Raman Investigation of Singlewalled Carbon Nanotubes
作者:
S. Lefrant,
M.Lamy de la Chapelle,
I. Baltog,
C. Journet,
P. Bernier,
E. Munoz,
A. Benito,
W.K. Maser,
M.T. Martinez,
G.F. de la Fuente,
D. Laplaze,
A. Loiseau,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 322,
issue 1
页码: 71-78
ISSN:1058-725X
年代: 1998
DOI:10.1080/10587259808030202
出版商: Taylor & Francis Group
关键词: Carbon compounds;nanotubes;Raman scattering;High resolution transmission electron microscopy
数据来源: Taylor
摘要:
Singlewalled carbon nanotubes (SWNT's) prepared by the electric arc method are characterized by means of spectroscopic techniques, mainly Transmission Electron Microscopy and resonance Raman scattering. TEM observations reveal the existence of nïckel particles embedded in an amorphous carbon matrix, but also a large concentration of SWNT's, whose average diameter can be estimated to be near 1.3 nm, arranged in bundles. Raman spectra recorded on the same samples exhibit several features, mainly consisting of two groups. On one hand, in the high frequency region, several bands are observed in the range 1500 - 1600 cm−1, corresponding to a splitting of the E2g2vibrational mode of graphite. On the other hand, several components are recorded between 150 and 240 cm−1, reflecting a distribution in the diameter of the SWNT's. A systematic study of the ≪collaret≫, from which samples are extracted, is also presented.
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