P1FW.1 - Highly ammonia-sensing using direct in situ electrodeposited polypyrrole-dodecylbenzene sulfonic acid film on ITO coated flexible substrates.
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-1 - Flexible, Stretchable and Wearable Sensors
- A. Mekki, F. Merdj, D. Guettiche, B. Mettai - Ecole Militaire Polytechnique, Alger (Algerie)
- 510 - 511
Air quality monitoring is of major concern, as it is directly linked to public health. It requires the development of high sensitive devices with fast response towards hazardous gas and volatile compounds. Such performances depend on the nature and quality of deposition of the sensing layer. Herein, adherent Polypyrrole-dodecylbenzene sulfonic acid (PPy DBSA) films were deposited on N-(3-trimethoxysilylpropyl) pyrrole modified ITO coated polyethylene terephthalate (PET) flexible substrate by facile direct electrochemical oxidation of pyrrole in an aqueous solution of dodecylbenzene sulfonic acid (DBSA). Chemiresistive gas sensing tests have demonstrated selectivity and sensitivity of films toward ammonia vapors over the other vapors (nitrogen dioxide, carbon dioxide, hydrogen sulfide, acetone, methanol and ethanol) with higher response at 20 ppm, reasonably fast response time of 3 min and reaching detection limit of 3ppm. The response of the sensor could be related to the strong electrostatic interactions between vapor molecules and the dopant agents within PPy films.