Raman spectra of Graphon carbon black |
| |
Authors: | Terrence P. Mernagh Ralph P. Cooney Robert A. Johnson |
| |
Affiliation: | Chemistry Department, University of Newcastle, N.S.W.Australia 2308 |
| |
Abstract: | The Raman spectrum of Graphon carbon black has been recorded using rotating cell techniques. Angular dependence of scattering at 1360, 1580 and 2700 cm?1 are reported and these data suggest that the 1360 cm?1 line is associated with non-planar microstructure distortions. The excitation frequency dependence of the intensity ratio of the bands at 1360 (D) and 1580 cm?1 (G) is interpreted in terms of resonance (vibronic) interaction. This dependence is primarily the result of an increase in the intensity of the 1360 cm ?1 line. The disorder-associated line (D) exhibits a significant excitation-dependent shift from 1378 cmi?1 (457.9 nm Ar+) to 1330 cm?1 (647.1 nm Kr+). The “graphite” (G) line position is less sensitive to changes in excitation frequency. The spectral features are discussed in terms of factor group, C6v4, and layer site symmetry, C3v. Also the possible role of localized alkene-like structure in zones of structural distortion is considered. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|