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Characterizations of rGO films prepared with mixed LGO and SGO at different ratios. All rGO film prepared with HI acid as reductant. (a) XPS spectra; (b) Raman spectra; (c) dependence of C/O and ID/IG ratios of rGO films on LGO percentage used in the film preparations. All error bars represent standard error of mean, n = 3. The solid line in (c) represents a linear regression fit. (d) Correlation between C/O ratio and Raman ID/IG ratio.
