Diameter dependence of the Raman D-band in isolated single-wall carbon nanotubes

M. A. Pimenta, A. Jorio, S. D.M. Brown, A. G. Souza Filho, G. Dresselhaus, J. H. Hafner, C. M. Lieber, Riichiro Saito, M. S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

Abstract

Raman D-band spectra are reported for several different SWNTs using two different laser energies (E laser =1.58 and 2.41 eV). At a fixed E laser , individual isolated SWNTs exhibit different diameter-dependent D-band frequencies ω D around an average value. For both semiconducting and metallic tubes, ω D decreases with decreasing nanotube diameter, though ω D for isolated metallic SWNTs is higher than for isolated semiconducting SWNTs. The average D-band frequency depends linearly on E laser , as previously observed for SWNT bundles, suggesting that the D-band in SWNTs is activated by defects or by the finite size of the SWNTs.

Original languageEnglish
Article number041401
Pages (from-to)414011-414014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number4
Publication statusPublished - 2001 Jul 15
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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