Preliminary Study of the Interaction of Metal Nanoparticle-containing Poly-p-xylylene films With Ammonia

Abstract

The interaction of metal particles encapsulated in poly-p-xylylene films and the gas phase NH ₃ molecules has been studied. It has been found that in the presence of NH ₃ the resistivity of the lead-containing samples could be reversibly changed by a factor of 6–8 within a few seconds. As a result, it is suggested that these materials could be used as sensors for ammonia detection in the gas phase. The response and recovery times, temperature dependence, and long-term stability of these sensors have been examined.