Diameter dependent wall deformations during the compression of a carbon nanotube bundle
UD Venkateswaran, DL Masica, GU Sumanasekera… - Physical Review B, 2003 - APS
Physical Review B, 2003•APS
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 ω R)/d P,
increases with increasing nanotube diameter D as Φ∼ D 2. Using results from elastic
theory, we show that the contribution to Φ from isolated SWNT,(= Φ 0), is small, which
agrees with previous model calculations. We show here that Φ 0 is independent of D. We …
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 ω R)/d P,
increases with increasing nanotube diameter D as Φ∼ D 2. Using results from elastic
theory, we show that the contribution to Φ from isolated SWNT,(= Φ 0), is small, which
agrees with previous model calculations. We show here that Φ 0 is independent of D. We …
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 ω R)/d P, increases with increasing nanotube diameter D as Φ∼ D 2. Using results from elastic theory, we show that the contribution to Φ from isolated SWNT,(= Φ 0), is small, which agrees with previous model calculations. We show here that Φ 0 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.
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