On the reverse scan, the working electrode returns to potentials where the oxidation of FcMeOH is no longer possible, resulting in both signals returning to baseline values. The fluorescent signal is delayed which indicates that the fluorophore lingers in the reporting cell after the current is passed. and suggests that the issue is more prominent as time increases. The same phenomenon can be observed during a pulsed amperommetric detection experiment (Figure ), in which fluorescence is observed at longer time-scales than the pulse length. The implication here is that the fluorescence produced on different time-scales cannot be accurately compared.