Li Xiaodong, Wang Xinnan, Xiong Qihua, Eklund Peter C
Department of Mechanical Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208, USA.
Nano Lett. 2005 Oct;5(10):1982-6. doi: 10.1021/nl0513885.
Mechanical properties of ZnS nanobelts were measured at room temperature by direct nanoindentation experiments. It was found that the ZnS nanobelts achieve 79% increase in hardness but 52% decrease in elastic modulus compared to bulk ZnS. The nanobelts were found to exhibit creep under indentation. Indentation cracking was preferred along the belt growth direction. Indentation deformation behavior and fracture mechanisms of the ZnS nanobelts are discussed in conjunction with their crystalline structure, size effect, and surface-to-volume ratio.
通过直接纳米压痕实验在室温下测量了ZnS纳米带的力学性能。结果发现，与块状ZnS相比，ZnS纳米带的硬度提高了79%，但弹性模量降低了52%。发现纳米带在压痕下会出现蠕变。压痕裂纹沿带的生长方向更易出现。结合ZnS纳米带的晶体结构、尺寸效应和表面积与体积比，讨论了其压痕变形行为和断裂机制。
