SnO₂ microrods based triethylamine gas sensor

Abstract

Abstract Triethylamine (TEA) gas sensor having high response and stability are in great demand in the actual working environment. In this paper, SnO 2 microrods are prepared on SiO 2 (300 nm)/Si substrate by thermal evaporation. The SnO 2 microrods-based gas sensor is successfully prepared. The gas response and stability of the sensor are tested at an optimal temperature of 200 °C. When the sensor is exposed to 100 ppm TEA gas, the response time is only 4 s. The detection limit is below 1 ppm. The gas-sensing mechanism is further discussed.