A5067964929- Graphene research and applications
- Carbon Nanotubes in Composites
- Thermal properties of materials
- 2D Materials and Applications
- Mechanical and Optical Resonators
- Advanced Chemical Physics Studies
- Magnetic properties of thin films
- Thermal Radiation and Cooling Technologies
- Boron and Carbon Nanomaterials Research
- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Nanowire Synthesis and Applications
- Solar Radiation and Photovoltaics
- Electrocatalysts for Energy Conversion
- Solar Thermal and Photovoltaic Systems
- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Heat Transfer and Boiling Studies
- Mechanical Failure Analysis and Simulation
- Nanoporous metals and alloys
- Fusion materials and technologies
- Nanopore and Nanochannel Transport Studies
- Topological Materials and Phenomena
- Advanced Thermoelectric Materials and Devices
- Photovoltaic System Optimization Techniques
Hunan University
2022-2025
The University of Tokyo
2012-2025
Dalian University of Technology
2018-2025
Ministry of Energy
2025
Ocean Energy (Norway)
2025
Dalian Ocean University
2023
Central South University
2022
National Institute of Advanced Industrial Science and Technology
2021
Fudan University
2018
Institute of Modern Physics
2018
Local-density-functional calculations are used to study the change of work functions induced by a layer adsorbates. We investigated and compared function monolayer Mo, Ag, Au, Fe, Co, Ni, Nb, Li, N, O on W(100), W(110), W(211), W(111) surfaces. While many systems obey commonly accepted rule that electronegative adsorbates increase surface, we find some exceptions. For example, overlayers Ni W(111), but decrease W(110) although charge transfer is same in all orientations. found even oxygen...
Most of the current methods for synthesis two-dimensional materials (2DMs) require temperatures not compatible with traditional back-end-of-line (BEOL) processes in semiconductor industry (450 °C). Here, we report a general BiOCl-assisted chemical vapor deposition (CVD) approach low-temperature 27 ultrathin 2DMs. In particular, by mixing BiOCl selected metal powders to produce volatile intermediates, show that 2DMs can be produced at 280-500 °C, which are ~200-300 °C lower than required...
The synthesis of one-dimensional van der Waals heterostructures was realized recently, which offers alternative possibilities for prospective applications in electronics and optoelectronics. even reduced dimension will enable different properties further miniaturization beyond the capabilities their two-dimensional counterparts. natural doping results p-type electrical characteristics semiconducting single-walled carbon nanotubes n-type molybdenum disulfide with conventional noble metal...
2D materials with mixed crystal phase will lead to the nonuniformity of performance and go against practical application. Therefore, it is great significance develop a valid method synthesize typical stoichiometry. Here, palladium sulfides centimeter scale uniform stoichiometric ratio are synthesized via controlling sulfurization temperature thin films. The relationship between products investigated in depth. Besides, high-quality PdS2 films at 450-550 °C, which would be compatible...
Single-walled carbon nanotube (SWCNT) films exhibit exceptional optical and electrical properties, making them highly promising for scalable integrated devices. Previously, we employed SWCNT as templates the chemical vapor deposition (CVD) synthesis of one-dimensional heterostructure where boron nitride nanotubes (BNNTs) molybdenum disulfide (MoS2NTs) were coaxially nested over networks. In this work, have further refined method to achieve precise control BNNT coating in SWCNT@BNNT films....
Abstract The exchange bias (EB) effect is a fundamental magnetic phenomenon, in which the field/coercive field ratio (|H EB /H C |) can improve stability of spintronic devices. Two‐dimensional (2D) heterostructures have potential to construct low‐power and high‐density devices, while their typically air unstable |H | lesser, limiting possibility applications. Here, 2D Cr 5 Te 6 nanosheets been systematically synthesized with an situ formed ≈2 nm‐thick doped 2 O 3 layer (Te‐Cr ) on upper...
Abstract Spin‐orbit torque (SOT) magnetic memory technology has garnered significant attention due to its ability enable field‐free switching of magnets with strong perpendicular anisotropy (PMA). However, concerns regarding power consumption SOT‐memory are persisting. Here, this work proposes a method construct tunnel junction (MTJ) by transferring chemically vapor‐deposited two‐dimensional (2D) Cr 3 Te 4 /WS 2 van der Waals (vdW) heterostructures onto 2D Fe GeTe (FGT) magnet. The...
Carbyne, a one-dimensional (1D) carbon allotrope with alternating triple and single bonds, has the highest known mechanical strength but is unstable to bending, limiting its synthesis short linear chains. Encapsulation within nanotubes (CNTs) stabilizes carbyne, forming confined carbyne (CC), thus enabling further research concerning attractive 1D physics materials properties of carbyne. While CC been synthesized in multi-walled CNTs using arc-discharge method double-walled via...
