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Ultraviolet photon absorption in single- and double-wall carbon nanotubes and peapods: Heating-induced phonon line broadening, wall coupling, and transformation

Puech, Pascal and Puccianti, Frederic and Bacsa, Revathi and Arrondo, Cécile and Paillard, Vincent and Bassil, Ayman and Monthioux, Marc and Flahaut, Emmanuel and Bardé, Fanny and Bacsa, Wolfgang Ultraviolet photon absorption in single- and double-wall carbon nanotubes and peapods: Heating-induced phonon line broadening, wall coupling, and transformation. (2007) Physical Review B (PRB), vol. 76 (n° 5). 054118-1. ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.76.054118

Abstract

Ultraviolet photon absorption has been used to heat single- and double-wall carbon nanotubes and peapods in vacuum. By increasing the laser intensity up to 500 mW, a downshift and a broadening of the optical phonons are observed corresponding to a temperature of 1000°C. The UV Raman measurements are free of blackbody radiation. We find that the linewidth changes for the G+ and G− bands differ considerably in single-wall carbon nanotubes. This gives evidence that the phonon decay process is different in axial and radial tube directions. We observe the same intrinsic linewidths of graphite (highly oriented pyrolytic graphite) for the G band in single- and double-wall carbon nanotubes. With increasing temperature, the interaction between the walls is modified for double-wall carbon nanotubes. Ultraviolet photon induced transformations of peapods are found to be different on silica and diamond substrates.

Item Type:Article
Additional Information:Thanks to American Physical Society editor. The definitive version is available at http://scitation.aip.org The original PDF of the article can be found at Physical Review B (PRB) website : http://prb.aps.org/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Toyota Motor Europe (BELGIUM)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Celine Cabaup
Deposited On:05 Jun 2009 15:08

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