Electronic transport through bent carbon nanotubes: Nanoelectromechanical sensors and switches

Phys. Rev. B 67, 205423 – Published 30 May 2003
Amir A. Farajian, Boris I. Yakobson, Hiroshi Mizuseki, and Yoshiyuki Kawazoe


We theoretically investigate the mechanical deformations of armchair, zigzag, and zigzag-armchair kink nanotube structures, under severe bendings, within a tight-binding model. It is shown that the zigzag tube is stiffer than the armchair tube with the same diameter. The kink structure is found to be quite stable under severe bendings. Calculating the I-Vcharacteristics, we show that, at the same bias, the current of metallic tube decreases with increased bending, while that of semiconducting tube increases. Such a universal behavior is not observed for the kink structure due to two competing effects. Possible application to nanoelectromechanical sensors and switches is discussed.

DOI: http://dx.doi.org/10.1103/PhysRevB.67.205423

  • Received 16 December 2002
  • Published 30 May 2003

© 2003 The American Physical Society

Authors & Affiliations

Amir A. Farajian1,*, Boris I. Yakobson2, Hiroshi Mizuseki1, and Yoshiyuki Kawazoe1

  • 1Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 2Center for Nanoscale Science and Technology, Department of Mechanical Engineering and Materials Science, Rice University, Houston, Texas 77251-1892

  • *Electronic address: amir@imr.edu

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