| Autor: |
Tan, PingHeng, Dimovski, Svetlana, Gogotsi, Yury |
| Zdroj: |
Philosophical Transactions A: Mathematical, Physical and Engineering Sciences; November 2004, Vol. 362 Issue: 1824 p2289-2310, 22p |
| Abstrakt: |
Planar graphite has been extensively studied by Raman scattering for years. A comparative Raman study of several different and less common non–planar graphitic materials is given here. New kinds of graphite whiskers and tubular graphite cones (synthetic and natural) have been introduced. Raman spectroscopy has been applied to the characterization of natural graphite crystal edge planes, an individual graphite whisker, graphite polyhedral crystals and tubular graphite cones. Almost all of the observed Raman modes were assigned according to the selection rules and the double–resonance Raman mechanism. The polarization properties related to the structural features, the line shape of the first–order dispersive mode and its combination modes, the frequency variation of some modes in different carbon materials and other unique Raman spectral features are discussed here in detail. |
| Databáze: |
Supplemental Index |
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