Elastic properties and buckling of silicon nanowires

Cheng Lun Hsin, Wenjie Mai, Yudong Gu, Yifan Gao, Chi Te Huang, Yuzi Liu, Lih Juann Chen, Zhong Lin Wang

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

A manipulation probe and an atomic force microscope (SFM) tip was used to investigate the mechanical behavior of a single silicon nanowires (SiNW) under bulking and bending conditions. The results show that under a homogeneous strain, the NW would become semicircular at the maximum deformation and its value is found to be ca. 1.5%. An increase in critical load, which is defined as the load higher than a clearly non-linear and bulking deformation, cause the NW to buckle. The mechanical behavior of the NW is found to be same as in the small-deflection linear part, showing that linear regime of the NW is rather large. The results also show that the degree of bending of SiNW is determined by the thickness of the object rather than its aspect ratio. The SiNW are also found to show ultrahigh flexibility and strong toughness, while the mechanical behavior of NW is found to follow Hooke's Law.

Original languageEnglish
Pages (from-to)3919-3923
Number of pages5
JournalAdvanced Materials
Volume20
Issue number20
DOIs
StatePublished - 17 Oct 2008

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