Techno Press
You logged in as. Techno Press

Coupled Systems Mechanics
  Volume 2, Number 2, June 2013 , pages 147-157
DOI: https://doi.org/10.12989/csm.2013.2.2.147
 

Radial deformation and band-gap modulation of pressurized carbon nanotubes
Hisao Taira, Hiroyuki Shima, Yoshitaka Umeno and Motohiro Sato

 
Abstract
    We numerically investigate the electronic band structure of carbon nanotubes (CNTs) under radial corrugation. Hydrostatic pressure application to CNTs leads to a circumferential wave-like deformation of their initially circular cross-sections, called radial corrugations. Tight-binding calculation was performed to determine the band gap energy as a function of the amplitude of the radial corrugation. We found that the band gap increased with increasing radial corrugation amplitude; then, the gap started to decline at a critical amplitude and finally vanished. This non-monotonic gap variation indicated the metal-semiconductor-metal transition of CNTs with increasing corrugation amplitude. Our results provide a better insight into the structure-property relation of CNTs, thus advancing the CNT-based device development.
 
Key Words
    carbon nanotube; radial corrugation; electronic structure; band gap energy; numerical calculation
 
Address
1 Hisao Taira and Motohiro Sato: Division of Engineering and Policy for Sustainable Environment, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan;
2 Hiroyuki Shima: Department of Environmental Sciences & Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-4-37, Takeda, Kofu, Yamanashi 400-8510, Japan;
3 Motohiro Sato: Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2025 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: admin@techno-press.com