UV-activated ultrasensitive and fast reversible ppb NO2 sensing based on ZnO nanorod modified by constructing interfacial electric field with In2O3 nanoparticles

The poor recovery characteristic of NO2 sensors operated at room temperature is always a challenge to solve. In order to realize the combination of ultra-high response and fast response and recovery speed, heterogeneous interfacial electric fields are constructed by loading In2O3 nanoparticles on ZnO nanorods, which possess fast charge transfer ability, to improve the separation efficiency of photogenerated carriers. The sensing results show...