Effect of the amorphization around spherical nano-pores on the thermal conductivity of nano-porous Silicon

Eurotherm Seminar No 108 - Nanoscale and Microscale Heat Transfer V

Verdier, Maxime^1 ; Lacroix, David^1 ; Termentzidis, Konstantinos^1

Université de Lorraine, LEMTA, CNRS-UMR7563, BP 70239, Vandœuvre Cedex

54506, France^1

关键词: Crystalline silicons;    Molecular dynamics simulations;    Nano-porous silicon;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/785/1/012009/pdf
DOI  :  10.1088/1742-6596/785/1/012009

来源: IOP

【 摘 要 】

The thermal conductivity of nano-porous Silicon with amorphous shells around the pores is computed by Molecular Dynamics simulations. For the latter property, a systematic investigation of the porosity and the thickness of the amorphous shells has been performed. Sub-amorphous thermal conductivity is reached for systems with large porosity and amorphous shell, while a non-negligible fraction of crystalline Silicon phase is still present. The thermal conductivity of all studied systems can be controlled by a key parameter which is the ratio of crystalline/amorphous or crystalline/void interface to the volume of material.