Please use this identifier to cite or link to this item:
|Title:||Extreme low thermal conductivity in nanoscale 3D Si phononic crystal with spherical pores|
|Citation:||Yang, L., Yang, N., Li, B. (2014-04-09). Extreme low thermal conductivity in nanoscale 3D Si phononic crystal with spherical pores. Nano Letters 14 (4) : 1734-1738. ScholarBank@NUS Repository. https://doi.org/10.1021/nl403750s|
|Abstract:||In this work, we propose a nanoscale three-dimensional (3D) Si phononic crystal (PnC) with spherical pores, which can reduce the thermal conductivity of bulk Si by a factor up to 10,000 times at room temperature. Thermal conductivity of Si PnCs depends on the porosity, for example, the thermal conductivity of Si PnCs with porosity 50% is 300 times smaller than that of bulk Si. The phonon participation ratio spectra demonstrate that more phonons are localized as the porosity increases. The thermal conductivity is insensitive to the temperature changes from room temperature to 1100 K. The extreme-low thermal conductivity could lead to a larger value of ZT than unity as the periodic structure affects very little the electric conductivity. © 2014 American Chemical Society.|
|Source Title:||Nano Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 21, 2019
WEB OF SCIENCETM
checked on Mar 13, 2019
checked on Jan 25, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.