As with other gaseous analytes, so also with ammonia, PANI, blended with other polymers and in metal oxide composites has been applied as a conductometric sensor material with ensuing linear ohmic response [19–21]. Highly sensitive NH3 sensors have been recently reported wherein PANI nano grains and metal oxides could serve as p and n type semiconductive surfaces respectively. The current flow through the heterojunction provided the numerical calibration of NH3 concentration [22]. Thin films of PANI have been either deposited or grown on polyethylene substrates or modified silicon substrates and studied as optical or chemiresistor sensors, with good results [23,24]. Studies on the NH3 response
Of SnO2 intercalated PANI nanocomposites have shown that the resistance of the PANI film vis-a-vis the intercalated nano composite, move in diametrically opposing directions with exposure to NH3 [25]. Dodecylbenzenesulfonic acid (DBSA) doped PANI films deposited on a variety of surfaces have been linearly calibrated as conductometric sensors for ammonia [26]. Cyclic voltametric studies have been carried out on PANI redox processes leading to its application as an ammonia sensing tool [27].
As with other gaseous analytes, so also with ammonia, PANI, blended with other polymers and in metal oxide composites has been applied as a conductometric sensor material with ensuing linear ohmic response [19–21]. Highly sensitive NH3 sensors have been recently reported wherein PANI nano grains and metal oxides could serve as p and n type semiconductive surfaces respectively. The current flow through the heterojunction provided the numerical calibration of NH3 concentration [22]. Thin films of PANI have been either deposited or grown on polyethylene substrates or modified silicon substrates and studied as optical or chemiresistor sensors, with good results [23,24]. Studies on the NH3 response
Of SnO2 intercalated PANI nanocomposites have shown that the resistance of the PANI film vis-a-vis the intercalated nano composite, move in diametrically opposing directions with exposure to NH3 [25]. Dodecylbenzenesulfonic acid (DBSA) doped PANI films deposited on a variety of surfaces have been linearly calibrated as conductometric sensors for ammonia [26]. Cyclic voltametric studies have been carried out on PANI redox processes leading to its application as an ammonia sensing tool [27].
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