Size- and coherence-dependent thermodynamic properties of metallic nanowires and nanofilms

摘要

A model is developed to account for the size- and coherence-dependent cohesive energy, melting temperature, melting enthalpy, vacancy formation energy and vacancy concentration of nanowires and nanofilms. It is found that the variation direction (increasing or decreasing) of the thermodynamic properties is determined by the coherent interface, and the quantity of variation depends on the crystal size. The calculated results on Pb nanowires and nanofilms are consistent with the available experimental values.