-2018
Stable anode performance of an Sb–carbon nanocomposite in lithium-ion batteries and the effect of ball milling mode in the course of its preparation
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA14643J
Doping engineering on carbons as electrocatalysts for oxygen reduction reaction
Publisher: Elsevier BV
Date: 11-2021
Highly Crumpled Boron Nitride Nanosheets as Adsorbents: Scalable Solvent-Less Production
Publisher: Wiley
Date: 20-01-2015
The frailty dilemma. Review of the predictive accuracy of major frailty scores
Publisher: Elsevier BV
Date: 03-2012
DOI: 10.1016/J.EJIM.2011.09.003
Abstract: To identify frail elderly in iduals, several index or scoring systems have been developed for research purposes. The practical value of these scores for screening and diagnostic use is uncertain. The available scoring systems were reviewed to determine whether they can be used in daily practice. Literature study on relevant test instruments developed for the detection of frailty on the basis of theoretical views on the frailty concept. Data on sensitivity and specificity and predictive values were extracted. Several (n=6) frailty scores were described with respect to their value as a screening or diagnostic test. Outcome of the selected test instruments is presented as a risk of negative health outcome when a test is positive. The reported AUCs of ROCs varied from 0.55 for functional decline in people admitted to an accident and emergency department to 0.87 for prediction of mortality on the basis of a co-morbidity score. As the prevalence of frailty and resulting negative health outcomes in published reports was low (5-41%), presented sensitivity and specificity values lead to low positive predictive values (6-49%) but reasonable negative predictive values (73-96%). As the number of false positive values of most available tests is substantial, these frailty scores are of limited value for both screening and diagnostic purposes in daily practice. As diagnostic instruments they can best be used to exclude frailty. The false-positive rate of currently available tests is too high to allow major decisions on medical care to be made on the basis of a positive test.
Rigorous and Accurate Contrast Spectroscopy for Ultimate Thickness Determination of Micrometer-Sized Graphene on Gold and Molecular Sensing
Publisher: American Chemical Society (ACS)
Date: 29-05-2018
Abstract: The thickness of graphene films can be accurately determined by optical contrast spectroscopy. However, this becomes challenging and complicated when the flake size reduces to the micrometer scale, where the contrast spectrum is sensitively dependent on the polarization and incident angle of light. Here, we report accurate measurement of the optical contrast spectra of micrometer-sized few-layer graphene flakes on Au substrate. Using a high-resolution optical microscopy with a 100× magnification objective, we accurately determined the layer numbers of flakes as small as one micrometer in lateral size. We developed a theoretical model to accurately take into account the appropriate contribution of light incident at various angles and polarizations, which matched the experimental results extremely well. Furthermore, we demonstrate that the optical contrast spectroscopy is highly sensitive to detect the adsorption of submonolayer airborne hydrocarbon molecules, which can reveal whether graphene is contaminated. Though the technique was demonstrated on graphene, it can be readily generalized to many other two-dimensional materials, which opens new avenues for developing miniaturized and ultrasensitive label-free molecular sensors.
Anomalous Enhancement of Mechanical Properties in the Ammonia Adsorbed Defective Graphene
Publisher: Springer Science and Business Media LLC
Date: 26-09-2016
DOI: 10.1038/SREP33810
Abstract: Pure graphene is known as the strongest material ever discovered. However, the unavoidable defect formation in the fabrication process renders the strength of defective graphene much lower (~14%) than that of its perfect counterpart. By means of density functional theory computations, we systematically explored the effect of gas molecules (H 2 , N 2 , NH 3 , CO, CO 2 and O 2 ) adsorption on the mechanical strength of perfect/defective graphene. The NH 3 molecule is found to play a dominant role in enhancing the strength of defective graphene by up to ~15.6%, while other gas molecules decrease the strength of graphene with varying degrees. The remarkable strength enhancement can be interpreted by the decomposition of NH 3 , which saturates the dangling bond and leads to charge redistribution at the defect site. The present work provides basic information for the mechanical failure of gas-adsorbed graphene and guidance for manufacturing graphene-based electromechanical devices.
