ORCID Profile
0000-0001-7432-7936
Current Organisation
Nanyang Technological University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Wiley
Date: 29-04-2016
Abstract: A new and generic strategy to construct interwoven carbon nanotube (CNT) branches on various metal oxide nanostructure arrays (exemplified by V2 O3 nanoflakes, Co3 O4 nanowires, Co3 O4 -CoTiO3 composite nanotubes, and ZnO microrods), in order to enhance their electrochemical performance, is demonstrated for the first time. In the second part, the V2 O3 /CNTs core/branch composite arrays as the host for Na(+) storage are investigated in detail. This V2 O3 /CNTs hybrid electrode achieves a reversible charge storage capacity of 612 mAh g(-1) at 0.1 A g(-1) and outstanding high-rate cycling stability (a capacity retention of 100% after 6000 cycles at 2 A g(-1) , and 70% after 10 000 cycles at 10 A g(-1) ). Kinetics analysis reveals that the Na(+) storage is a pseudocapacitive dominating process and the CNTs improve the levels of pseudocapacitive energy by providing a conductive network.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA03022H
Abstract: We synthesized the hierarchical porous LiNi 1/3 Co 1/3 Mn 1/3 O 2 nano-/microspheres with yolk–shell-like architecture, showing stable cycling performance and outstanding rate capability.
Publisher: IEEE
Date: 2008
Publisher: American Chemical Society (ACS)
Date: 17-09-2013
DOI: 10.1021/JZ401380P
Abstract: The specific-heat difference between the O:H van der Waals bond and the H-O polar-covalent bond and the Coulomb repulsion between electron pairs on adjacent oxygen atoms determine the angle-length-stiffness relaxation dynamics of the hydrogen bond (O:H-O), which is responsible for the density and phonon-stiffness oscillation of water ice over the full temperature range. Cooling shortens and stiffens the part of relatively lower specific-heat, and meanwhile lengthens and softens the other part of the O:H-O bond via repulsion. Length contraction/elongation of a specific part always stiffens/softens its corresponding phonon. In the liquid and in the solid phase, the O:H bond contracts more than the H-O elongates, hence, an O:H-O cooling contraction and the seemingly "regular" process of cooling densification take place. During freezing, the H-O contracts less than the O:H elongates, leading to an O:H-O elongation and volume expansion. At extremely low temperatures, the O:H-O angle stretching lowers the density slightly as the O:H and the H-O lengths change insignificantly. In ice, the O-O distance is longer than it is in water, resulting in a lower density, so that ice floats.
Publisher: Wiley
Date: 22-12-2014
Publisher: Springer Science and Business Media LLC
Date: 04-2018
DOI: 10.1038/S41586-018-0008-3
Abstract: Investigations of two-dimensional transition-metal chalcogenides (TMCs) have recently revealed interesting physical phenomena, including the quantum spin Hall effect
Publisher: American Chemical Society (ACS)
Date: 29-07-2015
Publisher: Springer Science and Business Media LLC
Date: 26-10-2015
DOI: 10.1038/SREP15665
Abstract: A stable Si-based anode with a high initial coulombic efficiency (ICE) for lithium-ion batteries (LIB) is critical for energy storage. In the present paper, a new scalable method is adopted in combination with giant nitrogen-doped graphene and micron-size electrode materials. We first synthesize a new type of freestanding LIB anode composed of micron-sized Si (mSi) particles wrapped by giant nitrogen-doped graphene (mSi@GNG) film. High ICE ( %) and long cycle life (more than 80 cycles) are obtained. In the mSi@GNG composite, preferential formation of a stable solid electrolyte interphase (SEI) on the surface of graphene sheets is achieved. The formation and components of SEI are identified for the first time by using UV-resonance Raman spectroscopy and Raman mapping, which will revive the study of formation and evolution of SEI by Raman. New mechanism is proposed that the giant graphene sheets protect the mSi particles from over-lithiation and fracture. Such a simple and scalable method may also be applied to other anode systems to boost their energy and power densities for LIB.
