Nonmonotonic Diameter Dependence of Thermal Conductivity of Extremely Thin Si Nanowires: Competition between Hydrodynamic Phonon Flow and Boundary Scattering.
Sign Up to like & getrecommendations! Published in 2017 at "Nano letters"
DOI: 10.1021/acs.nanolett.6b05113
Abstract: By carefully and systematically performing Green-Kubo equilibrium molecular dynamics simulations, we report that the thermal conductivity (κ) of Si nanowires (NWs) does not diverge but converges and increases steeply when NW diameter (D) becomes extremely… read more here.
Keywords: hydrodynamic phonon; phonon; phonon flow; boundary scattering ... See more keywords
Grain boundary scattering effects on mobilities in p-type polycrystalline SnSe
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Materials Chemistry C"
DOI: 10.1039/c7tc03022c
Abstract: The extremely high ZTs of p-type SnSe single crystals have attracted much attention. However, due to the high cost of preparation, SnSe single crystals are difficult to be commercialized. On the other hand, the biggest… read more here.
Keywords: grain boundary; single crystals; boundary scattering; polycrystalline snse ... See more keywords
Maximizing and minimizing the boundary scattering mean free path in diameter-modulated coaxial cylindrical nanowires
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DOI: 10.1063/5.0056308
Abstract: The thermal conductivity ( k) of semiconducting nanomaterials is influenced by the geometry-dependent phonon boundary scattering mean free path ( Λ Bdy). Although prior work has calculated Λ Bdy of periodically corrugated rectangular nanowires and… read more here.
Keywords: cylindrical nanowires; coaxial cylindrical; scattering mean; geometry ... See more keywords
Thermal Transport and Rectification Properties of Bamboo-Like SiC Polytypes Nanowires
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Nanomaterials"
DOI: 10.1155/2017/5038978
Abstract: Bamboo-like SiC nanowires (NWs) have specific geometric shapes, which have the potential to suppress thermal conductivity by phonon boundary scattering. In this work, phonon transport behaviors in the 3C-SiC, 4H-SiC, and 6H-SiC crystal lattices are… read more here.
Keywords: sic polytypes; bamboo like; transport; phonon ... See more keywords