ZnO crystalline nanowires array for application in gas ionization sensor

The air monitoring becomes daily necessity not only in industrial environment and in aerospace applications but also in a living milieu as a consequence of the gas pollution. For detection of gaseous pollutants gas sensors are employed. In this work the successful p-type and n-type ZnO nanowires (NWs) were accomplished during electrochemical deposition. P-type ZnO NWs doped with Ag dopant were achieved with omitted post annealing procedure. Also, the novel gas ionization sensor (GIS) with integrated p-type ZnO NWs as the anode is proposed. P-type ZnO NWs-based gas sensor´s characteristics compared with the gold NWs-based GIS, which was developed and reported by our group previously. It showed the comparable breakdown voltages in inert gas (Ar) atmosphere. P-type ZnO NWs-based GIS demonstrated good repeatability. The practical and low cost p-type ZnO NWs-based gas sensor presented in this article shows potential for future implementation in real world gas sensors´ applications.