Figure 2

(a) Raman spectra for the drop casted film of the as grown GO sample. The D and G peaks are marked. The slight hump in the wavenumber range 2550–2780 cm⁻¹ corresponds to the 2D peak. The inset in panel (a) shows the powder x-ray diffraction data for the dried as grown sample. It shows the characteristic peak corresponding to GO. The bottle marked P shows the dispersed GO sample whereas the bottle marked Q contains the reaction mixture just prior to adding H₂O₂ to terminate the reaction used in our process. (b) FTIR spectra for the dried as grown GO sample obtained in the transmittance mode. The bands and dips corresponding to various functional groups are marked. The inset in panel (b) shows the UV-Vis spectra for the as grown GO sample dispersed in de-ionised water. The region enclosed by the square (dotted lines) is characteristic feature corresponding to GO.