Work

Effect of van der Waals Interactions on the Raman Modes in Single Walled Carbon Nanotubes

Year: 2001

Type: article

Abstract: We have measured the Raman spectrum of individual single walled carbon nanotubes in solution and compare it to that obtained from the same starting material where the tubes are present in ordered bundles or ropes. Interestingly, the radial mode frequencies for the tubes in solution are found to be approximately 10 cm (-1) higher than those observed for tubes in a rope, in apparent contradiction to lattice dynamics predictions. We suggest that there is no such contradiction, and propose that the upshift is due rather to a decreased energy spacing of the Van Hove singularities in isolated tubes over the spacings in a rope, thereby allowing the same laser excitation to excite different diameter tubes in these two samples.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.86.3895

Authors: A. M. Rao, J. Chen, E. Richter, U. Schlecht, P. C. Eklund, R. C. Haddon, U. D. Venkateswaran, Y.-K. Kwon, D. Tománek

Institutions: Clemson University, University of Kentucky, Pennsylvania State University, Oakland University, Michigan State University

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2048055052

FWCI: 16.16

Cites: 23

Cited by: 349

Related to: 10