A5036944332- Thermal properties of materials
- Advanced Thermoelectric Materials and Devices
- Thermal Radiation and Cooling Technologies
- Graphene research and applications
- Solar-Powered Water Purification Methods
- Solar Thermal and Photovoltaic Systems
- Carbon Nanotubes in Composites
- Membrane Separation Technologies
- Advanced Sensor and Energy Harvesting Materials
- Heat Transfer and Optimization
- Solar Radiation and Photovoltaics
- Hydrogels: synthesis, properties, applications
- Nanopore and Nanochannel Transport Studies
- 2D Materials and Applications
- Thermography and Photoacoustic Techniques
- Advancements in Semiconductor Devices and Circuit Design
- Nanofluid Flow and Heat Transfer
- Machine Learning in Materials Science
- Dielectric materials and actuators
- Nanowire Synthesis and Applications
- Ferroelectric and Piezoelectric Materials
- Advanced Thermodynamics and Statistical Mechanics
- Thermoelastic and Magnetoelastic Phenomena
- Phase Change Materials Research
- Electronic Packaging and Soldering Technologies
National University of Defense Technology
2024-2025
Huazhong University of Science and Technology
2015-2024
Yunnan University
2024
Chongqing Normal University
2024
Hohai University
2024
Northeast Normal University
2022
State Key Laboratory of Coal Combustion
2020
Nanjing Normal University
2019
Central South University
2019
Nanchang University
2019
In this paper, heat flux in graphene nanoribbons has been studied by using molecular dynamics simulations. It is found that the runs preferentially along direction of decreasing width, which demonstrates significant thermal rectification effect asymmetric ribbons. The dependence ratio on vertex angle and length are also discussed. Compared to carbon nanotube based one-dimensional rectifier, have much higher even large scale. Our results demonstrate ribbon might be a promising structure for...
With molecular dynamics simulations, we demonstrate very obvious thermal rectification in large temperature range from 200 to 400 K nanocone. We also observe that the of nanocone does not depend on length sensitively, which is stark contrast with nanotube rectifier decreases dramatically as increases. Our work demonstrates carbon a promising practical phononic device.
We study thermal properties of one dimensional(1D) harmonic and anharmonic lattices with mass gradient. It is found that the temperature gradient can be built up in 1D lattice due to existence gradons. The heat flow asymmetric Moreover, a certain region {\it negative differential resistance} observed. Possible applications constructing rectifier transistor by using graded material are discussed.
The thermal conductivity of silicon nanowires (SiNWs) is investigated by molecular dynamics (MD) simulation. It found that the SiNWs can be reduced exponentially isotopic defects at room temperature. reaches minimum, which about 27% pure 28Si NW, when doped with 50% isotope atoms. isotopic-superlattice structured depends clearly on period superlattice. At a critical 1.09 nm, only 25% value Si NW. An anomalous enhancement observed superlattice smaller than this length. ultralow explained...
This review summarizes recent studies of thermal transport in nanoscaled semiconductors. Different from bulk materials, new physics and novel properties arise low dimensional nanostructures, such as the abnormal heat conduction, size dependence conductivity, phonon boundary/edge scatterings. It is also demonstrated that phonons super-diffusively structures, other words, Fourier's law not applicable. Based on manipulating phonons, we discuss envisioned applications nanostructures a broad...
We study the non-Fourier heat conductions in nanomaterials based on thermomass theory. For transient conduction a one-dimensional nanomaterial with low-temperature step at both ends, temperature response predicted by present model is consistent those existing theoretical models for small steps. However, if large, unphysical distribution under zero other models, when two cooling waves meet, does not appear predictions model. The steady-state equation derived has been applied to predict...
In this work, we propose a nanoscale three-dimensional (3D) Si phononic crystal (PnC) with spherical pores, which can reduce the thermal conductivity of bulk by factor up to 10,000 times at room temperature. Thermal PnCs depends on porosity, for example, porosity 50% is 300 smaller than that Si. The phonon participation ratio spectra demonstrate more phonons are localized as increases. insensitive temperature changes from 1100 K. extreme-low could lead larger value ZT unity periodic...
Wave effects of phonons can give rise to controllability heat conduction in nanostructures beyond that by particle scattering at surfaces and interfaces. In this paper, we propose a new class three-dimensional nanostructures: silicon-nanowire-cage (SiNWC) structure consisting silicon nanowires (SiNWs) connected nano-cross-junctions. We perform equilibrium molecular dynamics simulations find an ultralow value thermal conductivity SiNWC,...
Both electron and phonon transport properties of single layer MoS2 (SLMoS2) are studied. Based on first-principles calculations, the electrical conductivity SLMoS2 is calculated by Boltzmann equations. The thermal to be as high 116.8 Wm-1K-1 molecular dynamics (MD) simulations. predicted value ZT 0.26 at 500K. As could reduced largely engineering, there should a possibility enhance in SLMoS2-based materials.