Optimization of the work function response of CO2-sensing Polysiloxane layers by modification of the polymerization

Gas sensors based on the work function read out of (hetero-) polysiloxane sensing layers can be used for the detection of CO₂. To investigate the reaction with CO₂, different polymers based on modified polysiloxanes are examined. It is shown that the sensitive layers can be systematically modified to evoke a preferred and specified chemical reaction with CO₂. This may open up the possibility for new ambient-temperature-CO₂-sensors, for which a fast response time, a high long-term stability as well as a high sensitivity between 400 ppm CO₂ (background in atmosphere) and 4000 ppm CO₂ (bad air) are characteristic.