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Phys. Rev. Lett. 95, 217401 (2005) [4 pages]

Raman Modes of Index-Identified Freestanding Single-Walled Carbon Nanotubes

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Jannik C. Meyer1 *, Matthieu Paillet2 †, Thierry Michel2, Alain Moréac3, Anita Neumann4, Georg S. Duesberg4, Siegmar Roth1, and Jean-Louis Sauvajol2
1Max Planck Institute for Solid State Research, Stuttgart, Germany
2Laboratoire des Verres, Colloïdes et Nanomatériaux (UMR CNRS 5587), Université de Montpellier II, France
3Groupe Matière Condensée et Matériaux (UMR CNRS 6626), Université de Rennes I, France
4Infineon Technologies Corporate Research, Munich, Germany

Received 25 June 2005; published 14 November 2005

Using electron diffraction on freestanding single-walled carbon nanotubes, we have determined the structural indices (n,m) of tubes in the diameter range from 1.4 to 3 nm. On the same freestanding tubes, we have recorded Raman spectra of the tangential modes and the radial breathing mode. For the smaller diameters (1.4–1.7 nm), these measurements confirm previously established radial breathing mode frequency versus diameter relations and would be consistent with the theoretically predicted proportionality to the inverse diameter. However, for extending the relation to larger diameters, either a yet unexplained environmental constant has to be assumed, or the linear relation has to be abandoned.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.95.217401
DOI: 10.1103/PhysRevLett.95.217401
PACS: 78.30.Na, 61.14.Lj, 73.22.−f, 78.67.Ch

* Electronic address: email@jannikmeyer.de
† Electronic address: paillet@lcvn.univ-montp2.fr

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