Study of the Influence of Different Synthesis Conditions of PANI-HF in its Property as Ammonia Gas Sensor

Abstract

ntrinsically Conducting Polymers (ICPs) are of increasing interest, especially in areas such as electronic devices. PANI is one of the most intensively investigated of the ICPs due to its easy chemical synthesis, easy doping process by protonic acids and also because it is chemically stable at room temperature conditions. PANI is used as sensor for many gases that are responsive for air pollution The applicability of these materials as sensors is based on their selectivity over a wide range of analyte molecules and low level of gas concentration, the potential to operate at or near room temperature and also its response time. The present work studies the influence of different synthesis conditions of PANI-HF in its electrical resistance when subjected to the presence of ammonia gas. The PANI-HF was chemically synthesized and it was submitted to electrical and physical characterization. The preview results showed that the synthesis conditions change significantly the response of PANI-HF to ammonia gas.