A5053188695- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Nanocluster Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Wastewater Treatment and Nitrogen Removal
- Copper-based nanomaterials and applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- Advanced biosensing and bioanalysis techniques
- Metamaterials and Metasurfaces Applications
- Advanced Nanomaterials in Catalysis
- Catalytic Processes in Materials Science
- Nanoplatforms for cancer theranostics
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- Photonic Crystals and Applications
- Mesoporous Materials and Catalysis
- Crystallography and molecular interactions
- Microbial Fuel Cells and Bioremediation
- Nanoparticle-Based Drug Delivery
- Molecular Junctions and Nanostructures
- 2D Materials and Applications
- ZnO doping and properties
- Nanowire Synthesis and Applications
Chinese University of Hong Kong
2016-2025
Suzhou University of Science and Technology
2015-2024
National University of Defense Technology
2006-2024
Zhejiang Sci-Tech University
2024
Chinese University of Hong Kong, Shenzhen
2015-2023
Shanghai East Hospital
2020-2023
Fourth Hospital of Hebei Medical University
2023
Hebei Medical University
2023
Prince of Wales Hospital
2015-2023
South China Agricultural University
2023
We have characterized the fundamental photoluminescence (PL) properties of individual, isolated indium phosphide (InP) nanowires to define their potential for optoelectronics. Polarization-sensitive measurements reveal a striking anisotropy in PL intensity recorded parallel and perpendicular long axis nanowire. The order-of-magnitude polarization was quantitatively explained terms large dielectric contrast between these free-standing surrounding environment, as opposed quantum confinement...
Gold nanoparticles of different shapes and sizes, including nanospheres, nanocubes, nanobranches, nanorods, nanobipyramids, were dispersed into water−glycerol mixtures varying volume ratios to investigate the response their surface plasmon peaks refractive index surrounding medium. The sensitivities figures merit found be dependent on both shape size Au nanoparticles. generally increase as become elongated apexes sharper. nanospheres exhibit smallest sensitivity 44 nm/RIU nanobranches...
Monodisperse silicon nanowires were synthesized by exploiting well-defined gold nanoclusters as catalysts for one-dimensional growth via a vapor–liquid–solid mechanism. Transmission electron microscopy studies of the materials grown from 5, 10, 20, and 30 nm nanocluster showed that had mean diameters 6, 12, 31 nm, respectively, thus well defined sizes. High-resolution transmission demonstrated have single-crystal cores sheathed with 1–3 amorphous oxide remain highly crystalline small 2 nm.
The limitations of the Haber-Bosch reaction, particularly high-temperature operation, have ignited new interests in low-temperature ammonia-synthesis scenarios. Ambient N2 electroreduction is a compelling alternative but impeded by low ammonia production rate (mostly <10 mmol gcat-1 h-1), small partial current density (<1 mA cm-2), and high-selectivity hydrogen-evolving side reaction. Herein, we report that room-temperature nitrate catalyzed strained ruthenium nanoclusters generates at...
Selective organic transformation under mild conditions constitutes a challenge in green chemistry, especially for alcohol oxidation, which typically requires environmentally unfriendly oxidants. Here, we report new plasmonic catalyst of Au supported on BiOCl containing oxygen vacancies. It photocatalyzes selective benzyl oxidation with O2 visible light through synergistic action hot electrons and holes. Oxygen vacancies facilitate the trapping transfer to adsorbed O2, producing •O2–...
The efficient use of solar energy has received wide interest due to increasing and environmental concerns. A potential means in chemistry is sunlight-driven catalytic reactions. We report here on the direct harvesting visible-to-near-infrared light for chemical reactions by plasmonic Au-Pd nanostructures. intimate integration Au nanorods with Pd nanoparticles through seeded growth enabled Upon plasmon excitation, were induced accelerated both photocatalysis photothermal conversion. Under...
