954324.fig.002a
(a)
954324.fig.002b
(b)
954324.fig.002c
(c)
954324.fig.002d
(d)
Figure 2: (a) UV-Vis spectra of GO dispersion in ethanol/water before and after γ-irradiation; (b) FT-IR spectra of starting GO and RGO measured on transmission mode as thin paper form; XPS C1s spectra of (c) starting GO and (d) RGO obtained by irradiating 34 kGy in 70% ethanol/water at 2 kGy/h under N2 atmosphere.