Chemiresistive response of SnO2 thin films during adsorption of alcohols and ketones
Alexander A. Petrunin1, Olga E. Glukhova1,2.
1. Institute of Physics, Saratov State University, Saratov
2. Laboratory of Biomedical Nanotechnology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
Abstract
In this report we performed in silico calculations of electrical conductivity of quasi-2D SnO2 thin films with a (110) surface–prospect material for sensitive element of gas sensors. Electronic structure, charge transfer and chemoresistive response of quasi-2D SnO2 thin films during adsorption of alcohol molecules (ethanol, methanol, isopropanol and butanol) and ketones (acetone, cyclopentanone and cyclohexanone) were calculated. It was found that the electrical conductivity of quasi-2D SnO2 thin films decreases within 4–15% during adsorption of analytes. The influence of temperature on the concentration of analytes on the surface of quasi-2D SnO2 thin films was explored in dependence on analyte’s type.
Keywords: SnO2; thin films; DFT method; chemoresistive response; gas sensors; Langmuir isotherm model
Speaker
Alexander A. Petrunin
Institute of Physics, Saratov State University, Saratov
Russia
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