Abstract
Ceria thin films are deposited on quartz substrates at various substrate temperatures (923–1073 K) with optimized deposition parameters by using pulsed laser deposition technique. Prepared thin films are characterized by X-ray diffraction (XRD), atomic force microscopy, Raman spectroscopy and transmission UV–Vis spectroscopy to study the effect of substrate temperature. The XRD studies reveal the polycrystalline nature of CeO2 thin films. The preferred orientation is observed along (111) plane. The atomic force microscopy studies show the formation of uniform and dense nanocrystallites with smooth surface morphology. The RMS roughness of the thin film is increased with the increase of substrate temperature. The formation of CeO2 with cubic structure is confirmed with Raman peak appeared at 463 cm−1 due to the F2g active mode. The optical transmission studies reveal that the optical band gap decrease with increasing the substrate temperature. Acetone gas sensing characterization has been carried out at elevated temperatures.
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Acknowledgments
One of the author M. V. Ramana Reddy thanks DST PURSE (O.U) for providing financial assistance for this work. One of the author P. Nagaraju would like to thank Dr. Vasant Sathe, Dr. V. R. Reddy, Dr. V. Ganesan, Dr. U. P. Deshpande, IUC Indore, for providing facilities and their valuable suggestions. They also express sincere gratitude to Ch. Gopal Reddy, Chairman, Dr. A. Raji Reddy, Director, CMR Technical Campus for their encouragement during the present work.
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Nagaraju, P., Vijayakumar, Y., Phase, D.M. et al. Microstructural, optical and gas sensing characterization of laser ablated nanostructured ceria thin films. J Mater Sci: Mater Electron 27, 651–658 (2016). https://doi.org/10.1007/s10854-015-3801-x
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DOI: https://doi.org/10.1007/s10854-015-3801-x