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. 2017 Jan 31;7:41891. doi: 10.1038/srep41891

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(a) Raman spectra of graphene nanosheets after plasma treatment, (b) Raman spectra of the plasma-treated graphene nanosheets after thermal reduction, (c) The intensity ratios between D peak and G peak of graphene nanosheets after plasma treatment and plasma-treated graphene nanosheets after thermal reduction as a function of plasma treatment time. Where PLA and TR represent plasma treatment and thermal reduction respectively, and the numbers after PLA and TR represent the plasma treatment time (s). The values of I_D/I_G are concluded in Table S1.