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Micro-Raman scattering of selenium-filled double-walled carbon nanotubes: Temperature study

Sendova, Mariana and Datas, Lucien and Flahaut, Emmanuel Micro-Raman scattering of selenium-filled double-walled carbon nanotubes: Temperature study. (2009) Journal of Applied Physics, vol. 105 (n° 9). ISSN 1089-7550

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Official URL: http://dx.doi.org/10.1063/1.3122301

Abstract

Selenium-filled double-walled carbon nanotubes Se@DWNT have been studied by high resolution transmission electron microscopy HRTEM and micro-Raman spectroscopy in the temperature interval from 80 to 600 K employing 785 nm excitation wavelength. The temperature dependences of the dominant bands G-band and G-band are analyzed in terms of the model developed by Klemens Phys. Rev. 148, 845 1966, Hart et al. Phys. Rev. B 1, 638 1970, Cowley J. Phys. France 26, 659 1965 and extended by Balkanski et al. Phys. Rev. B 26, 1928 1983 for anharmonic decay of optical phonons. The findings were compared to analogous study for empty double-walled carbon nanotubes DWNTs. The DWNT interatomic force constant modification as a result of the presence of the Se atoms inside the tubes is revealed through larger anharmonicity constants describing the temperature dependences of the G-band and the inner tube tangential modes G-band

Item Type:Article
Additional Information:Thanks to American Institute of Physics editor. The definitive version is available at http://jap.aip.org/ The original PDF of the article can be found at Journal of Applied Physics website : http://jap.aip.org/japiau/v105/i9/p094312_s1
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 > Université Paul Sabatier-Toulouse III - UPS
Other partners > New College of Florida (USA)
Laboratory name:
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Deposited By: Nihad Lahdifi

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