Journal
APPLIED PHYSICS LETTERS
Volume 81, Issue 14, Pages 2550-2552Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1502196
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Surface-enhanced Raman scattering spectra of an individual multiwalled carbon nanotube (MWNT) with the innermost diameter similar to1 nm, prepared by hydrogen arc discharge, show a single peak of radial breathing mode and multiple splitting of the tangential stretching G-band modes. Based on Lorentzian line shape analysis and related theoretical calculations, the G-band modes of MWNT are confirmed to be composed of both G-band modes (linewidth 4 cm(-1)) from the innermost tube and graphite-like mode (linewidth similar to20 cm(-1)) from the outer cylinders in MWNT. This observation indicates that MWNTs are unique and possess characteristic Raman spectra different from other sp(2) carbon allotropes. (C) 2002 American Institute of Physics.
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