915090.fig.006a
(a)
915090.fig.006b
(b)
Figure 6: Ionic perm-selectivity of PPy film. (a) PPy film with anionic perm-selectivity, in which small-sized anions are doped in PPy and (b) PPy film with cationic perm-selectivity, in which large-sized anions are doped in PPy film.