材料的力学性能与其特征尺度的关系是材料科学领域关注的焦点问题之一。当材料特征尺度从宏观尺度减小到纳米尺度时,其力学性能将遵循何种规律,需要从实验和理论上寻找答案。作为纳机电系统(NEMS)重要的基本组元,一维纳米线、纳米管的力学性能表征对纳米器件的设计和制造具有重 The relationship between the mechanical properties of materials and their feature scales is one of the focus issues in the field of materials science. When the material characteristic scale is reduced from the macroscopic scale to the nanometer scale, its mechanical properties will follow which rules need to be found experimentally and theoretically. As an important basic component of nanoelectromechanical systems (NEMS), the characterization of the mechanical properties of one-dimensional nanowires and nanotubes has important implications for the design and fabrication of nanodevices