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Open Access Nano Express

Transverse electric field–induced deformation of armchair single-walled carbon nanotube

Biao Kan1, Jianning Ding1*, Ningyi Yuan2, Junxiong Wang1, Zhigang Chen2 and Xiaoshuang Chen3

Author Affiliations

1 Center for Micro/Nano Science and Technology, Jiangsu University, 212013, Zhenjiang, Jiangsu, China

2 Jiangsu Polytechnic University, Ge Hu Road, 213164, Changzhou, Jiangsu, China

3 National Laboratory of Infrared Physics, Shanghai Institute for Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai, 200083, China

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Nanoscale Research Letters 2010, 5:1144-1149  doi:10.1007/s11671-010-9617-y

Published: 6 May 2010

Abstract

The deformation of armchair single-walled carbon nanotube under transverse electric field has been investigated using density functional theory. The results show that the circular cross-sections of the nanotubes are deformed to elliptic ones, in which the tube diameter along the field direction is increased, whereas the diameter perpendicular to the field direction is reduced. The electronic structures of the deformed nanotubes were also studied. The ratio of the major diameter to the minor diameter of the elliptic cross-section was used to estimate the degree of the deformation. It is found that this ratio depends on the field strength and the tube diameter. However, the field direction has little role in the deformation.

(See supplementary material 1)

Electronic supplementary material. The online version of this article (doi:10.1007/s11671-010-9617-y) contains supplementary material, which is available to authorized users.

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Keywords:
Carbon nanotube; Transverse electric field; Structural deformation; Electronic structure; Density functional theory