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(a) Schematic image illustrating the formation of a freestanding RGO paper. (b) Fabrication process of GO film by the printing method. (c, d) Peeling GO film from the printing paper with the bubbling delamination method in 1 M HCl (since HI is dark colored, we used HCl instead to illustrate this process). (e) Photograph of large-scale RGO paper. (f) Photograph of RGO paper with excellent flexibility. (g) Photograph of RGO, PANI/RGO and RGO/PANI/RGO paper.
