Effect of Ammonia on the Resonance Properties of a Piezoelectric Resonator with a Lateral Electric Field–Chitosan Film Structure

The parameters of a resonator with a lateral electric field with a thin film of chitosan acetate and chitosan glycolate in an air–ammonia mixture have been studied. It is shown that when the ammonia concentration increases, the maximum value of the real part of the impedance and resonance frequency of the resonance peaks decrease significantly and recover in air. It is established that these effects are associated with an increase in the surface conductivity of the films in the presence of ammonia. In this case, the response and relaxation times for these chitosan films differ significantly.