Characterisation of carbon nano-onions using Raman spectroscopy

D. Roy, Manish Chhowalla, H. Wang, N. Sano, I. Alexandrou, T. W. Clyne, G. A J Amaratunga

Research output: Contribution to journalArticle

189 Citations (Scopus)

Abstract

Characteristics of the Raman spectrum from carbon onions have been identified in terms of the position of the G peak and appearance of the transverse optic phonon peaks. Five new peaks were observed in the low wavenumber region, at about 1100, 861, 700, 450 and 250 cm-1. The origins of these peaks are discussed in terms of the phonon density of states (PDOS) and phonon dispersion curves of graphite. The curvature of the graphene planes is invoked to explain the relaxation of the Raman selection rules and the appearance of the new peaks. The Raman spectrum of carbon onions is compared with that of highly oriented pyrolytic graphite (HOPG). The strain of graphene planes due to curvature has been estimated analytically and is used to account for the downward shift of the G peak.

Original languageEnglish
Pages (from-to)52-56
Number of pages5
JournalChemical Physics Letters
Volume373
Issue number1-2
DOIs
Publication statusPublished - May 13 2003

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Graphite
Raman spectroscopy
Carbon
carbon
Raman scattering
graphene
curvature
Raman spectra
Optics
pyrolytic graphite
graphite
optics
shift
curves

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Roy, D., Chhowalla, M., Wang, H., Sano, N., Alexandrou, I., Clyne, T. W., & Amaratunga, G. A. J. (2003). Characterisation of carbon nano-onions using Raman spectroscopy. Chemical Physics Letters, 373(1-2), 52-56. https://doi.org/10.1016/S0009-2614(03)00523-2

Characterisation of carbon nano-onions using Raman spectroscopy. / Roy, D.; Chhowalla, Manish; Wang, H.; Sano, N.; Alexandrou, I.; Clyne, T. W.; Amaratunga, G. A J.

In: Chemical Physics Letters, Vol. 373, No. 1-2, 13.05.2003, p. 52-56.

Research output: Contribution to journalArticle

Roy, D, Chhowalla, M, Wang, H, Sano, N, Alexandrou, I, Clyne, TW & Amaratunga, GAJ 2003, 'Characterisation of carbon nano-onions using Raman spectroscopy', Chemical Physics Letters, vol. 373, no. 1-2, pp. 52-56. https://doi.org/10.1016/S0009-2614(03)00523-2
Roy, D. ; Chhowalla, Manish ; Wang, H. ; Sano, N. ; Alexandrou, I. ; Clyne, T. W. ; Amaratunga, G. A J. / Characterisation of carbon nano-onions using Raman spectroscopy. In: Chemical Physics Letters. 2003 ; Vol. 373, No. 1-2. pp. 52-56.
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