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. 2018 Dec 26;10(1):13. doi: 10.3390/mi10010013

Figure 4.

Figure 4

(a) Preparation of graphene by chemical reduction of graphene oxide synthesized by Hummers’ method. Reproduced with the permission of Reference [98]. Copyright 2012, Royal Society of Chemistry. (b) SEM images of reduced graphene oxide-P (rGO-P) bilayer film deposited on undoped Si wafer. (c) High-resolution C 1s spectra of rGO-P bilayer film. (d) Ultraviolet–visible (UV−vis) transmittance spectra of GP bilayer film (I) and rGO-P bilayer film (II). Reproduced with the permission of Reference [43]. Copyright 2018, American Chemical Society.