Shape Stability of Metallic Nanoplates: A Molecular Dynamics Study

被引：0
作者：
Xiwen Chen
Rao Huang
Tien-Mo Shih
Yu-Hua Wen
机构：
[1] Xiamen University,Department of Physics
[2] University of California,Department of Mechanical Engineering
来源：
Nanoscale Research Letters | 2019年 / 14卷
关键词：
Metal; Nanoplate; Stability; Molecular dynamics;
D O I：
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学科分类号：
摘要：
Metallic nanoplates have attracted widespread interests owing to their functional versatility, which relies heavily on their morphologies. In this study, the shape stability of several metallic nanoplates with body-centered-cubic (bcc) lattices is investigated by employing molecular dynamics simulations. It is found that the nanoplate with (110) surface planes is the most stable compared to the ones with (111) and (001) surfaces, and their shapes evolve with different patterns as the temperature increases. The formation of differently orientated facets is observed in the (001) nanoplates, which leads to the accumulation of shear stress and thus results in the subsequent formation of saddle shape. The associated shape evolution is quantitatively characterized. Further simulations suggest that the shape stability could be tuned by facet orientations, nanoplate sizes (including diameter and thickness), and components.
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