Fig. 7From: Facile Synthesis of Wormhole-Like Mesoporous Tin Oxide via Evaporation-Induced Self-Assembly and the Enhanced Gas-Sensing Propertiesa Response of the mesoporous SnO2 sensors to 200 ppm of ethanol as a function of the relative humidity at 200 °C. b Long-term stability of the SnO2-400 °C sensor to 200 ppm ethanol at 200 °CBack to article page