Please use this identifier to cite or link to this item:
https://doi.org/10.1021/nl300208c
Title: | Impacts of atomistic coating on thermal conductivity of germanium nanowires | Authors: | Chen, J. Zhang, G. Li, B. |
Keywords: | atomistic coating germanium nanowires molecular dynamics simulations Thermal conductivity |
Issue Date: | 13-Jun-2012 | Citation: | Chen, J., Zhang, G., Li, B. (2012-06-13). Impacts of atomistic coating on thermal conductivity of germanium nanowires. Nano Letters 12 (6) : 2826-2832. ScholarBank@NUS Repository. https://doi.org/10.1021/nl300208c | Abstract: | By using nonequilibrium molecular dynamics simulations, we demonstrated that thermal conductivity of germanium nanowires can be reduced more than 25% at room temperature by atomistic coating. There is a critical coating thickness beyond which thermal conductivity of the coated nanowire is larger than that of the host nanowire. The diameter-dependent critical coating thickness and minimum thermal conductivity are explored. Moreover, we found that interface roughness can induce further reduction of thermal conductivity in coated nanowires. From the vibrational eigenmode analysis, it is found that coating induces localization for low-frequency phonons, while interface roughness localizes the high-frequency phonons. Our results provide an available approach to tune thermal conductivity of nanowires by atomic layer coating. © 2012 American Chemical Society. | Source Title: | Nano Letters | URI: | http://scholarbank.nus.edu.sg/handle/10635/96877 | ISSN: | 15306984 | DOI: | 10.1021/nl300208c |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.