Numerical analysis of recovery stage with disappearing polymer layer RR-P3HT for the detection of DMMP based on diffusion equations
Abstract
This document presents the results of numerical analyses of the
SAW gas sensor in the non-steady state. The effect of SAW
velocity changes depending on how the surface electrical
conductivity of the sensing layer is predicted. The conductivity of
roughness sensing layer above the piezoelectric waveguide or
quartz depends on the profile of the diffused gas molecule
concentration inside the layer. Numerical results for the profile
concentration gas DMMP (CAS Number 756-79-6) for layer
(RR)-P3HT in the non-steady state in recovery step are shown.
The main aim of the investigations was to study the thin film
interaction with target gases in the SAW sensor configuration
based on diffusion equation for polymers. The results of
numerical analyzes allow to select the sensor design conditions,
including the morphology of the sensor layer, its thickness,
operating temperature and layer type. The numerical results
based on the code written in Python, are described and analyzed.
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