Design of selective layers for solid state electrochemical gas sensors

Conducting polymers offer a possibility for developing material properties that are critical to the sensitivity, selectivity and fabrication of potent iometric solid state gas sensors. The formation of charge transfer complex between the gaseous species and the semiconducting material results in chem ical modulation of the work function of the polymer. Methods of primary dop ing of the conducting polymers that lead to a stable and adjustable value o f the work function will be discussed using polyaniline as an example.