Figure 5 e Cyclic voltammograms of DSNPs-GCE (at 100 mV/s) in a phosphate buffer solution (0.10M) at different pH level
(range, 2.0 e12.0). The inset shows the plot of the formal potential, E0′, versus the pH. DSNPs-GCE ¼ delphinidin silver
nanoparticles modified glassy carbon electrode