Analytical insights into thermophysical properties of nanomaterials

被引：0
作者：
Chou, Rone-Hwa [1 ]
Pan, Ci-Ling [2 ]
机构：
[1] Wintek Corp, Inovat Technol Ctr, Taichung 42760, Taiwan
[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan
来源：
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS | 2014年 / 65卷 / 01期
关键词：
DISCRETE-ORDINATE METHOD; PHONON HEAT-TRANSPORT; THERMAL-CONDUCTIVITY; RADIATIVE-TRANSFER; SILICON LAYERS; THIN-FILMS; SCATTERING; MEDIA;
D O I：
10.1051/epjap/2013130031
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Using the discrete ordinate method, we solve the equations of phonon radiative transfer for thin films analytically, and deduce closed-form expressions for three thermophysical properties including the phonon intensity, heat flux density and effective phonon thermal conductivity. These analytical expressions provide a fast and convenient way to analyze heat conduction behavior in thin films, and thus allowing us to comprehend how the film thickness and bulk phonon mean free path affects the thermophysical properties. Also we extend these expressions from thin films to one period of superlattices, and demonstrate that adjusting the thickness ratio of two layers can control its effective phonon thermal conductivity.
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页数：11
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