Mass sensitive detection of carbon dioxide by amino group-functionalized polymers

A series of amino group-functionalized polymers was investigated as sensitive coatings for the detection of carbon dioxide in the gas phase by using quartz microbalance transducers. The sensor signals are reversible with response and decay times in the order of minutes at operating temperatures between 25°C and 70°C. The long term stability and the cross sensitivities to other gases are also discussed.