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. 2019 Jan 21;9(1):130. doi: 10.3390/nano9010130

Figure 2.

Figure 2

Schematic illustration of 2D graphene film defined according to their oxidation functional groups: (a) GO; (b) RGO; 3D graphene architectures: (c) Photographs; (d) Scanning electron microscope (SEM) image; (e) Transmission electron microscope (TEM) images. Reproduced from [40] (a), with permission from The Royal Society of Chemistry, 2014; Reproduced from [37] (c,e), with permission from American Chemical Society, 2017; Reproduced from [38] (d), with permission from American Chemical Society, 2012.