Fig. 6From: Effect of Surfactants on the Microstructures of Hierarchical SnO2 Blooming Nanoflowers and their Gas-Sensing Propertiesa The response of the sensors to 100 ppm ethanol under different operating temperatures (180–360 °C). b The dynamic response curves of the sensors to ethanol with different concentrations (10–150 ppm) at 270 °C. c Response versus time curves of the sensors to 10–200 ppm ethanol consecutively at 270 °C. d Dynamic sensing transient of the sensors to 100 ppm ethanol at 270 °CBack to article page