Fig. 3. A cyclic voltammogram (bottom panel) of a gold electrode in a 0.1 M NaClO4 solution (pH 4.8) containing 6.6 mM of a 1 : 1 mixture of Cu(OTf)2 and DAT performed at a scan rate of 100 mV s–1. The measurement was combined with a quartz crystal microbalance experiment (top panel). For clarity, only the first two scans are shown in (a) whereas (b) shows the full measurement of 30 scans.