Compared with isolated single-walled carbon nanotubes (SWNTs), thermal conductivity is greatly impeded in SWNT bundles; however, the measurement of bundle size effect difficult. In this study, number SWNTs a was determined based on transferred horizontally aligned suspended micro-thermometer to quantitatively study conductivity. Increasing significantly degraded For SWNTs, approximately 5000 ± 1000 W m–1 K–1 at room temperature, three times larger than that four-SWNT bundle. The...
We report optical properties of the smallest single-walled carbon nanotubes (SWNTs) with a diameter only 3 A. These ultrasmall SWNTs are fabricated in elliptical nanochannels an AlPO-11 (AEL) single crystal. Polarized and resonant Raman scattering unambiguously revealed that these 0.3 nm (2,2) armchair symmetry. Interestingly, tube has two metastable ground states corresponding to slightly different lattice constants axial direction: one state is metallic other semiconducting.
Two-dimensional materials and their heterojunctions have received extensive attention in fundamental applied research of photonics, electronics, spintronics. Herein, we stacked SnS2, FePS3, graphene (Gr) nanosheets into SnS2/FePS3/Gr van der Waals heterojunction, which exhibits broadband photoresponse from an ultraviolet region (405 nm) to infrared (850 atmosphere at room temperature. It was found that the dominated carrier SnS2/FePS3 hererojunction different electrical transport. The...
Laterally resolved measurements of the quantum size effect (QSE) in electron reflectivity are made with low energy microscopy on coherently strained Ag films a W(110) surface. The evolution total film thickness increasing number atomic layers is determined accurately by dynamical theory analysis QSE features. Combined model layer spacings obtained from first-principles calculations, this provides for novel approach to determine buried interface spacing, which inaccessible other methods.
Surface energies of Au(100) $p(1\ifmmode\times\else\texttimes\fi{}1)$ and Au(100)-hex as modeled by a $p(1\ifmmode\times\else\texttimes\fi{}5)$ unit cell have been calculated function surface charge the density functional method. When is neutral, energy lower than that Au(100), consistent with experimental observation has hexagonal, instead square top layer. Calculations show both systems increase when surfaces are positively charged there crossover increasing so Au(100)-square becomes...
Molecular dynamics simulations are performed to evaluate the effect of van der Waals forces among single-wall carbon nanotubes (SWNTs) on interfacial thermal conductance between a SWNT array and silicon substrate. First, samples SWNTs vertically aligned substrate simulated, where both number arrangement varied. Results reveal that array/Si with present is higher than when they absent. To better understand how affect heat transfer through interface silicon, further constructs one surrounded...
The influence of chirality on the thermal conductivity single-walled carbon nanotubes (SWNTs) is discussed in this paper, using a non-equilibrium molecular dynamics (NEMD) method. tube lengths SWNTs studied here are 20, 50, and 100 nm, respectively, at each length relationship between chiral angle SWNT revealed. We find that if relatively short, more obvious with larger has greater conductivity. Moreover, zigzag smaller than an armchair one. As becomes longer, increases while decreases.
The thermal transport properties of random network, single-walled carbon nanotube (SWNT) films were assessed using Raman spectroscopy. Two types SWNT investigated: single-layer and stacked. fabricated by aerosol chemical vapour deposition subsequent direct dry deposition, while the stacked prepared placing on top one another. anisotropy network structures each these was evaluated based angular dependence optical absorbance spectra. results show that decreases with increasing film thickness...
A useful and rapid method of measuring the in-plane sheet thermal conductance single-walled carbon nanotube (SWNT) thin films by steady-state infrared thermography is proposed in this study. The SWNT are suspended between free ends two cantilevered silicon plates, anchored kept at different but constant temperatures to achieve heat transport through silicon–SWNT–silicon bridge vacuum. temperature gradient along captured with an camera. plate known conductivity serves as a reference for...
Zeolite-supported carbon nanotube (CNT) synthesis provides a route for its mass production due to the porous surfaces accommodating large number of catalytic particles and maintaining fine particle sizes during high-temperature growth. Coaxial single-walled nanotubes (SWCNTs) boron nitride (BNNT) van der Waals heterostructures have been produced recently on CNT thin-film template. To achieve high yield one-dimensional heterostructure, BNNT-wrapped SWCNTs were synthesized zeolite support...
The interaction of Pd with the Mo(100) surface has been studied low-energy electron microscopy and diffraction, first-principles total-energy calculations. Deposition at elevated temperature leads initially to development an intense $c(2\ifmmode\times\else\texttimes\fi{}2)$ diffraction pattern. Theoretical calculations demonstrate that a substitutional alloy is energetically favored compared overlayer structure half monolayer coverage. creation large number islands upon deposition consistent...