Second-order Raman scattering from linear carbon chains inside multiwalled carbon nanotubes (Articolo in rivista)

Type
Label
  • Second-order Raman scattering from linear carbon chains inside multiwalled carbon nanotubes (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Cupolillo, A; Castriota, M; Cazzanelli, E; Caputi, L; Giallombardo, C; Mariotto, G; Papagno, L (2008)
    Second-order Raman scattering from linear carbon chains inside multiwalled carbon nanotubes
    in Journal of Raman spectroscopy
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cupolillo, A; Castriota, M; Cazzanelli, E; Caputi, L; Giallombardo, C; Mariotto, G; Papagno, L (literal)
Pagina inizio
  • 147 (literal)
Pagina fine
  • 152 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 39 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Cupolillo, A.; Castriota, M.; Cazzanelli, E.; Caputi, L.; Giallombardo, C.; Papagno, L.] Univ Calabria, Dept Phys, I-87036 Arcavacata Di Rende, Italy; [Cupolillo, A.; Papagno, L.] Inst Nazl Fis Nucl, Grp Coll Cosenza, I-87036 Arcavacata Di Rende, Italy; [Castriota, M.; Cazzanelli, E.] Univ Calabria, LICRYL, CNR, INFM, I-87036 Arcavacata Di Rende, Italy; [Castriota, M.; Cazzanelli, E.] Univ Calabria, CEMIF CAL, I-87036 Arcavacata Di Rende, Italy; [Mariotto, G.] Univ Verona, Dept Comp Sci, I-37134 Verona, Italy (literal)
Titolo
  • Second-order Raman scattering from linear carbon chains inside multiwalled carbon nanotubes (literal)
Abstract
  • The present investigation concerns multiwalled carbon nanotubes synthesized on graphite cathodes by arc discharge in a He atmosphere, either with the insertion of a catalytic Ni-Cr mixture or without catalysts. The morphology of the deposited cathodes was investigated by SEM, while the amount of carbon chains inside multiwalled carbon nanotubes (C@MWCNT) in various regions of the deposited cathodes was revealed by a parallel micro-Raman study, through the analysis of the signal from the Raman bands generated by C@MWCNT in the range 1780-1870 cm(-1) (L bands). In samples obtained by using the catalyst, a very high concentration of linear carbon chains is found in some zones, as indicated by the intensity of the L band, which turns out remarkably stronger than the G band of the host nanotubes. In these zones, the second-order Raman scattering is clearly observed, too. The experimental wavenumber values of the 2 L overtone are slightly lower than the exact doubling of the one-phonon peak wavenumber, and this fact is discussed in terms of the existing theoretical predictions for the chain-mode dispersion curve. Copyright (C) 2008 John Wiley & Sons, Ltd. (literal)
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