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Journal of Materials Science: Materials in Electronics

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16-10-2020

Nanostructured CdO–ZnO composite thin films for sensing application

Authors: A. K. Sharma, S. S. Potdar, K. S. Pakhare, U. M. Patil, V. S. Patil, M. C. Naik

Published in: Journal of Materials Science: Materials in Electronics | Issue 23/2020

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Abstract

CdO–ZnO nanocomposites were synthesized by the facile SILAR method. In synthesis, 0.1 M Cd (NO₃)₂ and 0.1 M Zn (NO₃)₂ were used as sources of Cadmium and Zinc ions, respectively. The supersaturated solutions of Cd and Zn ions served as a cationic bath while 0.075 M NaOH as an anionic bath. To synthesize composite samples, the number of dipping is varied as 1:1, 1:2, and 1:3 concerning (CdO–ZnO). The XRD patterns of composite samples exhibit distinct peaks of ZnO and CdO, which clearly indicates the formation of CdO–ZnO nanocomposites in thin film form. The FE-SEM shows interlocked sheets with a thickness varies from ~ 30 nm to 300 nm for composites. EDAX mapping and XPS study, confirms that the obtained nanocomposite is actually composed of CdO and ZnO. The gas sensing behavior of CdO–ZnO is systematically investigated for 4 test gases under different operating temperatures and different gas concentrations. The maximum response of 52.04% is obtained for 24 ppm of Ethanol at a minimum operating temperature of 325 °C.

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Title: Nanostructured CdO–ZnO composite thin films for sensing application
Authors: A. K. Sharma
S. S. Potdar
K. S. Pakhare
U. M. Patil
V. S. Patil
M. C. Naik
Publication date: 16-10-2020
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 23/2020
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-020-04607-w

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