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Stability of carbon nanotubes to laser irradiation probed by Raman spectroscopy
Author(s) -
Olevik D.,
Soldatov A. V.,
Dossot M.,
Vigolo B.,
Humbert B.,
McRae E.
Publication year - 2008
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200879661
Subject(s) - raman spectroscopy , carbon nanotube , irradiation , laser , power density , materials science , laser power scaling , spectroscopy , photon energy , analytical chemistry (journal) , photon , nanotechnology , chemistry , optics , power (physics) , nuclear physics , physics , chromatography , quantum mechanics
We report on a systematic study of the influence of laser irradiation on the Raman spectra of HiPco‐produced single‐wall CNTs. Specifically, we have examined the Raman response of bundled CNTs to: i) laser power density; ii) exposure time and iii) photon energy (1.96 and 2.33 eV). Our results show that irreversible destruction of CNTs in the bundles can occur at even low laser power density (0.15 kW/cm 2 ). The tubes with smaller diameters are influenced first and the rate of CNT destruction increases with photon energy. Finally, we determined that when investigating destruction of CNT bundles, the use of a low laser power density is required because changes in the structure of the bundles can lead to sample temperature changes for otherwise identical measurement parameters. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)