摘要
Based on the anharmonic Keating model and the modified bending theory,an analytical semi-continuum atomistic lattice model is proposed for the size-dependent bending mechanical analysis of silicon nanowires(SiNWs)with different cross-sectional shapes.The semi-continuum model proves that the elastic behavior of SiNWs is size-dependent and predicts softer or stiffer SiNWs which depend on the relaxation coefficient and the surface tension.It also shows that the size effects of the mechanical responses of SiNWs depend on not only surface effects but also the cross-sectional shapes of SiNWs.
作者
GU Fang
ZHANG Jia-Hong
XU Lin-Hua
LIU Qing-Quan
LI Min
顾芳;张加宏;徐林华;刘清惓;李敏(College of Mathematics and Physics,Nanjing University of Information Science and Technology,Nanjing 210044;College of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044)
基金
Supported by the National Natural Science Foundation of China under Grant Nos.41075026 and 61001044
the Open Research Fund of Key Laboratory of MEMS of Ministry of Education,Southeast University under Grant Nos.2009-03 and 2010-02
the Special Fund for Meteorology Research in the Public Interest under Grant No.GYHY200906037.
