SENSORS

摘要

There is disclosed a chemiresistor which comprises a non-conducting substrate at least partially coated with an electrically-conductive polypyrrole film, characterised in that the said substrate is a high melting-point, thermoplastic polymer selected from: an aromatic polyetherketone, a polyethersulphone, a polyetherimide, a polyimide and a polyamide. Also disclosed is a method of polymerizing a pyrrole monomer, comprising the step of contacting said pyrrole monomer with an oxidising agent in an aqueous solution, wherein the aqueous solution comprises an organic co-solvent which is at least partially miscible with water. There is also disclosed a process for treating a chemiresistor comprising a non-conducting substrate at least partially coated with an electrically-conductive polypyrrole film, wherein an oxidising agent or an acidic agent is contacted with the surface of the said film.