The plot suggests the gradually decreasing lateral dimension of the exfoliated graphene for up to 1 week of incubation. The obtained pattern was found to be in agreement with the changes observed in the lateral dimension of the layers from AFM micrographs (Supplementary Fig. (e)). The FWHM value for the G band suggested the formation of exfoliated structure as higher GFWHM corresponds to increased interlayer spacing (d002). The presence of oxygen containing functional groups in C 1s spectra due to the yeast cells in the graphene suspension.