Plasmon-based photothermal therapy is one of the most intriguing applications noble metal nanostructures. The conversion efficiency an essential parameter in practically realizing this application. effects plasmon resonance wavelength, particle volume, shell coating, and assembly on efficiencies Au nanocrystals are systematically studied by directly measuring temperature nanocrystal solutions with a thermocouple analyzed basis energy balance. reaches maximum at ∼75 °C when wavelength equal...
Tailoring the longitudinal surface plasmon wavelengths (LSPWs), scattering, and absorption cross sections of gold nanorods has been demonstrated by combining anisotropic shortening transverse overgrowth judiciously choosing starting Au nanorods. Shortening yields with decreasing lengths but a fixed diameter, while produces increasing diameters nearly unchanged length. Two series LSPWs varying in same spectral range distinct extinction coefficients are thus obtained. The systematic changes...
The fixation of atmospheric N2 to NH3 is an essential process for sustaining life. One grand challenge develop efficient catalysts photofix under ambient conditions. Herein we report all-inorganic catalyst, Au nanocrystals anchored on ultrathin TiO2 nanosheets with oxygen vacancies. It can accomplish photodriven in the "working-in-tandem" pathway at room temperature and pressure. vacancies chemisorb activate molecules, which are subsequently reduced by hot electrons generated from plasmon...
Control over light absorption and emission using plasmonic nanostructures is an enabling technology, which can dramatically enhance the performances of existing optical optoelectronic devices, such as solar cells, light-emitting biosensors, high-resolution fluorescence microscopes. This Perspective takes example, illustrating how control nanoscale species. The origins intensity enhancements will be first discussed. Different parameters that largely affect interactions between fluorophore...
We report on the strong polarization dependence of plasmon-enhanced fluorescence single gold nanorods. The from organic fluorophores that are embedded in a mesostructured silica shell around individual nanorods is enhanced by longitudinal plasmon resonance Our electrostatic calculations show under an off-resonance excitation, electric field intensity contour nanorod rotates away length axis as excitation varied. ascribed to averaged enhancement within polarization. measured factor very good...
Elongated tetrahexahedral Au nanocrystals have been grown in high yields using a seed-mediated growth method. Morphological and structural characterizations show that these are single-crystalline enclosed by 24 high-index {037} facets. They more electrochemically active than octahedral 8 low-index {111} To date, there only few reports of metal exclusively facets, including trisoctahedral {122} facets Pt Our will be an important addition to the family also useful for fundamental catalytic...
Gold nanorods (NRs) have received much attention due to their size-dependent surface plasmon-related optical properties. A seed-mediated approach has recently been developed for the synthesis of Au NRs with varying length-to-diameter aspect ratios. With introduction silver ions in growth solution, narrow size distributions can be produced high yields. Herein we describe an continuous and selective shortening synthesized by ion-assisted method through oxidation environmentally benign oxygen...
The development of high-performance nanocatalysts relies essentially on the generation stable and active surface sites at atomic scale through synthetic control size, shape, chemical composition nanoscale metals metal oxides. One promising route is to induce exposure catalytically high-index facets nanostructures shape-controlled syntheses. We have designed prepared two types Pd nanoshells that are enclosed by {730} {221} heteroepitaxial growth high-index-faceted Au nanocrystals. turnover...
The emerging field of plasmonics with the capability to guide and localize light in nanoscale regime has enabled technologies that can efficiently harvest utilize solar energy for chemical processes. In this review, recent advances at intersection reactions are surveyed. origins plasmonic enhancements will be first discussed. applications localized plasmons various reactions, including photodecomposition organic pollutants, water splitting, synthesis, then summarized. We also discuss...
The order of gold: Ordered assemblies gold nanostructures are produced by droplet evaporation from single- and two-component systems. ordering the is highly dependent on shape size includes nanorods, nanocubes, polyhedra, bipyramids. two-photon-excited luminescence ordered nanorod larger than that disordered assemblies.