Raman spectra of Graphon carbon black

✍ Scribed by Terrence P. Mernagh; Ralph P. Cooney; Robert A. Johnson

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 412 KB
• Volume: 22
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(84)90130-1

✦ Synopsis

The Raman spectrum of Graphon carbon black has been recorded using rotating cell techniques. Angular dependence of scattering at 1360, 1580 and 2700 cm ' are reported and these data suggest that the 1360 cm -. i 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-' (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-I line. The disorder-associated line(D) exhibits a significant excitation-dependent shift from 1378 cm _ ' (457.9 nm Ar +) to 1330 cm ' (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, C&, and layer site symmetry, C,,,. Also the possible role of localized alkene-like structure in zones of structural distortion is considered.