Publication

Abstract : ZnO thin film was deposited on to the preheated glass substrates by spray pyrolysis technique. The polycrystalinity and the hexagonal structures were observed from the X-ray diffraction pattern and the variation in lattice constant was also being reported. The average crystallite size was found to be 30 nm to 35 nm. The morphological studies confirmed the formation of ZnO nanorods. From optical studies, the band gap was found to be ~3.32 eV. The room temperature vapour response was studied for different volatile vapours by chemiresistor method. It was observed that the film had a good response towards ethanol vapour under the exposure of light. The sensing mechanism, sensitivity and response-recovery profile as a function of ethanol concentration were studied and reported.