基于原子尺度的fcc金属纳米线材杨氏模量分析

simple atomic-scale model based on the distortion of the unit cell generating the nanowire is proposed to predict the elastic characteristics of fcc metal nanowires. It allows for an analytical study on the mechanical behavior of nanomaterials from the perspective of atomic interactions. Bond-strength enhancing arising from the spontaneous bond relaxation has particularly strong effects on the elastic properties of metal nanowires, which can be described by a scale function. Contribution from the effects related to surface roughness and surface oxidation to the elastic modulus of nanostructures is also taken into account. The theoretical predictions are in excellent agreement with the experimental observations.