Publisher: Wiley
Date: 20-02-2017
Publisher: Wiley
Date: 08-08-2019
Publisher: American Chemical Society (ACS)
Date: 02-06-2016
Abstract: The lithium-sulfur (Li-S) battery presents a promising rechargeable energy storage technology for the increasing energy demand in a worldwide range. However, current main challenges in Li-S battery are structural degradation and instability of the solid-electrolyte interphase caused by the dissolution of polysulfides during cycling, resulting in the corrosion and loss of active materials. Herein, we developed novel hybrids by employing metal-organic polyhedron (MOP) encapsulated PVP-functionalized sulfur nanoparticles (S@MOP), where the active sulfur component was efficiently encapsulated within the core of MOP and PVP as a surfactant was helpful to stabilize the sulfur nanoparticles and control the size and shape of corresponding hybrids during their syntheses. The amount of sulfur embedded into MOP could be controlled according to requirements. By using the S@MOP hybrids as cathodes, an obvious enhancement in the performance of Li-S battery was achieved, including high specific capacity with good cycling stability. The MOP encapsulation could enhance the utilization efficiency of sulfur. Importantly, the structure of the S@MOP hybrids was very stable, and they could last for almost 1000 cycles as cathodes in Li-S battery. Such high performance has rarely been obtained using metal-organic framework systems. The present approach opens up a promising route for further applications of MOP as host materials in electrochemical and energy storage fields.
Publisher: IOP Publishing
Date: 25-04-2018
Publisher: Wiley
Date: 03-04-2017
Abstract: Due to the intriguing optical and electronic properties, 2D materials have attracted a lot of interest for the electronic and optoelectronic applications. Identifying new promising 2D materials will be rewarding toward the development of next generation 2D electronics. Here, palladium diselenide (PdSe
Publisher: Springer Science and Business Media LLC
Date: 30-06-2016
DOI: 10.1038/NCOMMS12122
Abstract: Sodium-ion batteries are a potentially low-cost and safe alternative to the prevailing lithium-ion battery technology. However, it is a great challenge to achieve fast charging and high power density for most sodium-ion electrodes because of the sluggish sodiation kinetics. Here we demonstrate a high-capacity and high-rate sodium-ion anode based on ultrathin layered tin(II) sulfide nanostructures, in which a maximized extrinsic pseudocapacitance contribution is identified and verified by kinetics analysis. The graphene foam supported tin(II) sulfide nanoarray anode delivers a high reversible capacity of ∼1,100 mAh g −1 at 30 mA g −1 and ∼420 mAh g −1 at 30 A g −1 , which even outperforms its lithium-ion storage performance. The surface-dominated redox reaction rendered by our tailored ultrathin tin(II) sulfide nanostructures may also work in other layered materials for high-performance sodium-ion storage.
Publisher: American Chemical Society (ACS)
Date: 10-09-2015
Abstract: Dark-field microscopy is a widely used tool for measuring the optical resonance of plasmonic nanostructures. However, current numerical methods for simulating the dark-field scattering spectra were carried out with plane wave illumination either at normal incidence or at an oblique angle from one direction. In actual experiments, light is focused onto the s le through an annular ring within a range of glancing angles. In this paper, we present a theoretical model capable of accurately simulating the dark-field light source with an annular ring. Simulations correctly reproduce a counterintuitive blue shift in the scattering spectra from gold nanodisks with a diameter beyond 140 nm. We believe that our proposed simulation method can be potentially applied as a general tool capable of simulating the dark-field scattering spectra of plasmonic nanostructures as well as other dielectric nanostructures with sizes beyond the quasi-static limit.
Publisher: Elsevier BV
Date: 12-2017
Publisher: Springer Science and Business Media LLC
Date: 17-12-2010
Publisher: Elsevier BV
Date: 12-2017
Publisher: IOP Publishing
Date: 08-07-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA04959A
Abstract: Well dispersed Cu 3 P dots embedded in a C matrix giving high Li-ion storage activity, improved electronic conductivity and stability are induced via a self-adaptive electrochemical reconstruction upon cycling, which triggers exceptional performance.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1RA03965B
Abstract: Structural and optical properties of MA x Cs 1−x PbBr 3 mixed cation colloidal nanoparticles with 13 mol% Cs composition exhibiting the longest charge carrier lifetime and enhancement in radiative pathways.
