Optical sensors based on electrochromic conducting polymers

Conducting polymers have been widely applied in various sensing platforms. The application of conducting polymers in optical sensing systems is shortly overviewed and discussed in this paper. Some studies on pH, halide anions, heavy metal ions and gas sensors are presented along with their sensing characteristics and possible fields of application. Interactions that lead to a change in optical properties of conducting polymers and production of analytical signal for different analytes are explained briefly.