Fig. 12From: Ag Nanoparticles Sensitized In2O3 Nanograin for the Ultrasensitive HCHO Detection at Room TemperatureXPS spectra of 5%Ag-In2O3 (a) and pure In2O3 (b) in the vicinity of O1s. Dynamic resistance transition characteristics of the 5%Ag-In2O3 (c) and pure In2O3 (d) toward 40 ppm of formaldehyde at 30 °CBack to article page