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

被引:46
作者
Venkateswaran, UD [1 ]
Masica, DL
Sumanasekera, GU
Furtado, CA
Kim, UJ
Eklund, PC
机构
[1] Oakland Univ, Dept Phys, Rochester, MI 48309 USA
[2] Univ Louisville, Dept Phys, Louisville, KY 40292 USA
[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
来源
PHYSICAL REVIEW B | 2003年 / 68卷 / 24期
关键词
D O I
10.1103/PhysRevB.68.241406
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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, Phi=d(ln omega(R))/dP, increases with increasing nanotube diameter D as Phisimilar toD(2). Using results from elastic theory, we show that the contribution to Phi from isolated SWNT, (=Phi(0)), is small, which agrees with previous model calculations. We show here that Phi(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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页数:4
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