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Proceedings Paper

Size-dependent and orientation-dependent Young's modulus of silicon nanowires
Author(s): Li-Bing Lu; Hong Yu; Wei-Wei Zhang
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Paper Abstract

We use molecular dynamical software Material StudioTM to investigate Young's moduli of Silicon nanowires along [001], [110] and [111] directions. Young's moduli for various directional and sized specimens are obtained via the energy-strain curves. The study suggests that the Young's modulus decreases as the thickness of the specimen decreases especially for the [001] direction, which display the peculiarity of anisotropy and size dependence. In comparison with the bulk silicon, the overall nanowires become soften for all the three directions. With respect to the results reported, similar trend is observed but magnitude of Young's modulus is not the same with each other. We analyze the dependence of Young's modulus on the size, surface structure and boundary conditions.

Paper Details

Date Published: 25 August 2009
PDF: 5 pages
Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73753E (25 August 2009); doi: 10.1117/12.839253
Show Author Affiliations
Li-Bing Lu, Southeast Univ. (China)
Hong Yu, Southeast Univ. (China)
Wei-Wei Zhang, Southeast Univ. (China)

Published in SPIE Proceedings Vol. 7375:
ICEM 2008: International Conference on Experimental Mechanics 2008
Xiaoyuan He; Huimin Xie; YiLan Kang, Editor(s)

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