Fig. 4: Moisture resistance of pure SnO and SnO -3Ni sensors.
From: NiO nanoparticle-decorated SnO2 nanosheets for ethanol sensing with enhanced moisture resistance

a The responses of the sensors based on pure SnO2 and SnO2-3Ni at humidity range from 20% to 80% RH; b EIS plots of the SnO2-3Ni sensor under different humidity conditions