Zinc oxide(ZnO) in nanostructure has the feature to adsorb great amount of gas in order to form a certain kind of surface state.The electronic conductivity of ZnO nanorod experiences a considerable change during the process of adsorption.In this work

gas sensor was fabricated from ZnO nanorod arrays prepared via a facile hydrothermal decomposition on Indium Tin Oxide(ITO) glass.The ZnO nanorods show very good crystalline characterized by Scanning Electronic Microscopy(SEM)

X-Ray Diffraction and High Resolution Transmission Electronic Microscopy(HRTEM).It was found that the sensor show sensitive response to the introduction of CO of 1.25 mg/Lat 200℃ with a sensitivity factor(S) of 18.It would be desirable that even better sensitivity be achieved by means of enhancement of the ZnOcrystalline structure and improvement of the surface reaction efficiency.More importantly

this is a simple cheap approach to manufacture gas sensors with nice environment-friendly.It would probably turn out to be an economic way to produce gas sensors in a large scale with low cost to meet the industrial requirements.