Nanoparticle-mediated ultra grain refinement and reinforcement in additively manufactured titanium alloys
Publisher: Elsevier BV
Date: 10-2021
Boron nitride nanotube reinforced titanium metal matrix composites with excellent high-temperature performance
Publisher: Springer Science and Business Media LLC
Date: 29-08-2017
DOI: 10.1557/JMR.2017.345
Structure and Capacitive Properties of Porous Nanocrystalline VN Prepared by Temperature-Programmed Ammonia Reduction of V2O5
Publisher: American Chemical Society (ACS)
Date: 26-08-2009
DOI: 10.1021/CM901729X
Enhanced lithium storage in Fe2O3–SnO2–C nanocomposite anode with a breathable structure
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR00690E
Abstract: A novel nanocomposite architecture of a Fe2O3-SnO2-C anode, based on clusters of Fe2O3 and SnO2 nanoparticles dispersed along the conductive chains of Super P Li™ carbon black (Timcal Ltd.), is presented as a breathable structure in this paper for lithium-ion batteries. The synthesis of the nanocomposite is achieved by combining a molten salt precipitation process and a ball milling method for the first time. The crystalline structure, morphology, and electrochemical characterization of the synthesised product are investigated systematically. Electrochemical results demonstrate that the reversible capacity of the composite anode is 1110 mA h g(-1) at a current rate of 158 mA g(-1) with only 31% of initial irreversible capacity in the first cycle. A high reversible capacity of 502 mA h g(-1) (higher than the theoretical capacity of graphite, ~372 mA h g(-1)) can be obtained at a high current rate of 3950 mA g(-1). The electrochemical performance is compared favourably with those of Fe2O3-SnO2 and Fe2O3-SnO2-C composite anodes for lithium-ion batteries reported in the literature. This work reports a promising method for the design and preparation of nanocomposite electrodes for lithium-ion batteries.
Synaptotagmin-like proteins control the formation of a single apical membrane domain in epithelial cells
Publisher: Springer Science and Business Media LLC
Date: 22-07-2012
DOI: 10.1038/NCB2541
Large-scale production of h-In2O3/carbon nanocomposites with enhanced lithium storage properties
Publisher: Elsevier BV
Date: 07-2014
Humidity sensing properties of single Au-decorated boron nitride nanotubes
Publisher: Elsevier BV
Date: 05-2013
Lithium Germanate (Li2GeO3): A High-Performance Anode Material for Lithium-Ion Batteries
Publisher: Wiley
Date: 23-11-2016
Abstract: A simple, cost-effective, and easily scalable molten salt method for the preparation of Li
Highly Compressive Boron Nitride Nanotube Aerogels Reinforced with Reduced Graphene Oxide
Publisher: American Chemical Society (ACS)
Date: 15-06-2019
Abstract: Boron nitride nanotubes (BNNTs), structural analogues of carbon nanotubes, have attracted significant attention due to their superb thermal conductivity, wide bandgap, excellent hydrogen storage capacity, and thermal and chemical stability. Despite considerable progress in the preparation and surface functionalization of BNNTs, it remains a challenge to assemble one-dimensional BNNTs into three-dimensional (3D) architectures (such as aerogels) for practical applications. Here, we report a highly compressive BNNT aerogel reinforced with reduced graphene oxide (rGO) fabricated using a freeze-drying method. The reinforcement effect of rGO and 3D honeycomb-like framework offer the BNNTs/rGO aerogel with a high compression resilience. The BNNTs/rGO aerogels were then infiltrated with polyethylene glycol to prepare a kind of phase change materials. The prepared phase change material composites show zero leakage even at 100 °C and enhanced thermal conductivity, due to the 3D porous structure of the BNNTs/rGO aerogel. This work provides a simple method for the preparation of 3D BNNTs/rGO aerogels for many potential applications, such as high-performance polymer composites.
Fabrication of Boron Nitride Nanotube–Gold Nanoparticle Hybrids Using Pulsed Plasma in Liquid
Publisher: American Chemical Society (ACS)
Date: 25-08-2014
DOI: 10.1021/LA502960H
Abstract: Plasma, generated in liquid at atmospheric pressure by a nanosecond pulsed voltage, was used to fabricate hybrid structures from boron nitride nanotubes and gold nanoparticles in deionized water. The pH was greatly reduced, conductivity was significantly increased, and concentrations of reactive oxygen and nitrogen species in the water were increased by the plasma treatment. The treatment reduced the length of the nanotubes, giving more in idual cuplike structures, and introduced functional groups onto the surface. Gold nanoparticles were successively assembled onto the functionalized surfaces. The reactive species from the liquid plasma along with the nanosecond pulsed electric field seem to play a role in the shortening and functionalization of the nanotubes and the assembly of gold nanoparticles. The potential for targeted drug delivery was tested in a preliminary investigation using doxorubicin-loaded plasma-treated nanotubes which were effective at killing ∼99% of prostate cancer cells.
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