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Resonant Raman Effect in Single-wall Carbon Nanotubes

Published online by Cambridge University Press:  31 January 2011

M. A. Pimenta ,
A. Marucci ,
S. D. M. Brown ,
M. J. Matthews ,
A. M. Rao ,
P. C. Eklund ,
R. E. Smalley ,
G. Dresselhaus  and
M. S. Dresselhaus
M. A. Pimenta
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
A. Marucci
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
S. D. M. Brown
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
M. J. Matthews
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
A. M. Rao
Affiliation:
Department of Physics and Astronomy and Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40506
P. C. Eklund
Affiliation:
Department of Physics and Astronomy and Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40506
R. E. Smalley
Affiliation:
Department of Chemistry and Center for Nanoscale Technology & Science, Rice University, Houston, Texas 77005
G. Dresselhaus
Affiliation:
Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
M. S. Dresselhaus
Affiliation:
Department of Electrical Engineering and Computer Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Abstract

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A resonant Raman study of single-wall carbon nanotubes (SWNT) using several laser lines between 0.94 and 3.05 eV is presented. A detailed lineshape analysis shows that the bands associated with the nanotube radial breathing mode are composed of a sum of individual peaks whose relative intensities depend strongly on the laser energy, in agreement with prior work. On the other hand, the shape of the Raman bands associated with the tangential C–C stretching motions in the 1500–1600 cm−1 range does not depend significantly on the laser energy for laser excitation energies in the ranges 0.94–1.59 eV and 2.41–3.05 eV. However, new C–C stretching modes are observed in the spectra collected using laser excitations with energies close to 1.9 eV. The new results are discussed in terms of the difference between the 1D electronic density of states for the semiconducting and metallic carbon nanotubes.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2396 - 2404
Copyright
Copyright © Materials Research Society 1998

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