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. 2021 Mar 17;12(3):312. doi: 10.3390/mi12030312

Figure 7.

Figure 7

Nyquist plots represent the EIS measurement performed in the frequency range of 100 kHz–0.1 Hz, in a redox solution of 5 mM [Fe(CN)6]3−/4− containing 1 M KNO3 using CPE and MCPE for surface characterization. The inset figure is the equivalent circuit showing resistors and capacitor (c).