13 bonds due to the presence of oxygenated functionalities. 42,46 The π-π* peak red-shifted to 267 nm upon reduction to graphene with hydrazine and the absence of n-π* transitions at 310 nm indicates the removal of the oxygen functionality from GO after reduction by hydrazine. In GO-ODA, the π-π* transitions of graphitic C=C bonds shifted to 266 nm, and n-π* transitions of C-O bonds completely disappeared similar to graphene indicates the simultaneous formation of RGO and functionalization with ODA molecules. Fig 1: (a) FT-IR transmittance spectra of GO, GO-ODA, Graphene, (b) UV-Visible absorption spectra of GO and graphene in water and GO-ODA chloroform medium, (c) Raman spectra of GO, GO-ODA and graphene.Raman spectroscopy is a powerful nondestructive tool to distinguish order and disorder in the crystal structure of materials as Raman scattering is strongly dependent upon its electronic structure. The crystal structure of graphite is altered during the oxidation process of graphite to graphite oxide. However, the reduction process of GO to graphene and GO-ODA partially restored the ordered crystal structure and also repaired few of the structural defects in the