اصطناع محس كيميائي من البولي بيرول و توصيفه-تأثير الشائبة (SDBS)‎ على حساسيته

الملخص EN

A chemical sensor was prepared by deposition of polypyrrole films by chemical polymerization of pyrrole at room temperature, using hexahydrate ferric chloride as oxidant, on a ceramic substrate placed on the bottom of the beaker (in-situ polymerization).

On the substrate two interdigitated metallic electrodes were priory deposited by screen printing, to reduce film resistance.

These films were characterized by different methods namely FTIR, UV-Vis, XRD.

Electrical measurement showed the semiconducting nature of these films, as expected.

Sensors showed good sensitivity towards methanol, ethanol and ammonia.

On the other hand, SDBS dopant introduction enhanced sensor sensitivity towards all of these analytes.

Finally, sensitivity decreased with sensor temperature increase in the range between 25oC and 70oC.