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Terahertz wave propagation in multiwall carbon nanotubes

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3 Author(s)
Yoon, J. ; Dept. of Mech. Eng., Univ. of Alberta, Edmonton, Alta., Canada ; Ru, C.Q. ; Mioduchowski, A.

This paper aims to study sound wave propagation in individual multiwall carbon nanotubes based on a multiple-elastic beam model. The present model predicts that there exist (N-1) critical frequencies (within terahertz range) for an N-wall carbon nanotube. Sound wave propagation in multiwall carbon nanotubes is almost coaxial only when the frequency is much below all critical frequencies, and becomes substantially non-coaxial when the frequency is higher than at least one of the (N-1) critical frequencies. In the latter case, the sound speeds predicted by the present model are significantly higher or lower than that given by the existing single-beam model. Hence, terahertz sound waves in multiwall carbon nanotubes exhibit complex new phenomena and are essentially non-coaxial.

Published in:

MEMS, NANO and Smart Systems, 2003. Proceedings. International Conference on

Date of Conference:

20-23 July 2003

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