Raman Spectrum of SWNTs at Different Excitation Wavelengths

Abstract

Abstract: The single-walled carbon nanotubes(SWNTs) was synthesized by electric arc discharge method, and the normal Raman and resonant Raman scattering spectra of SWNTs were measured at 457.5 and 632.8 nm laser excitation wavelengths. By theoretical analysis, the diameter distributions of SWNTs were obtained, the style and configuration parameter were speculated further. By a Lorentzian line-shape analysis of the spectral feature for G mode, the component of the tangential stretch mode of SWTNs was assigned. The variational curve of the value of I-G/I-D for its changing with the variation of the laser power was obtained under 632.8 nm excitation. Disfigurement structure of SWNTs have a variety when laser power is 2.5 mW. In the Raman scattering spectra of SWNTs under 457.5 nm excitation, the new Raman peak under 1 421 cm^-1 is discovered for the first time.

Key words: Single-walled carbon nanotubes(SWNTs), Raman spectrum, Resonance, Density of electronic one-dimensional states

CLC Number:

O643.3

TrendMD:

CHEN Lin-Tao, ZHANG Zhen-Long, BAI Ying, WANG Yu-Fang, MO Yu-Jun. Raman Spectrum of SWNTs at Different Excitation Wavelengths[J]. Chem. J. Chinese Universities, 2005, 26(9): 1662.

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Raman Spectrum of SWNTs at Different Excitation Wavelengths

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