A5100452460- 2D Materials and Applications
- MXene and MAX Phase Materials
- Electrocatalysts for Energy Conversion
- Graphene research and applications
- Advanced Photocatalysis Techniques
- Advanced Thermoelectric Materials and Devices
- Photonic Crystal and Fiber Optics
- Perovskite Materials and Applications
- Theoretical and Computational Physics
- Electronic and Structural Properties of Oxides
- Spectroscopy and Quantum Chemical Studies
- Molecular spectroscopy and chirality
- Quantum chaos and dynamical systems
- Topological Materials and Phenomena
- Thermal properties of materials
- ZnO doping and properties
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Surface Modification and Superhydrophobicity
- Semiconductor materials and interfaces
- Magnetic properties of thin films
Tsinghua University
2005-2020
Schottky effect of two-dimensional materials is important for nanoscale electrics. A ReSe2 flake transferred to be suspended between an Au sink and nanofilm. This device initially designed measure the transport properties flake. However, a rectification behavior observed in experiment from 273 340 K. The coefficient about 10. microstructure elements composition are systematically analyzed. film found contact with Si substrate scanning electron microscope image slant view 45°. ReSe2/Si Si/Au...
Abstract Developing controlled approaches for synthesizing high‐quality two‐dimensional (2D) semiconductors is essential their practical applications in novel electronics. The application of chemical vapor transport (CVT), an old single‐crystal growth technique, has been extended from growing 3D crystals to 2D atomic layers by tuning the kinetics. Both single crystalline individual flakes and continuous films 1 L MoS 2 were successfully obtained with CVT approach at low temperatures 300–600...
Two-dimensional (2D) PtSe2 shows the most prominent layer-dependent electrical properties among various 2D materials and high catalytic activity for hydrogen evolution reaction (HER), therefore, it is an ideal material exploring structure-activity correlations in systems. Here, starting with synthesis of single-crystalline a controlled number layers probing HER individual flakes micro electrochemical cells, we investigated from both theoretical experimental perspectives. We clearly...
Abstract Two‐dimensional (2D) PtSe 2 shows the most prominent layer‐dependent electrical properties among various 2D materials and high catalytic activity for hydrogen evolution reaction (HER), therefore, it is an ideal material exploring structure–activity correlations in systems. Here, starting with synthesis of single‐crystalline a controlled number layers probing HER individual flakes micro electrochemical cells, we investigated from both theoretical experimental perspectives. We clearly...
Abstract Two‐dimensional (2D) anisotropic rhenium diselenide (ReSe 2 ) has attracted lots of attention due to its promising applications in electronics and optoelectronics. However, controlled synthesis high quality ultrathin ReSe remains as a challenge. Here we developed an approach for synthesizing 2D flakes with thickness down monolayer by chemical vapor transport (CVT) through carefully tuning the growth kinetics. The atomic structures anisotropy obtained were intensively characterized...
2D MoS2 has emerged as a promising alternative to Pt-based catalysts for hydrogen evolution reaction (HER) due its low cost and earth abundance. However, insufficient active sites of basal plane poor conductivity become the foremost factors restricting catalytic performance . Here, facile strategy is presented enhance HER by converting structure into 1D/2D heterostructures Mo6 Te6 /MoS2(1-x) Te2x in situ tellurization. As-prepared exhibit excellent with Tafel slope ≈56 mV dec-1 (only...
Abstract Developing controlled approaches for synthesizing high‐quality two‐dimensional (2D) semiconductors is essential their practical applications in novel electronics. The application of chemical vapor transport (CVT), an old single‐crystal growth technique, has been extended from growing 3D crystals to 2D atomic layers by tuning the kinetics. Both single crystalline individual flakes and continuous films 1 L MoS 2 were successfully obtained with CVT approach at low temperatures 300–600...
Inhomogeneous loss generated by multimode laser linewidth broadening in an optical fiber is experimentally studied. With this mechanism, multiwavelength lasing achieved use of either Raman gain or erbium-doped gain. Through various pump powers and filter bandwidths, the relationship between inhomogeneous performance a studied, physical explanation provided.
It is highly desired to efficiently probe the cross-plane thermal conductivities of two-dimensional (2D) flakes with a considerably small temperature increase, avoiding difficulty suspending atomically thin samples. A thermometry platform was proposed for measuring conductivity irregular dielectric and semiconductor 2D on substrate. Two metal heaters identical configurations were fabricated same chip, one deposited sample other directly substrate as reference. The value could be derived by...
We have obtained the geometric phase of tripartite spin-1/2 system with spin-spin coupling and discussed influence this on phase. discovered coupling-independent explained it. Based work, we propose concept quasimagnetic field assimilate into parameter space. By theory, relation between solid angle in space still holds for a if is properly revised way elucidated.