Bending-Mode Vibration of a Suspended Nanotube Resonator

Benoit Witkamp, Menno Poot, and Herre S. J. van der Zant*
Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands
Nano Lett., 2006, 6 (12), pp 2904–2908
DOI: 10.1021/nl062206p
Publication Date (Web): November 22, 2006
Copyright © 2006 American Chemical Society
*

 Corresponding author:  h.s.j.vanderzant@tudelft.nl.

Abstract

Abstract Image

We have used a suspended carbon nanotube as a frequency mixer to detect its own mechanical motion. A single gate-dependent resonance is observed, which we attribute to the fundamental bending mode vibration of the suspended carbon nanotubes. A continuum model is used to fit the gate dependence of the resonance frequency, from which we obtain values for the fundamental frequency, the residual and gate-induced tension in the nanotube. This analysis shows that the nanotubes in our devices have no slack and that, by applying a gate voltage, the nanotube can be tuned from a regime without strain to a regime where it behaves as a vibrating string under tension.

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History

  • Published In Issue December 13, 2006
  • Received September 19, 2006
    Revised Manuscript Received November 8, 2006

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