Title: Frequency shift of Single-Walled Carbon Nanotube under axial load

Authors: Biao Kan, Jianning Ding, Guanggui Cheng, Xiuqin Wang, Zhen Fan, Zhiyong Ling

Addresses: Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, PR China. ' Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, PR China. ' Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, PR China. ' Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, PR China. ' Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, PR China. ' Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, PR China

Abstract: An atomic-scale finite element model is employed to study the mechanical vibration frequency shift of armchair and zigzag Single-Walled Carbon Nanotubes (SWCNT) under axial load. Tersoff-Brenner potential is used to define the interactions between the atoms as well as the mechanical properties of the elements in the model. The fundamental frequencies corresponding to the transverse and radial vibration modes of strained SWCNTs increase under compression load, yet they decrease under stretching load. The frequency sensitivities of nanotubes with different diameters and lengths are also investigated. The influence of size effect, curvature effect and the boundary condition are discussed.

Keywords: CNT; carbon nanotubes; frequency shift; transverse vibration; radial vibration; strain; axial loading; nanotechnology; finite element method; FEM; modelling; Tersoff-Brenner potential; compression load; stretching load; size effect; curvature effect; boundary condition.

DOI: 10.1504/IJSURFSE.2010.033254

International Journal of Surface Science and Engineering, 2010 Vol.4 No.3, pp.269 - 277

Available online: 14 May 2010 *

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