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. 2019 Apr 17;6(12):1802136. doi: 10.1002/advs.201802136

Figure 1.

Figure 1

Fabrication and characterization of the RGO substrate. a) Schematic diagram of the synthetic preparation of RGO substrates. b‐i) A macroscopic picture of the substrate obtained from panel (a); ii–iv)SEM images of the RGO substrates with different magnifications (ii: 1000 ×; iii: 15 000 ×; iv: 60 000 ×). Scale bars: 1 cm in (i), 40 µm in (ii), 3 µm in (iii) and 500 nm in (iv). c) The RGO substrates with pore sizes of 50 µm (i), 30 µm (ii) and 15 µm (iii) were confirmed by SEM. Scale bars: 50 µm in (i,ii) and 30 µm in (iii). d) The X‐ray diffraction pattern analysis of RGO‐50, RGO‐30, and RGO‐15 substrates. e) The conductivities of RGO‐50, RGO‐30, and RGO‐15 substrates, and GO film used as a control. ** p < 0.01 and *** p < 0.001.