Vibrational dynamics and structure of graphitic amorphous carbon modeled using an embedded-ring approach

Raman spectroscopy study of the transformation of the carbonaceous skeleton of a polymer-based nanoporous carbon along the thermal annealing pathway

“…Theoretical studies [28,29] have indicated that structural details of carbon materials are also carried in other parts of the Raman spectrum. Of interest here are those that have been experimentally observed for disordered carbons and are thought to be related to defects, namely the D' [22,[30][31][32][33][34], A [35][36][37][38][39][40][41] and TPA [40][41][42] bands.…”

Raman spectra of partially oriented sp2 carbon films: Experimental and modelled

“…opposite to that expected for the kinked graphene ribbon model, being much stronger in //-// than X-X. Doyle and Dennison [22] suggest that these peaks may be associated with 5 and 7 membered rings, however, this contention by itself does not explain the observed polarisation dependence. Our Raman simulations, shown in Fig.…”

“…Our Raman simulations, shown in Fig. 9, suggest that peaks in the 1450 region may also be associated with linearly aggregated sixmembered rings; therefore, the appearance of the 1450 peak [22] cannot, prima facie, be taken as evidence of five-sided or seven-sided ''graphene'' rings. An orientational preference in the ribbons, and a resultant polarization dependence, is also much more plausible for extended linear structures, than for small 5-and 7-membered rings.…”

Surface enhanced Raman spectroscopy (SERS) of particles produced in premixed flame across soot threshold

“…Most of the sharp peaks can be attributed to PAH-like structural units [25,26]. Peaks at 1150 and 1450 cm À1 have been attributed to transpolyacetylene like structural units [27], but the peak at 1450 cm À1 has been also associated to five-sided or seven-sided graphene rings [28], or, instead, to linearly aggregated six-membered rings [26].…”