Fig. 2.

Electrode surface area studies before and after electrode modifications using 0.5 mM Fc-MeOH in 0.1 M TEAP vs Ag/AgCl (0.14M NaCl); (A) Cyclic voltammograms at different scan rates (from 10 to 200 mV/s) for bare electrode; (B) peak current (I_p) vs. square root of the scan rate (ν^1/2)for bare electrode; (C) I_p vs. ν^1/2 for rGO coated electrode; (D) I_p vs. ν^1/2 for AuNP electrode; (E) I_p vs. ν^1/2 for chitosan electrode. (Error bars = standard deviation, n=8)