Effect of structure and surface state of nanocrystalline tin dioxide on its gas sensing properties

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