A5075455285- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Electronic and Structural Properties of Oxides
- Photorefractive and Nonlinear Optics
- Magnetic and transport properties of perovskites and related materials
- ZnO doping and properties
- Chalcogenide Semiconductor Thin Films
- Advanced Sensor and Energy Harvesting Materials
- Dielectric properties of ceramics
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- 2D Materials and Applications
- Magnetic properties of thin films
- Advanced Condensed Matter Physics
- Semiconductor materials and devices
- TiO2 Photocatalysis and Solar Cells
- Graphene research and applications
- Magneto-Optical Properties and Applications
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- Glass properties and applications
- Advanced Photocatalysis Techniques
- Luminescence Properties of Advanced Materials
Hong Kong Polytechnic University
2015-2024
Nanjing University
2008
National Laboratory of Solid State Microstructures
2008
Zhejiang University
2007
State Key Laboratory of Silicon Materials
2007
The Ohio State University
1992-1996
Case Western Reserve University
1990
A major challenge that prohibits the practical application of single/double-transition metal (3d-M) oxides as oxygen evolution reaction (OER) catalysts is high overpotentials during electrochemical process. Herein, our theoretical calculation shows Fe will be more energetically favorable in tetrahedral site than Ni and Co, which can further regulate their electronic structure binary NiCo spinel for optimal adsorption energies OER intermediates improved conductivity hence boost performance....
Noninvasive glucose detections are convenient techniques for the diagnosis of diabetes mellitus, which require high performance sensors. However, conventional electrochemical sensors not sensitive enough these applications. Here, highly successfully realized based on whole-graphene solution-gated transistors with graphene gate electrodes modified an enzyme oxidase. The sensitivity devices is dramatically improved by co-modifying gates Pt nanoparticles due to enhanced electrocatalytic...
Nanocrystalline titanium dioxide has been prepared under ambient pressure and at temperatures close to or approaching room temperature using hydrolysis of tetraisopropoxide in an acidic aqueous solution. A transparent thin layer nanocrystalline titania produced on cotton textiles by a dip-pad–dry-cure process. These TiO2 coated possess significant photocatalytic self-cleaning properties, such as bactericidal activity, colorant stain decomposition degradation red wine coffee stains. The UV...
We developed a facile hydrothermal method for synthesizing ultrafine size-controllable earth-abundant Cu2ZnSnS4 (CZTS) nanocrystals using simple Cu(II), Zn(II) and Sn(II) inorganic salts thiourea in mixed ethylenediamine di-water solution as precursors. X-ray diffraction, Raman scattering transmission electron microscopy confirm that pure kesterite structure CZTS have been synthesized at temperatures low 180 °C. Broadening of peaks blue-shift the absorption edge is attributed to quantum...
Upconversion photoluminescence (PL) of Er 3+ -doped BaTiO 3 (BTO) with perovskite ABO structure is studied in terms substitutions for Ba (A-) and Ti (B-site) different doping concentrations.PL quenching an increase concentration investigated based on the structural change energy transfer crossrelaxation process BTO: Er, i.e. 2 H 11/2 + 4 I 15/2 → 9/2 13/2 .Temperature dependence PL revealed, which associated phase transitions BTO host.The results imply that emission from substituted ions may...
Anatase TiO2/SiO2 nanocomposites were prepared by a sol–gel process at low temperature. The structural properties of these as-prepared characterized with scanning electron microscopy (SEM) and X-ray diffraction (XRD), showing that TiO2 nanoparticles deposited on the surface SiO2 spheres. spherical coated onto cotton fabrics simple dip-pad–dry-cure process. treated demonstrated higher photocatalytic activity in comparison to pure typical test using model compound Neolan Blue 2G dye. Our...
Commercial Dacron cloth is directly used as a substrate for the growth of Cu(OH)<sub>2</sub> nanobelt arrays application in flexible all-solid-state supercapacitors.
Metal-phosphorus-trichalcogenides (MPTs), represented by NiPS3, FePS3, etc, are newly developed 2D wide-bandgap semiconductors and have been proposed as excellent candidates for ultraviolet (UV) optoelectronics. In spite of having superior advantages solar-blind UV photodetectors, including those free surface trap states, being highly compatible with versatile integrations well an appropriate band gap, to date relevant study is rare. this work, the photoresponse characteristic detectors...
Compositionally graded barium strontium titanate [(BaxSr1−x)TiO3—BST, x=0.75, 0.8, 0.9, and 1.0] thin films are fabricated by pulsed-laser deposition on a LaAlO3 substrate with (La0.7Sr0.3)MnO3 as the bottom electrode. A high dielectric permittivity temperature characteristic without Curie–Weiss law obtained. tunability of over 70% is obtained at frequency 1 MHz, which higher than that single BST layer same compositions. All results indicate have better electrical properties single-layer film.
Anatase TiO 2 prepared by an aqueous sol–gel process at 60°C was applied to polyester fibers that were treated with low‐temperature plasma. This not only functionalizes but also enhances its adhesion the anatase. The self‐cleaning properties, such as bactericidal activities, colorant decomposition, and degradation of red wine coffee stains, anatase functionalized studied. surface morphological changes before after plasma treatment, plasma‐treated coating characterized scanning electron...
Rare-earth (RE) (Eu3+, Gd3+, Tb3+, and Dy3+)-doped BiFeO3 (BFO) ceramics were prepared by a modified solid-state reaction method, which adopted higher heating as well cooling rates during sintering process. All the fabricated samples showed ferroelectric hysteresis loops with remnant polarization of 21–35 μC/cm2. A piezoelectric coefficient (d33) ∼48 pC/N was obtained this value to be composition independent. The pyroelectric properties our studied function temperature. Generally, slightly...
ITO/Au/ITO trilayers with varying gold spacer layer thicknesses were deposited on glass substrates by pulsed laser deposition. Transmission electron microscopy measurements demonstrated the continuous nature of Au down to 2.4 nm. XRD patterns clearly showed an enhanced crystallinity ITO films promoted insertion layer. Compared a single carrier concentration 7.12 × 10(20) cm(-3), structure achieved effective as high 3.26 10(22) cm(-3). Transmittance and ellipsometry that optical properties...
Spectral properties of blue upconversion luminescences in Tm3+ doped tellurite (PWT, PbF2-WO3-TeO2) glasses and germanate (PWG, PbF2-WO3-GeO2) pumped by a tunable dye laser were studied at room temperature. Two emission bands centered 453 477 nm, corresponding to the D21→H43 G41→H63 transitions ions respectively, observed. The two-photon absorption mechanism responsible for nm luminescence was confirmed quadratic dependence luminescent intensities on excitation power. Tellurite showed weaker...
A metal layer, used as a current collector layer for textile-based supercapacitor (SC), was prepared on polyethylene terephthalate (PET) fabrics using wet chemical methods.
Cobalt ferrite (CoFe2O4, CFO) nanoplatelets with a rhomboidal shape were synthesized through facile hydrothermal route using very low concentration precursor at temperatures. The effects of reaction temperature and time on the morphologies as well sizes products systemically investigated. as-synthesized CFO nanocrystals showed special crystal growth along (111) direction. plays an important role in forming such ultrafine size. single-phase 180 °C size 17 nm present high saturation...
The nucleation of crystals from ubiquitous solid-state reactions impacts a wide range natural and synthetic processes is fundamental to physical chemical synthesis. However, the microscopic organization mechanism amorphous precursors nanoscale clusters ordered atoms (nucleus) in an all-solid environment inaccessible by common experimental probes. Here, using situ transmission electron microscopy combination with theoretical simulations, we show reactive formation metal carbide that actually...