Interaction between concentric Tubes in DWCNTs

Details Interaction between concentric Tubes in DWCNTs Interaction between concentric Tubes in DWCNTs

2004-06-28

arxiv.org/abs/cond-mat/0406670v1

Eur. Phys. J. B 42, 345 (2004)

Physics

Condensed Matter

Materials Science

6 pages, 7 figures, submitted to Eur. Phys. J. B

Scientific paper

10.1140/epjb/e2004-00389-0

A detailed investigation of the Raman response of the inner tube radial breathing modes (RBMs) in double-wall carbon nanotubes is reported. It revealed that the number of observed RBMs is two to three times larger than the number of possible tubes in the studied frequency range. This unexpected increase in Raman lines is attributed to a splitting of the inner tube response. It is shown to originate from the possibility that one type of inner tube may form in different types of outer tubes and the fact that the inner tube RBM frequency depends on the diameter of the enclosing tube. Finally, a comparison of the inner tube RBMs and the RBMs of tubes in bundles gave clear evidence that the interaction in a bundle is stronger than the interaction between inner and outer tubes.

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