Research Article

Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study

Figure 2

Current/potential voltammograms obtained scanning at 100 mV/s between Ec = 0.04 V and either Ea = 0.9 V or Ea = 1.1 V. Pseudocapacitive response observed after five anodic cycles using (a) Ea = 1.2 V with = 20 s, and (b) Ea = 1.4 V with = 15 s. (a) and (b) in SDS solution free of Py, (c) the same electrode shown in Figure 2(a) and after immersion in 0.1 M KCl.