Fig. 3
From: Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal
a Dynamic response curves of the ZnO-CuO mesocrystal-based sensor responding to 100 ppb H2S at different working temperatures, b plot of response versus time for a ZnO-CuO mesocrystal-based sensor upon exposure to H2S gas with concentrations ranging from 10 ppb to 10 ppm at 125 °C, c the corresponding calibration curve with error bar and a magnified image of the linear region (the red line is the linear fitting result), and d response time and recovery time with error bar