Figure 3.

(A) Nyquist plots corresponding to the aptasensor without AFM1 and after incubation with various AFM1 concentrations (see the legend). (B) plot of the relative changes of R_ct values vs. concentration of AFM1 (ΔR_ct/R_cto = (R_ct − R_cto)/R_cto, where R_cto, R_ct are charge transfer resistances without and with certain concentration of AFM1, respectively). Results represent mean ± SD from 3 independent experiments. Experiments were performed in working phosphate buffer containing 5 mM (1:1) [Fe(CN)₆]^3−/4− as a redox probe.