The oxidized and reduced states of PANI films, including the effects of the dopants and electrolytes, have been extensively studied. Sarac et al. have studied aniline (ANI), 
which has been electropolymerised by the CV method on three different electrodes: Pt, glassy carbon (GC), and CFME in acid aqueous solution (0.5 M H2SO4).
Bhattachrya et al. have investigated PANI using gas sensors and corrosion protective coatings. The applicability of PANI as an ion-exchange resin and conducting polymer has attracted considerable scientific interest in recent decades due to its good combination of properties, such as diverse structure, thermal and radiation stability, low cost, ease of synthesis, and conducting properties. 
This resulted in its application to different fields, such as micro-electronics,
corrosion protection, sensors and electrodes for batteries