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. 2018 May 2;18(5):1400. doi: 10.3390/s18051400

Figure 4.

Figure 4

Layered structure model and SEM of r-GO: (a) schematic showing the layered structure model before pressure; (b) schematic illustrating the layered structure after pressure; (c) SEM image of the r-GO before pressure; (d) SEM image of the r-GO after pressure.