Figure 2. ( a ) Photographs of PDMA E-CHEM films electrodeposited on stainless steel disks under various conditions (A ) − 0.2 to 0.85 V, 5 mV s − 1 , 10 scans; (B ) − 0.2 to 0.8 V, 5 mV s − 1 , 15 scans; (C) − 0.2 to 0.8 V, 15 mV s − 1 , 5 scans; (D ) − 0.2 to 0.8 V, 10 mV s − 1 , 10 scans. Cyclic voltammogram for ( b ) typical PDMA E-CHEM synthesis (scan rate 5 mV s − 1 ) and ( c ) associated voltammogram for the electrochemical demethylation process (scan rate 1 mV s − 1