TY - JOUR
T1 - Diameter dependent wall deformations during the compression of a carbon nanotube bundle
AU - Venkateswaran, U. D.
AU - Masica, D. L.
AU - Sumanasekera, G. U.
AU - Furtado, C. A.
AU - Kim, U. J.
AU - Eklund, P. C.
PY - 2003/12/31
Y1 - 2003/12/31
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=1042298134&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.68.241406
DO - 10.1103/PhysRevB.68.241406
M3 - Article
AN - SCOPUS:1042298134
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 24
ER -