Fig. 4From: Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal a Response of the ZnO-CuO mesocrystal-based sensor towards 100 ppb H2S and 1000 ppm H2, CO2, CO, NO2, acetone, and NH3 at 125 °C. b Response change of a sensor during three successive cycles of exposure to 100, 200, and 500 ppb H2SBack to article page