Figure 4

Cyclic voltammograms of PPCL papers prepared with co-vapors: (a) methanol, (b) ethanol, (c) water, (d) hexane, (e) toluene, (f) benzene and (g) none.
Insets: Plots of the peak current (the anodic peak current, Ipa; the cathodic peak current, Ipc) vs. the scan rate extracted from the cyclic voltammograms.