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 06-2009
Publisher: Elsevier BV
Date: 07-2017
Publisher: Wiley
Date: 02-06-2014
Abstract: A thin polymer shell helps V2O5 a lot. Short V2O5 nanobelts are grown directly on 3D graphite foam as a lithium-ion battery (LIB) cathode material. A further coating of a poly(3,4-ethylenedioxythiophene) (PEDOT) thin shell is the key to the high performance. An excellent high-rate capability and ultrastable cycling up to 1000 cycles are demonstrated.
Publisher: AIP Publishing
Date: 03-11-2008
DOI: 10.1063/1.3013845
Abstract: High performance organic field effect transistors using a solution-processable processed trilayer sol-gel silica gate dielectric architecture fabricated on plastic substrates exhibited low driving voltages of −3.0V, high saturation mobilities of ∼3.5cm2∕Vs, and on-off current ratio of 105. The enhancement in field effect mobility is attributed to improved dielectric-semiconductor interfacial morphology and increased capacitance of the tristratal dielectric. The pentacene devices displayed no signs of electrical degradation upon bending through a bending radius of 24mm, 2.27% strain. The slight increase in the drain currents upon bending strain was investigated using Raman spectroscopy, which revealed enhanced in-phase intermolecular coupling.
Publisher: American Chemical Society (ACS)
Date: 26-12-2014
DOI: 10.1021/NL504038S
Abstract: Nanoscale surface engineering is playing important role in enhancing the performance of battery electrode. VO2 is one of high-capacity but less-stable materials and has been used mostly in the form of powders for Li-ion battery cathode with mediocre performance. In this work, we design a new type of binder-free cathode by bottom-up growth of biface VO2 arrays directly on a graphene network for both high-performance Li-ion and Na-ion battery cathodes. More importantly, graphene quantum dots (GQDs) are coated onto the VO2 surfaces as a highly efficient surface "sensitizer" and protection to further boost the electrochemical properties. The integrated electrodes deliver a Na storage capacity of 306 mAh/g at 100 mA/g, and a capacity of more than 110 mAh/g after 1500 cycles at 18 A/g. Our result on Na-ion battery may pave the way to next generation postlithium batteries.
Publisher: Elsevier BV
Date: 10-2015
Publisher: American Scientific Publishers
Date: 10-2007
DOI: 10.1166/JNN.2007.807
Abstract: Ni-doped ZnO flower-like nanocones with wurzite structures were produced by oxidative evaporation of Zn and Ni powders. The Ni doping did not change the ZnO wurtzite structure. Raman scattering indicated that the normal lattice vibration modes are related to the hexagonal ZnO. Ni clusters and Ni oxides phases did not existed in the s le as characterized by XRD, XPS, and TEM. Upon excitations the nanocones could emit strong green light at 525 nm, which can be directly observed with a digital camera. The magnetic measurement indicated that the Ni-doped ZnO nanocone was high-Curie-temperature magnetic semiconductor.
Publisher: AIP Publishing
Date: 09-05-2011
DOI: 10.1063/1.3589970
Abstract: We report room temperature ferromagnetism in partially hydrogenated epitaxial graphene grown on 4HSiC(0001). The presence of ferromagnetism was confirmed by superconducting quantum interference devices measurements. Synchrotron-based near-edge x-ray absorption fine structure and high resolution electron energy loss spectroscopy measurements have been used to investigate the hydrogenation mechanism on the epitaxial graphene and the origin of room temperature ferromagnetism. The partial hydrogenation induces the formation of unpaired electrons in graphene, which together with the remnant delocalized π bonding network, can explain the observed ferromagnetism in partially hydrogenated epitaxial graphene.
Publisher: Wiley
Date: 27-11-2017
Abstract: High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high-pressure-induced comminution and recrystallization of organic-inorganic hybrid perovskite nanocrystals into highly luminescent nanoplates with a shorter carrier lifetime. Such novel pressure response is attributed to the unique structural nature of hybrid perovskites under high pressure: during the drastic cubic-orthorhombic structural transformation at ≈2 GPa, (301) the crystal plane fully occupied by organic molecules possesses a higher surface energy, triggering the comminution of nanocrystals into nanoslices along such crystal plane. Beyond bulk perovskites, in which pressure-induced modifications on crystal structures and functional properties will disappear after pressure release, the pressure-formed variants, i.e., large (≈100 nm) and thin (<10 nm) perovskite nanoplates, are retained and these exhibit simultaneous photoluminescence emission enhancing (a 15-fold enhancement in the photoluminescence) and carrier lifetime shortening (from ≈18.3 ± 0.8 to ≈7.6 ± 0.5 ns) after releasing of pressure from 11 GPa. This pressure-induced comminution of hybrid perovskite NCs and a subsequent amorphization-recrystallization treatment offer the possibilities of engineering the advanced hybrid perovskites with specific properties.
