Molecular dynamics study on size-dependent elastic properties of silicon nanoplates

被引：23

作者：

Gong, Baoming ^{[1
]}

Chen, Qiang ^{[1
]}

Wang, Dongpo ^{[2
]}

机构：

[1] Politecn Torino, Dept Struct Engn & Geotech, I-10129 Turin, Italy

[2] Tianjin Univ, Dept Mat Sci & Engn, Tianjin 300072, Peoples R China

来源：

MATERIALS LETTERS | 2012年 / 67卷 / 01期

关键词：

Surface effect; Molecular dynamics simulation; Surface reconstruction; Silicon nanoplate; STRESS; SURFACE;

D O I：

10.1016/j.matlet.2011.09.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using molecular dynamics simulations, the size-dependent Young's moduli of silicon nanoplates due to surface effects are investigated at intrinsic scale. The transformations of surface reconstructions are discussed in terms of the difference between the total strain energy densities (U-T) of the system from the MD and the specified strain energy densities (u(c)). An analytical prediction for the effective Young's modulus is derived for the intrinsic scale specimens, and it agrees well with MD simulations. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：165 / 168

页数：4

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