Development of advanced gas-sensing devices based on the microstructural and compositional controls of various promising materials and their different operating mechanism

Abstract

Compositional and microstructural design technique s of various promising materials for advanced gas-sensing devices have been reviewed in this article. Strict controls of mesopores as well as macropores are achieved by utilizing self-assembly of kinds of surfactants and polymer microspheres as a template, respectively, and various interfaces of the gas-sensing materials were chemically modified, in order to optimize the gas reactivity and diffusivity. In addition, the temperature-modulation and light-driven operations of some kinds of gas sensors are quite effective in enhancing their gas sensitivity and selectivity. These novel approaches are quite instrumental in the further growth and development of various kinds of gas sensors.