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(a) Raman spectrum of graphite, graphene oxide, and electrochemically reduced graphene oxide (ErGO); (b) FTIR spectrum of ErGO, PEDOT:PSS, and ErGO/PEDOT:PSS composites, (c) SEM image of ErGO, (d) SEM image of ErGO/PEDOT:PSS, (e) elemental mapping of C, O, and S in ErGO, and (f) elemental mapping of C, O, and S in ErGO/PEDOT:PSS.
