Selective Sensory Multilayer Structures Based on Tin and Manganese Oxides

This paper highlights the possibility of creating a multilayer sensor structure based on nonstoichiometric tin oxide as a sensitive layer and manganese oxide as a filter layer. The structure and morphology of the layers of tin and manganese oxides were characterized by scanning electron microscopy. The processes occurring on the surface of the sensor structure in interaction with molecules of analytic gases (nitrogen dioxide and hydrogen sulfide) have been studied via X-ray photoelectron spectroscopy. The conducted gas sensitivity experiments revealed a sectional sensitivity to the hydrogen sulfide structure and complete absorption of nitrogen dioxide molecules.