| 研究実績の概要 |
Quasi-Casimir heat transfer, a new heat transfer mode in the transition regime from heat conduction to thermal radiation, results in the interfacial thermal resonance between two objects. However, the quasi-Casimir coupling between the nanostructures and adsorbed water layers on the solid surfaces is still open for question. Therefore, using nonequilibrium molecular dynamics, we will verify phonon transmission across a nanogap via nanostructures and adsorbed water layers, focusing on quasi-Casimir coupling and thermal resonance.
In the FY 2022, we performed molecular dynamics simulation using the package program LAMMPS. In the nanogap of Pt adsorbed with water molecules, thermal resonance phenomena and phonon transport at the interface were confirmed not only between solid molecules but also between liquid molecules. In a nonequilibrium state, the heat flux across the nanogap increases exponentially with decreasing gap distance, and the thermal resonance between the atoms of the liquid adsorption layers co-occurs with the thermal resonance between the atoms of the solid interface layers. Moreover, the effects of the SiC molecular termination atoms (Si-C, C-Si, Si-Si, and C-C) on the thermal resonance phenomena and phonon transport in the SiC nanogap were clarified.
These results have been presented at the 2022 Thermal Engineering Conference and published in Physical Chemistry Chemical Physics and Nanoscale by the Royal Society of Chemistry.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
In the FY 2022, we performed molecular dynamics simulation using the package program LAMMPS. We confirmed thermal resonance phenomena and phonon transport at the interface not only between solid molecules but also between liquid molecules in the nanogap of Pt adsorbed with water molecules. In a nonequilibrium state, the heat flux across the nanogap increases exponentially with decreasing gap distance, and the thermal resonance between the atoms of the liquid adsorption layers co-occurs with the thermal resonance between the atoms of the solid interface layers. Moreover, the effects of the SiC molecular termination atoms (Si-C, C-Si, Si-Si, and C-C) on the thermal resonance phenomena and phonon transport in the SiC nanogap were clarified. These results have been presented at the 2022 Thermal Engineering Conference and published in Physical Chemistry Chemical Physics and Nanoscale by the Royal Society of Chemistry.
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