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Comparative Raman spectroscopy of individual and bundled double wall carbon nanotubes

Puech, Pascal and Nanot, Sébastien and Raquet, Bertrand and Broto, Jean-Marc and Millot, Marius and Anwar, Abdul Waheed and Flahaut, Emmanuel and Bacsa, Wolfgang Comparative Raman spectroscopy of individual and bundled double wall carbon nanotubes. (2010) physica status solidi b, vol. 248 (n° 4). pp. 974-979. ISSN 0370-1972

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Official URL: http://dx.doi.org/10.1002/pssb.200945548

Abstract

Raman spectra of individual double wall carbon nanotubes(DWs) on silica show a splitting of the G band due to contributions of the inner and outer tube when using a excitation energy in resonance with the inner metallic tube and outer semiconducting tube. The spectral splitting indicates strong coupling while a previous report [Nanoletters 8, 3879 (2008)] shows uncoupled inner and outer tubes. The spectral line widths are comparable to what has been observed for individual single wall carbon nanotubes (SWs) or graphene. The spectral position of the inner tube is consistent with previous extrapolations from measurements under high pressure and on chemically doped double wall tubes. Bundling of DWs leads to heterogeneous increase of the G band line width. Increased laser power shifts the G band of the outer tube to higher energies and modifies its line shape.

Item Type:Article
Additional Information:L'éditeur John Wiley and sons ne permet pas la diffusion en archive ouverte
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Université Joseph Fourier Grenoble 1 - UJF (FRANCE)
Laboratory name:
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Deposited By: Denis Faragou

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