Looking at the Figure by Ott and Ferrari we can see that graphite and pristine graphene have the same peaks with differences in intensity and presence of shoulders. Here in our Figure , we propose a sketch accordingly. According to , in graphene, "the Stokes phonon energy shift caused by laser excitation creates two main peaks in the Raman spectrum: G (1580 cm -1 ), a primary in-plane vibrational mode, and 2D (2690 cm -1 ), a second-order overtone of a different in plane vibration, D (1350 cm -1 ) . D and 2D peak positions are dispersive (dependent on the laser excitation energy) ." As stressed by Childres and coworkers, the given positions are for spectra excited by a 532 nm laser. Due to the presence of interactions between the layers of AB-stacked graphene, "as the number of graphene layers increases, the spectrum will change from that of single-layer graphene", and therefore we have a "splitting of the 2D peak into an increasing number of modes" . Moreover, the G peak is subjected to a small red shift according to the increased number of layers . Consequently, in the case of AB-stacked graphene, the ratio of peak intensities, I2D/IG can be related to the number of layers, "as well as the position and shape of these peaks" .