Publisher: American Chemical Society (ACS)
Date: 27-02-2009
DOI: 10.1021/NN800808S
Abstract: We report the fabrication and characterization of ZnO nanowire memory devices using a ferroelectric Pb(Zr(0.3)Ti(0.7))O(3) (PZT) film as the gate dielectric and the charge storage medium. With a comparison to nanowire transistors based on SiO(2) gate oxide, the devices were evaluated in terms of their electric transport, retention, and endurance performance. Memory effects are observed as characterized by an eminent counterclockwise loop in I-V(g) curves, which is attributed to the switchable remnant polarization of PZT. The single-nanowire device exhibits a high (up to 10(3)) on/off ratio at zero gate voltage. Our results give a proof-of-principle demonstration of the memory application based on a combination of nanowires (as channels) and ferroelectric films (as gate oxide).
Publisher: Springer Science and Business Media LLC
Date: 17-05-1970
DOI: 10.1038/SREP25771
Abstract: Although being considered as one of the most promising cathode materials for Lithium-ion batteries (LIBs), LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) is currently limited by its poor rate performance and cycle stability resulting from the thermodynamically favorable Li + /Ni 2+ cation mixing which depresses the Li + mobility. In this study, we developed a two-step method using fluffy MnO 2 as template to prepare hierarchical porous nano-/microsphere NCM (PNM-NCM). Specifically, PNM-NCM microspheres achieves a high reversible specific capacity of 207.7 mAh g −1 at 0.1 C with excellent rate capability (163.6 and 148.9 mAh g −1 at 1 C and 2 C), and the reversible capacity retention can be well-maintained as high as 90.3% after 50 cycles. This excellent electrochemical performance is attributed to unique hierarchical porous nano-/microsphere structure which can increase the contact area with electrolyte, shorten Li + diffusion path and thus improve the Li + mobility. Moreover, as revealed by XRD Rietveld refinement analysis, a negligible cation mixing (1.9%) and high crystallinity with a well-formed layered structure also contribute to the enhanced C-rates performance and cycle stability. On the basis of our study, an effective strategy can be established to reveal the fundamental relationship between the structure/chemistry of these materials and their properties.
Publisher: Elsevier BV
Date: 11-2004
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA23228K
Abstract: A new nitrogen-doped graphene-coated graphite anode achieved a high reversible capacity, surpassing the theoretical value for graphite. The reported scalable synthesis method may also be applied to other anode systems.
Publisher: Royal Society of Chemistry (RSC)
Date: 02-04-2014
DOI: 10.1039/C4NR01119H
Abstract: A novel three-dimensional (3D) metal/metal oxide core/branch array electrode has been fabricated as a supercapacitor electrode. Hollow Ni nanocorn arrays are constructed on Ni foams and act as a highly conductive and stable support to Co3O4 nanoflakes. Enhanced pseudocapacitive performance compared to bare Co3O4 nanosheets is demonstrated with high rate capability and excellent cycling stability.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4MH00212A
Abstract: VO 2 nanoarrays are grown on graphene foam and the surface is coated with HMB for performance enhancement as LIB and supercapacitor electrodes.
Publisher: Wiley
Date: 24-09-2014
Abstract: Honeycomb-like MoS2 nanoarchitectures anchored into 3D graphene foam are successfully fabricated as a high-performance positive electrode for enhanced Li-ion storage. The unique 3D interpenetrating honeycomb-like structure is the key to the high performance. High reversible capacity, superior high-rate capability, and excellent cycling stability are demonstrated.
Publisher: Wiley
Date: 12-03-2018
Publisher: American Chemical Society (ACS)
Date: 18-01-2022
Abstract: Extending halide perovskites' optoelectronic properties to stimuli-responsive chromism enables switchable optoelectronics, information display, and smart window applications. Here, we demonstrate a band gap tunability (chromism) via crystal structure transformation from three-dimensional FAPbBr
Publisher: Elsevier BV
Date: 06-2000
Publisher: Elsevier BV
Date: 10-2014
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA03870G
Abstract: The sp 2 -hybridized GF/CNT film provides a robust framework with an ideal contact for boosting the vast growth of MoS 2 nanosheets and immobilizing them, in favor of an increased areal loading but improved stability of the active materials.
