GAS-SENSING PROPERTIES OF PHTHALOCYANINE LANGMUIR-BLODGETT-FILMS

Ideal microsensors would be cost effective, efficient, and stable, det ect low concentrations of a certain gas in a working environment, and be able to operate in real time, i.e., monitor continuously. Among the compounds being investigated for development into microsensors are th e phthalocyanines (Pcs), in particular in the form of thin films. The advantages and problems of Pc thin films are discussed, and the latest results for the detection of toluene and nitrogen oxides in air, incl uding the response and recovery times, are presented.