Acetone sensors with high stability to humidity changes based on Ru-doped NiO flower-like microspheres

Humidity dependence of gas sensors is one of the main obstacles for practical application. Through Ru doping into NiO flower-like microspheres, which are synthesized by a one-step hydrothermal route, the gas sensors exhibit high stability to humidity changes. The sensors based on 0.5 at% Ru-doped NiO have almost the same responses to 100 ppm acetone at 200 °C when the relative humidity ranges from 15 % to 90 %. At the same time, they possess the...