XRD patterns of the products obtained from zinc nitrate and copper nitrate as the mixed precursor by annealing at 200 and 250 °C. Figure S2. Dynamic response curves of the ZnO-CuO mesocrystal-based sensor responding to 1000 ppm NO2, H2, CO2, CO, acetone and NH3 at 125 °C. Figure S3. The responses of the ZnO-CuO mesocrystal based sensor upon exposure to air with different relative humidity relative to air with RH of 20 % at 125 °C. (DOCX 198 kb
