P1.7.9 Highly sensitive NO2 sensor based on monodispersed WO3 nanoparticles

Lu You, Fasheng Yang, Xinxin He, Yanfeng Sun & Geyu Lu
Monodispersed tungsten oxide nanoparticles were obtained by sintering the hydrothermally synthesized precursor. The size of particle can be controlled from 25 nm to 100 nm via adjustment the concentration of surfactant and annealing temperature. The thick film sensors based on as-prepared samples were fabricated and evaluated. The results manifested that the size of particle and sintered temperature had great influence on the sensing properties. The sensor had good repeatability and stability. The gas response to...