Molecular Dynamics Simulation of Thermal Conductivity in Si--Ge Nanocomposites

Thermal conductivity of nanocomposites is calculated by molecular dynamics （MD） simulation. The effect of size on thermal conductivity of nanowire composites and the temperature profiles are studied. The results indicate that the thermal conductivity of nanowire composites could be much lower than alloy value; the thermal conductivity is slightly dependent on temperature except at very low temperature.     

铂薄膜导热特性的分子动力学模拟

采用非平衡态分子动力学(NEMD)方法模拟分析了纳米铂(Pt)薄膜的导热性能与脉冲激光作用下的温度响应特性.结果表明,100～500 nm铂薄膜的法向导热系数比体材料值低很多,而且低于其面向导热系数;微米铂薄膜的温度响应时间在纳秒量级;在脉冲加热的初始阶段,有一快速非傅立叶热波沿铂薄膜的厚度方向传递.