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. 2022 Mar 21;1205:339739. doi: 10.1016/j.aca.2022.339739

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Fig. 1 — A) Cyclic voltammograms at a scan rate of 50 mV/s and B) Nyquist plot at 50 kHz to 0.05 Hz frequency range and 10 mV amplitude (inset is the Randles equivalent circuit) for each modification step recorded in 5 mM [Fe(CN)₆]^3-/4-/KNO₃ redox probe. The bare electrodes are in the insets of both figures.