Publisher: Wiley
Date: 05-10-2009
Publisher: OSA
Date: 2015
Publisher: IOP Publishing
Date: 13-01-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR02028G
Abstract: Due to the easy intralayer gliding and weak interlayer van der Waals interaction in transition metal dichalcogenides (TMDs), ion (particularly Li
Publisher: AIP Publishing
Date: 04-2004
DOI: 10.1063/1.1695438
Abstract: Co-ferrite films were deposited on SiO2 single-crystal substrates. The as-deposited films were amorphous. The crystallization required an annealing at 700 °C or higher. Magnetic properties were found to be strongly dependent on annealing temperature, annealing duration, and film thickness. A small film thickness can restrict the formation of large particles. A coercivity as high as 9.3 kOe was achieved in the 50 nm film after annealing at 900 °C for 15 min deposited on (100)-SiO2 substrate. The high coercivity was associated with a nanostructure, lattice strain, and larger Raman shift with a relatively sharp peak.
Publisher: AIP Publishing
Date: 28-04-2008
DOI: 10.1063/1.2918447
Abstract: Designing geometrical structures and making chemical modifications are two effective routes to tailor wettability. ZnO-based hierarchical nanostructures, in particular, vertically aligned nanoneedles and nanonails were employed as a platform to study the effect of surface morphology. The hydrophobicity and the variation of contact angle in the as-grown s les were attributed to the combined effects of surface roughness and partial water-solid contact. Subsequent chemical modifications with stearic acid led to superhydrophobic ZnO surfaces, while annealing in air resulted into superhydrophilicity. Under the alternations of coating and removal of stearic acid, reversible transitions between superhydrophilicity and hydrophobicity were realized.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA01979B
Abstract: A simple, low-cost and energy-effective method has been developed to fabricate giant graphene sheets by double microwave assisted exfoliations.
Publisher: AIP Publishing
Date: 15-10-2009
DOI: 10.1063/1.3251370
Abstract: We investigate the photoconductivity properties of ZnO thin films prepared by pulsed laser deposition with and without metals (Au or Pt) on the surface. The covering of nanostructured metals can largely enhance the photocurrent. Meanwhile, the dark currents have been increased significantly due to the increase in carrier concentration and mobility near the surface of ZnO thin film. Although plasmonic effect was observed by the photoluminescence enhancement, the main mechanism of the increase in the dark current and photoresponsivity for ZnO photoconductors has been interpreted by surface states, interface states, and persistent photoconductivity.
Publisher: Elsevier BV
Date: 10-2016
Publisher: Wiley
Date: 27-10-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B822507A
Abstract: A simple and one-step method to rapidly synthesize single crystalline ultrathin gold nanowires at room temperature within a few hours has been developed, and the self-assembled ultrathin gold nanowires demonstrated an intriguing application in surface-enhanced Raman scattering (SERS).
Publisher: IOP Publishing
Date: 02-02-2009
DOI: 10.1088/0957-4484/20/8/085203
Abstract: We report the properties of a field effect transistor (FET) and a gas sensor based on CuO nanowires. CuO nanowire FETs exhibit p-type behavior. Large-scale p-type CuO nanowire thin-film transistors (10(4) devices in a 25 mm(2) area) are fabricated and we effectively demonstrate their enhanced performance. Furthermore, CuO nanowire exhibits high and fast response to CO gas at 200 degrees C, which makes it a promising candidate for a poisonous gas sensing nanodevice.
