Highly Sensitive SnO₂ (100) Nano-Crystal CH₃OH/C₂H₅OH Gas Sensor Operating at Different Temperatures: Monte Carlo Studies

Among semiconductor oxide gas sensors, tin oxide (SnO₂) is a well known n-type semi conducting oxide that has been widely used for the detection of a wide spectrum of oxidizing and reducing gases in an operating temperature range of 298–443 K. The sensitivity and selectivity of this film is tested to different reducing and oxidizing gases such as methanol and ethanol with different concentrations (25 wt%, 50 wt% and 75 wt%) and is excellent selectivity for CH₃OH/C₂H₅OH gas at a low operating temperature of 443 K. The structural and morphological properties this interaction is investigated in different distances CH₃OH and C₂H₅OH vapor related to SnO₂ (100). The calculations achieved by methods of Monte Carlo simulation in different temperatures. All the calculations were carried out using HyperChem 7.0 program package. The total energy increased with addition blends of alcohol molecules and temperature so the interactions between them are endothermic. The excellent sensitivity and selectivity of SnO₂ is at 443 K for blend of 75 wt% them in 7 Å distances.