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. 2020 Jan 31;13(3):624. doi: 10.3390/ma13030624

Figure 4.

Figure 4

Scanning electron microscopy (SEM) images of carbon fiber before (a) and after coating with PPy by cyclic voltammetry (CV) (b) and galvanostatically (c), and with PPy deposited galvanostatically in the presence of 0.25 and 0.75 mg·L−1 GO (d,e), respectively.