Thermal transport in Si/Ge nanocomposites
文献类型：期刊论文
| 作者 | Huang, Xiaopeng1,2,3; Huai, Xiulan2; Liang, Shiqiang2; Wang, Xinwei1 |
| 刊名 | JOURNAL OF PHYSICS D-APPLIED PHYSICS
 |
| 出版日期 | 2009-05-07 |
| 卷号 | 42期号:9 |
| 英文摘要 | In this paper, a systematic study is carried out to investigate the thermal transport in Si/Ge nanocomposites by using molecular dynamics simulation. Emphasis is placed on the effect of nanowire size, heat flux, Si/Ge interface, atomic ratio and defects (voids). The results show that the thermal conductivity of nanowire composites is much lower than that of alloy, which accounts mainly for ZT enhancement and owes a great deal to the effect of interface thermal resistance. A 'reflecting effect' in temperature distribution is observed at the Si/Ge interface, which is largely due to the lack of right quantum temperature correction in the region adjacent to the interface. The thermal conductivity of the nanocomposite is found to have weak dependence on the bulk temperature (200-900 K) and the heat flux in the range (0.5-3.5) x 10(10) W m(-2). Simulation results reveal that for a constant Si wire dimension, the thermal conductivity of the Si(1-x)Ge(x) nanocomposites increases with x. Our study on the influence of the defects (voids) has the same order of relative thermal conductivity reduction with increasing void density in comparison with the experimental data. Due to the small size (10 nm) of Si nanowires in our nanocomposites, the voids show less effect on thermal conductivity reduction in comparison with the experimental data with 100 nm Si wires. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Applied |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | MOLECULAR-DYNAMICS SIMULATION ; HEAT-CONDUCTION ; THERMOELECTRIC-MATERIALS ; COMPUTER-SIMULATION ; SILICON FILMS ; QUANTUM-DOT ; SUPERLATTICES ; RESISTANCE ; INTERFACE ; DEVICES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000265531000057 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/106418]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Xiaopeng,Huai, Xiulan,Liang, Shiqiang,et al. Thermal transport in Si/Ge nanocomposites[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2009,42(9). |
| APA | Huang, Xiaopeng,Huai, Xiulan,Liang, Shiqiang,&Wang, Xinwei.(2009).Thermal transport in Si/Ge nanocomposites.JOURNAL OF PHYSICS D-APPLIED PHYSICS,42(9). |
| MLA | Huang, Xiaopeng,et al."Thermal transport in Si/Ge nanocomposites".JOURNAL OF PHYSICS D-APPLIED PHYSICS 42.9(2009). |
入库方式： OAI收割
来源：工程热物理研究所
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