Abstract
Zinc oxide (ZnO) thin films have been deposited by a reactive dc magnetron sputtering technique onto a thoroughly cleaned glass substrate at room temperature. X-ray diffraction revealed that the deposited film was polycrystalline in nature. The field emission scanning electron micrograph (FE-SEM) showed the uniform formation of a rugby ball-shaped ZnO nanostructure. Energy dispersive x-ray analysis (EDX) confirmed that the film was stoichiometric and the direct band gap of the film, determined using UV–Vis spectroscopy, was 3.29 eV. The ZnO nanostructured film exhibited better sensing towards ammonia (NH3) at room temperature (∼30°C). The fabricated ZnO film based sensor was capable of detecting NH3 at as low as 5 ppm, and its parameters, such as response, selectivity, stability, and response/recovery time, were also investigated.
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Dhivya Ponnusamy, Sridharan Madanagurusamy Nanostructured ZnO Films for Room Temperature Ammonia Sensing. J. Electron. Mater. 43, 3211–3216 (2014). https://doi.org/10.1007/s11664-014-3253-8
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DOI: https://doi.org/10.1007/s11664-014-3253-8