Figure 3.
The SEM images of the surface morphologies of AuNPs/PEDOT(BSA)/Pt electrodes. (a–c): the electrodes were pretreated with −0.4 V, no treatment, and +0.4 V, respectively, in a PBS solution (pH = 6.2) for 10 min before being soaked in the AuNPs solution for 60 min; (d–f): the electrodes were pretreated with +1 V for 10 minutes before being soaked in the AuNPs solution for 10, 30, and 60 min, respectively.