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Type: Artigo de periódico
Title: Comparative study of first- and second-order Raman spectra of MWCNT at visible and infrared laser excitation
Author: Antunes, EF
Lobo, AO
Corat, EJ
Trava-Airoldi, VJ
Martin, AA
Verissimo, C
Abstract: Comparative studies of first- and second-order Raman spectra of multi-walled carbon nanotubes (MWCNT) and three other graphitic materials - carbon fiber, powdered graphite and highly ordered pyrolytic graphite - are reported. Three laser excitation wavelengths were used: 514.5, 785 and 1064 nm. In first-order Raman spectra, the positions of the bands D, G and D' (1100-1700 cm(-1)) presented very similar behavior, however the intensity (I) ratio I(D)/I(G) ratio showed differed behaviors for each material which may be correlated to differences in their structural ordering. In the second-order spectra, the G' band varied strongly according to structure with the infrared laser excitation. (C) 2006 Elsevier Ltd. All rights reserved.
Subject: carbon nanotubes
carbon fiber
Raman spectroscopy
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Carbon. Pergamon-elsevier Science Ltd, v. 44, n. 11, n. 2202, n. 2211, 2006.
Rights: fechado
Identifier DOI: 10.1016/j.carbon.2006.03.003
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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