Diameter dependent wall deformations during the compression of a carbon nanotube bundle

U. D. Venkateswaran, D. L. Masica, G. U. Sumanasekera, C. A. Furtado, U. J. Kim, P. C. Eklund

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55 Scopus citations

Abstract

Raman scattering is used to study the pressure-dependence of the radial (R) bands of bundled single-walled carbon nanotubes (SWNT) produced by the HiPCO process. We find that the normalized pressure derivative of the R-band frequency, Φ = d(ln ωR)/dP, increases with increasing nanotube diameter D as Φ ∼ D2. Using results from elastic theory, we show that the contribution to Φ from isolated SWNT, (= Φ0), is small, which agrees with previous model calculations. We show here that Φ0 is independent of D. We conclude that most of the pressure dependence observed for the R bands in SWNT bundles may be identified with tube wall deformations mediated via tube-tube interactions within a bundle and not with the compression of an individual tube.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number24
DOIs
StatePublished - 31 Dec 2003

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