Fig. 9From: Facile Synthesis of Hierarchical Tin Oxide Nanoflowers with Ultra-High Methanol Gas Sensing at Low Working Temperaturea Dynamic response of gas sensor based on HTONF annealed at different temperatures during eight cycles of exposure to 100 ppm methanol at 200 °C. b The long-term initial resistance stability of HTONF sensor annealed at different temperatures to 100 ppm methanol in dry air at 200 °CBack to article page