A5073712565- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Thermal properties of materials
- Quantum Dots Synthesis And Properties
- Thermal Radiation and Cooling Technologies
- Advancements in Battery Materials
- MXene and MAX Phase Materials
- Supercapacitor Materials and Fabrication
- Nanowire Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- 2D Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Battery Materials and Technologies
- Advanced Photocatalysis Techniques
- Graphene research and applications
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Copper-based nanomaterials and applications
- Carbon Nanotubes in Composites
- Catalytic Processes in Materials Science
- High Entropy Alloys Studies
- Advanced materials and composites
- Metallurgy and Material Forming
Fudan University
2024-2025
Yiwu Science and Technology Research Institute
2024-2025
Iowa State University
2015-2024
Northwest University
2024
Bissell (United States)
2023-2024
Donghua University
2005-2023
Zhejiang Sci-Tech University
2022-2023
Beijing University of Technology
2023
Sichuan University
2023
Anhui University
2021-2023
Single-crystal silicon nanowires with diameters approaching molecular dimensions were synthesized using gold nanocluster-catalyzed 1D growth. High-resolution transmission electron microscopy studies show that grown silane reactant in hydrogen are single crystal little or no visible amorphous oxide down to as small 3 nm. Structural characterization of a large number samples shows the smallest-diameter grow primarily along 〈110〉 direction, whereas larger 〈111〉 direction. In addition,...
We present the rational synthesis of colloidal copper(I) sulfide nanocrystals and demonstrate their application as an active light absorbing component in combination with CdS nanorods to make a solution-processed solar cell 1.6% power conversion efficiency on both conventional glass substrates flexible plastic stability over 4 month testing period.
Two-dimensional electron and hole gas systems, enabled through band structure design epitaxial growth on planar substrates, have served as key platforms for fundamental condensed matter research high-performance devices. The analogous development of one-dimensional (1D) or systems controlled 1D nanostructure which could open up opportunities beyond existing carbon nanotube nanowire has not been realized. Here, we report the synthesis transport studies a system based free-standing...
We report solar cells based on highly confined nanocrystals of the ternary compound PbSxSe1-x. Crystalline, monodisperse alloyed are obtained using a one-pot, hot injection reaction. Rutherford back scattering and energy-filtered transmission electron microscopy suggest that S Se anions uniformly distributed in alloy nanoparticles. Photovoltaic devices made nanoparticles more efficient than either pure PbS or PbSe nanocrystal devices.
Single-source molecular precursors were used to synthesize II-VI compound semiconductor nanowires for the first time. Cadmium sulfide and zinc prepared using cadmium diethyldithiocarbamate, Cd(S2CNEt2)2, Zn(S2CNEt2)2, respectively, as in a gold nanocluster-catalyzed vapor-liquid-solid growth process. High-resolution transmission electron microscopy studies show that CdS ZnS are single-crystal wurtzite structures with stoichiometric compositions. In addition, photoluminescence measurements...
We report the rational synthesis of dopant-free GaN/AlN/AlGaN radial nanowire heterostructures and their implementation as high electron mobility transistors (HEMTs). The were prepared by sequential shell growth immediately following elongation using metal−organic chemical vapor deposition (MOCVD). Transmission microscopy (TEM) studies reveal that are dislocation-free single crystals. In addition, thicknesses compositions individual AlN AlGaN shells unambiguously identified cross-sectional...
A rational yet scalable solution phase method has been established, for the first time, to obtain n-type Bi2Te3 ultrathin nanowires with an average diameter of 8 nm in high yield (up 93%). Thermoelectric properties bulk pellets fabricated by compressing nanowire powder through spark plasma sintering have investigated. Compared current commercial Bi2Te3-based materials, our devices exhibit enhanced ZT 0.96 peaked at 380 K due a significant reduction thermal conductivity derived from phonon...
Stable Na+ ion storage cathodes with adequate reversible capacity are now greatly needed for enabling Na-ion battery technology large scale and low cost electric applications. In light of the superior Li+ performance layered oxides, pure P2-phase Na0.67[Mn0.65Ni0.15Co0.2]O2 microflakes synthesized by a simple sol–gel method tested as cathode. These exhibit considerably high 141 mA h g−1 slow decay to 125 after 50 cycles, showing much better cyclability than previous NaMnO2 compounds. To...
Abstract Supported nanoparticles are broadly employed in industrial catalytic processes, where the active sites can be tuned by metal-support interactions (MSIs). Although it is well accepted that supports modify chemistry of metal nanoparticles, systematic utilization MSIs for achieving desired performance still challenging. The developments with appropriate chemical properties and identification resulting main barriers. Here, we develop two-dimensional transition carbides (MXenes)...
Improving energy/fuel efficiency by converting waste heat into electricity using thermoelectric materials is of great interest due to its simplicity and reliability. However, many are composed either toxic or scarce elements. Here, we report the experimental realization nontoxic abundant copper zinc tin sulfide (CZTS) nanocrystals for potential applications. The CZTS can be synthesized in large quantities from solution phase reaction compressed robust bulk pellets through spark plasma...
Abstract Patterning of high-quality two-dimensional chalcogenide crystals with unique planar structures and various fascinating electronic properties offers great potential for batch fabrication integration optoelectronic devices. However, it remains a challenge that requires accurate control the crystallization, thickness, position, orientation layout. Here we develop method combines microintaglio printing van der Waals epitaxy to efficiently pattern single-crystal chalcogenides onto...
The design of efficient catalysts capable delivering high currents at low overpotentials for hydrogen evolution reactions (HERs) is urgently needed to use in practical applications. Herein, we report platinum (Pt) alloyed with titanium (Ti) from the surface Ti3C2Tx MXenes form Pt3Ti intermetallic compound (IMC) nanoparticles (NPs) via situ coreduction. In X-ray absorption spectroscopy (XAS) indicates that Pt undergoes a temperature-dependent transformation single atoms compounds, and...
Abstract High-entropy ceramics attract more and attention in recent years. However, mechanical properties especially strength fracture toughness for high-entropy their composites have not been comprehensively reported. In this work, (Ti 0.2 Zr Hf Nb Ta )B 2 (HEB) monolithic its composite containing 20 vol% SiC (HEB–20SiC) are prepared by hot pressing. The addition of only accelerates the densification process but also refines microstructure HEB, resulting improved properties. obtained dense...
FeS2 pyrite nanocrystals with high purity have been synthesized through a surfactant-assisted hydrothermal reaction under optimum pH value. These represent new group of well-defined nanoscale structures for high-performance photovoltaic solar cells based on nontoxic and earth abundant materials.
Supported multimetallic nanoparticles (NPs) are widely used in industrial catalytic processes, where the relation between surface structure and function is well-known. However, effect of subsurface layers on such catalysts remains mostly unstudied. Here, we demonstrate a clear supported 2 nm core–shell NPs with atomically precise high temperature stable Pt3Mn intermetallic measured by situ synchrotron X-ray Diffraction, difference Absorption Spectroscopy, Energy Dispersive Spectroscopy. The...