A love-wave gas sensor coated with functionalized polysiloxane for sensing organophosphorus compounds

Love-wave devices based on quartz piezoelectric substrate and SiO2 guiding layer coated with a specific polysiloxane polymer are used to detect organophosphorus compounds. This allows to study affinities of the polysiloxane polymer coating towards organophosphorus compounds, and to demonstrate the high sensitivity of love-wave devices for gas detection. We also present a theoretical model which describe wave propagation in love devices and allow to design optimized structures. Then, we discuss experimental results, in terms of interactions between sensor and vapor and in comparison to SAW results.