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Raman characteristics of nanoscrolls including the G-peak, the D-peak and new bands in the low-wavenumber region are discussed. Distinct peaks at ∼450cm −1 , ∼600cm −1 , ∼690cm −1 and ∼870cm −1 are identified to originate from transverse optic and transverse acoustic phonon branches at the K-point, the M-point and the Γ-point. The Raman spectrum of nanoscrolls is compared...
Characteristics of the Raman spectrum from carbon onions have been identified in terms of the position of the G peak and appearance of the transverse optic phonon peaks. Five new peaks were observed in the low wavenumber region, at about 1100, 861, 700, 450 and 250 cm -1 . The origins of these peaks are discussed in terms of the phonon density of states (PDOS) and phonon dispersion curves...
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