367872.fig.001a
(a)
367872.fig.001b
(b)
Figure 1: (a) Three cyclic voltammograms (numbered) for in situ-generated p-nitrophenyl diazonium salt (p-NP) at gold electrode in acidic solution, HCl (0.5 M), scan rate 100 mV/s. (b) Five successive cyclic voltammograms (numbered) of p-nitrophenyl-modified gold electrode in 0.1 M KCl; scan rate 100 mV/s.