Abstract
ZnO/CdS and ZnO/CdS-EDTA nanostructured thin films were prepared on a glass substrate using spin-coating and used for oxygen gas sensor applications. The structural properties of both ZnO/CdS and ZnO/CdS-EDTA nanostructured composites were comparatively characterized. The nanostructure thin film was found in a hexagonal structure with an average crystallite size reduced from 77 nm to 29 nm due to the influence of the EDTA. The optical absorption, photo luminescence, functional groups and surface morphology of the nanostructured thin films were comprehensively investigated. Oxygen was suitably tailored to verify the sensor response over a concentration range of 10–50 ppm at room temperature. Thus, the sensor studies reveal that the performance, response, and recovery time were enhanced in ZnO/CdS-EDTA nanostructured thin film compared with ZnO/CdS.
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Acknowledgement
One of the authors (A. Karthik) acknowledges the Senior Research Fellowship (SRF) (08/570(0002)/2013)-EMR-I by the Council of Scientific and Industrial Research (CSIR), New Delhi, to carry out this research project.
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Arunraja, L., Thirumoorthy, P., Karthik, A. et al. EDTA-Decorated Nanostructured ZnO/CdS Thin Films for Oxygen Gas Sensing Applications. J. Electron. Mater. 45, 4100–4107 (2016). https://doi.org/10.1007/s11664-016-4629-8
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DOI: https://doi.org/10.1007/s11664-016-4629-8