金属纳米微粒热力学性能的形状效应

金属纳米微粒的热力学性能不仅依赖于纳米微粒的尺寸,还依赖于纳米微粒的形状.介绍了作者建立的描述纳米微粒形状效应的理论模型,该模型能够预测微粒形状对其结合能、熔解温度、过热、熔解熵、熔解焓、空位形成能、空位浓度以及纳米微粒相图的影响.该模型的预测结果和已有的实验数据一致.

Shape Effect on the Thermodynamic Properties of Metallic Nanoparticles

The thermodynamic properties of metallic nanoparticles not only depend on the particle size, but also depend on the particle shape. The shape effect model of metallic nanoparticles, developed by the author, is introduced in this paper. The model can predict the shape dependent cohesive energy, melting temperature, superheating, melting entropy, melting enthalpy, vacancy formation energy, vacancy concentration and phase diagram of nanoparticles. The present predictions agree with the corresponding experimental results.