DocumentCode :
1886338
Title :
Terahertz wave propagation in multiwall carbon nanotubes
Author :
Yoon, J. ; Ru, C.Q. ; Mioduchowski, A.
Author_Institution :
Dept. of Mech. Eng., Univ. of Alberta, Edmonton, Alta., Canada
fYear :
2003
fDate :
20-23 July 2003
Firstpage :
430
Lastpage :
434
Abstract :
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.
Keywords :
acoustic wave propagation; carbon nanotubes; ultrasonic propagation; vibrational modes; multiple elastic beam model; multiwall carbon nanotube; terahertz sound wave propagation; Acoustic beams; Acoustic propagation; Carbon nanotubes; Coaxial components; Frequency; Large-scale systems; Mechanical engineering; Predictive models; Submillimeter wave propagation; Vibrations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
MEMS, NANO and Smart Systems, 2003. Proceedings. International Conference on
Print_ISBN :
0-7695-1947-4
Type :
conf
DOI :
10.1109/ICMENS.2003.1222036
Filename :
1222036
Link To Document :
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