Surface effect on resonant properties of nanowires predicted by an elastic theory for nanomaterials

Yin Yao, Shaohua Chen*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

31 引用 (Scopus)

摘要

A recently developed continuum theory considering surface effect in nanomaterials is adopted to investigate the resonant properties of nanowires with different boundary conditions in the present paper. The main feature of the adopted theory is that the surface effect in nanomaterials is characterized by the surface energy density of the corresponding bulk materials and the surface relaxation parameter in nanoscale. Based on a fixed-fixed beam model and a cantilever one, the governing equation of resonant frequency for corresponding nanowires is obtained. Numerical calculation of the fundamental resonant frequency is carried out, the result of which is well consistent with the existing numerical ones. Comparing to the result predicted by the conventionally structural dynamics, the resonant frequency of a fixed-fixed nanowire is improved, while that of a cantilever nanowire is weakened due to the surface effect. Both a decreasing characteristic size (height or diameter) and an increasing aspect ratio could further enhance the varying trend of resonant properties for both kinds of nanowires. The present result should be helpful for the design of nano-devices and nanostructures related to nanowires.

源语言英语
文章编号044303
期刊Journal of Applied Physics
118
4
DOI
出版状态已出版 - 28 7月 2015
已对外发布

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