Effect of structure and surface state of nanocrystalline tin dioxide on its gas sensing properties
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Abstract
Effect of particle size, concentration of structural defects and the presence of sulfite and sulfate groups on the response of thick-film SnO2 sensors to CH4 and CO were revealed. Particle size and the presence of SO-groups were found to be main parameters determining the sensitivity of SnO2-based sensors to CH4, while structural defects of SnO2 layers are essential for CO detection