Publisher: American Chemical Society (ACS)
Date: 03-07-2017
Publisher: SPIE-Intl Soc Optical Eng
Date: 2008
DOI: 10.1117/1.2976140
Abstract: The use of microfluidics for biofluid analysis offers a cheaper alternative to conventional techniques in disease diagnosis. However, traditional microfluidics design may be complicated by the need to incorporate separation elements into the system in order to facilitate specific molecular detection. Alternatively, an optical technique known as surface-enhanced Raman spectroscopy (SERS) may be used to enable identification of analyte molecules directly from a complex s le. This will not only simplify design but also reduce overall cost. The concept of SERS-based microfluidics is however not new and has been demonstrated previously by mixing SERS-active metal nanoparticles with a model s le, in situ, within the microchannel. Although the SERS reproducibility of these systems was shown to be acceptable, it is, however, not stable toward variations in the salt content of the s le, as will be shown in this study. We have proposed a microfluidics design whereby periodic SERS-active metal nanostructures are fabricated directly into the microchannel via a simple method of spin coating. Using artificial as well as human urine s les, we show that the current microfluidics is more stable toward variations in the s le's ionic strength.
Publisher: American Chemical Society (ACS)
Date: 25-10-2016
Abstract: The abundant reserve and low cost of sodium have provoked tremendous evolution of Na-ion batteries (SIBs) in the past few years, but their performances are still limited by either the specific capacity or rate capability. Attempts to pursue high rate ability with maintained high capacity in a single electrode remains even more challenging. Here, an elaborate self-branched 2D SnS
Publisher: Elsevier BV
Date: 02-2016
Publisher: Elsevier BV
Date: 12-2014
Publisher: American Chemical Society (ACS)
Date: 27-08-2009
DOI: 10.1021/NN9006797
Abstract: We report a general thermal transformation approach to synthesize single-crystalline magnetic transition metal oxides nanotubes/nanorings including magnetite Fe(3)O(4), maghematite gamma-Fe(2)O(3), and ferrites MFe(2)O(4) (M = Co, Mn, Ni, Cu) using hematite alpha-Fe(2)O(3) nanotubes/nanorings template. While the straightforward reduction or reduction-oxides process was employed to produce Fe(3)O(4) and gamma-Fe(2)O(3), the alpha-Fe(2)O(3)/M(OH)(2) core/shell nanostructure was used as precursor to prepare MFe(2)O(4) nanotubes via MFe(2)O(4-x) (0 < x < 1) intermediate. The transformed ferrites nanocrystals retain the hollow structure and single-crystalline nature of the original templates. However, the crystallographic orientation-relationships of cubic spinel ferrites and trigonal hematite show strong correlation with their morpologies. The hollow-structured MFe(2)O(4) nanocrystals with tunable size, shape, and composition have exhibited unique magnetic properties. Moreover, they have been demonstrated as a highly effective peroxidase mimic catalysts for laboratory immunoassays or as a universal nanocapsules hybridized with luminescent QDs for magnetic separation and optical probe of lung cancer cells, suggesting that these biocompatible magnetic nanotubes/nanorings have great potential in biomedicine and biomagnetic applications.
Publisher: IOP Publishing
Date: 20-01-2010
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA02888A
Abstract: In this work is reported the successful synthesis of 1D nanobar-like LiNi 0.4 Co 0.2 Mn 0.4 O 2 (N-NCM), preferentially exposing the {010} electrochemically active facets.
Publisher: AIP Publishing
Date: 10-2008
DOI: 10.1063/1.2981189
Abstract: Single-crystalline, transparent conducting ZnO nanowires were obtained simply by Ti plasma immersion ion implantation (PIII). Electrical transport characterizations demonstrate that the n-type conduction of ZnO nanowire could be tuned by appropriate Ti-PIII. When the energy of PIII is increased, the resistivity of ZnO decreases from 4×102 to 3.3×10−3 Ω cm, indicating a semiconductor-metal transition. The failure-current densities of the metallic ZnO could be up to 2.75×107 A/cm2. Therefore, this facile method may provide an inexpensive alternative to tin doped indium oxide as transparent conducting oxide materials.
Publisher: AIP Publishing
Date: 16-03-2009
DOI: 10.1063/1.3097029
Abstract: Cu 2 O nanowires are synthesized by reduction of CuO nanowires with hydrogen gas. Strong green photoluminescence dominated by band-edge emission is observed. Field effect transistors fabricated from in idual Cu2O nanowires present high on-off ratio (& ) and high mobility (& cm2/V s). Furthermore, the device demonstrates a fast photoelectric response to blue illumination in air at room temperature. In addition, anomalous ferromagnetism appears in Cu2O nanowires, which may originate from the defects in Cu2O nanowires. This work shows the application potentials of the Cu2O nanowires, especially in an electrical and photonic device.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA22673E
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Zexiang Shen.