Figure 5.

Cyclic voltammograms of: AuNPs (A); and rough-surfaced AuPt alloy nanoparticles (B) modified micorelectrode sites in 0.1 M KCl solution containing 2 mM [Fe(CN)₆]^3−/4−. Scan rate: 50, 100, 150 and 200 mV/s. (C) Plots of linear relationship between anodic peak currents (${\mathrm{I}}_{\mathrm{pa}}$) and square root of the scan rates. (D) Cyclic voltammograms of bare Au microelectrode site, AuNPs and rough-surfaced AuPt alloy nanoparticles modified micorelectrode sites in 2 mM [Fe(CN)₆]^3−/4− at scan rate of 200 mV/s.