Regularity in the intratube interaction in double-wall carbon nanotubes

Details Regularity in the intratube interaction in double-wall carbon nanotubes Regularity in the intratube interaction in double-wall carbon nanotubes

2005-04-08

arxiv.org/abs/cond-mat/0504213v1

Physics

Condensed Matter

Materials Science

PDF with 13 pages, 2 figures, submitted to Physical Review Letters

Scientific paper

High pressure Raman experiments were performed on bundled double wall carbon nanotubes (DWCNTs). We observe peculiar regularity in the strength of the inner-outer tube (intratube) interaction, which is attributed to the interplay between the tube size and the intratube spacing. Moreover, a pressure-induced red shift of the band gap energies of the probed inner tubes is deduced from the Raman spectra. These experimental findings reveal that the interaction between primary and secondary shells, although generally assumed to be weak, determines the dynamics in the interior of the DWCNTs.

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