Good environmental stability, a high degree of processability, and interesting redox properties associated with its chain heteroatom due to this polyaniline (PANI) have been one of the most extensively studied conducting polymers from the last few years. The chemical and electrochemical processes can be used to synthesize PANI. This chapter mainly focused on physiochemical properties of PANI thin films such as conducting properties, optical properties, magnetic properties, electrical and dielectric properties, mechanical properties, crystalline nature, capacitive properties, sensing properties, charge-discharge properties, thermoelectric properties, redox properties, antioxidant properties, anticorrosion properties, etc.
