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Pore-size dependence of the thermal conductivity of porous silicon : a phonon hydrodynamic approach
Àlvarez Calafell, Francesc Xavier (Universitat Autònoma de Barcelona. Departament de Física)
Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física)
Sellitto, A. (University of Basilicata. Department of Mathematics and Computer Science)
American Physical Society

Fecha: 2010
Resumen: Phononhydrodynamics is used to analyze the influence of porosity and of pore size on reduction in thermal conductivity in porous silicon, with respect to crystalline silicon. The expressions predict that the thermal conductivity is lower for higher porosity and for smaller pore radius, as a consequence of phononballisticeffects. The theoretical results describe experimental data better than the assumption that they only depend on porosity.
Derechos: Tots els drets reservats.
Lengua: Anglès
Documento: Article ; recerca ; Versió publicada
Materia: Thermal conductivity ; Phonons ; Hydrodynamics ; Silicon ; Boltzmann equations ; Ballistic transport ; Boundary value problems ; Heat transport
Publicado en: Applied physics letters, Vol. 97, Issue 3 (July 2010) , p. 33103, ISSN 1077-3118

DOI: 10.1063/1.3462936


4 p, 256.1 KB

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