Development of NO2 sensor based on Ti modified ZnO nanowires

Abstract

Ti modified ZnO nanowires (NW) film has been demonstrated as an excellent Nitrogen Dioxide (NO2) sensor. Herein, Ti acts as a sensitizer to improve the sensor response, and response kinetics of ZnO NW towards NO2. The sensor exhibited an enhanced response (Rg/Ra) of 7 at an optimum operating temperature of 200oC. The observed sensing characteristics are corroborated with the finding of work function measurements using Kelvin Probe Technique.