The nerve agent simulant dimethylmethylphosphonate(DMMP) has been tested with this piezoelectric sensor devices coated with nanosize ZSM-5 zeolite films.The zeolite has been often utilized as the gas sensing material for its molecular sieving properties
but there is seldom report on nerve gas detection based on this material because the never gas is the strong polar molecule.Therefore
a new type of ZSM-5 nano-zeolite especially sensitive to DMMP is synthesized and deposited on two mass sensor quartz crystal microbalance(QCM) and the difference frequency has been examined to reduce outside interference.The desorption method has been developed by using alternant electric field.Volume fraction of DMMP gas is 1×10
-6
.The response time of absorption and desorption is 20 s and 90 s respectively.