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. 2022 Mar 17;12(6):987. doi: 10.3390/nano12060987

Figure 3.

Figure 3

(A) Cyclic voltammograms of ferrocyanide 1 mM in KCl 100 mM on the bare screen-printed carbon electrode (SPCE) in black, on the SPCE modified with AuNPs by drop-casting in green and on the SPCE modified with electrogenerated AuNPs in red. (B) Nyquist plots recorded using the redox probe [Fe(CN)6]4−/[Fe(CN)6]3− 2 mM each, KCl 3 mM in PBS at unmodified SPCE (black, Rct = 614.44 Ω), modified with AuNPs deposited by drop-casting (green, Rct = 372.85 Ω) and modified with electrogenerated AuNPs (red, Rct = 172.95 Ω).