Impact of isotopic disorders on thermal transport properties of nanotubes and nanowires | |
Sun, Tao ; Kang, Wei ; Wang, Jianxiang | |
刊名 | 应用物理杂志
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2015 | |
关键词 | SILICON NANOWIRES CONDUCTIVITY SCATTERING DYNAMICS LATTICES IMPERFECTIONS TEMPERATURE NANOSCALE INTERFACE GRAPHENE |
DOI | 10.1063/1.4906138 |
英文摘要 | We present a one-dimensional lattice model to describe thermal transport in isotopically doped nanotubes and nanowires. The thermal conductivities thus predicted, as a function of isotopic concentration, agree well with recent experiments and other simulations. Our results display that for any given concentration of isotopic atoms in a lattice without sharp atomic interfaces, the maximum thermal conductivity is attained when isotopic atoms are placed regularly with an equal space, whereas the minimum is achieved when they are randomly inserted with a uniform distribution. Non-uniformity of disorder can further tune the thermal conductivity between the two values. Moreover, the dependence of the thermal conductivity on the nanoscale feature size becomes weak at low temperature when disorder exists. In addition, when self-consistent thermal reservoirs are included to describe diffusive nanomaterials, the thermal conductivities predicted by our model are in line with the results of macroscopic theories with an interfacial effect. Our results suggest that the disorder provides an additional freedom to tune the thermal properties of nanomaterials in many technological applications including nanoelectronics, solid-state lighting, energy conservation, and conversion. (C) 2015 AIP Publishing LLC.; Physics, Applied; SCI(E); EI; 0; ARTICLE; jxwang@pku.edu.cn; 3; 117 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/154083] ![]() |
专题 | 工学院 |
推荐引用方式 GB/T 7714 | Sun, Tao,Kang, Wei,Wang, Jianxiang. Impact of isotopic disorders on thermal transport properties of nanotubes and nanowires[J]. 应用物理杂志,2015. |
APA | Sun, Tao,Kang, Wei,&Wang, Jianxiang.(2015).Impact of isotopic disorders on thermal transport properties of nanotubes and nanowires.应用物理杂志. |
MLA | Sun, Tao,et al."Impact of isotopic disorders on thermal transport properties of nanotubes and nanowires".应用物理杂志 (2015). |
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