Effect of 8 MeV electron beam irradiation on the structural and optical properties of CeO2 nanoparticles |
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| Affiliation: | 1. Nanoscience Research Centre (NSRC), Department of Physics, Nirmala College, Muvattupuzha, 686 661, Kerala, India;2. Department of Applied Science and Humanities, Thejus Engineering College, Thrissur, 680584 Kerala, India;3. Microtron Centre, Mangalore University, Mangalagangotri, 574 199 Karnataka, India;1. Department of Photonics and Communication Engineering, Asia University, Taichung, Taiwan, ROC;2. Department of Electronic Engineering, Chang Gung University, Kwei-Shan Tao-Yuan, Taiwan, ROC;1. Laboratoire d''Etude des Microstructures et de Mécanique des Matériaux (LEM3), UMR 7239, CNRS/Université de Lorraine, F-57045 Metz, France;2. Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (‘LabEx DAMAS’), Université de Lorraine, France;3. Laboratoire d''Informatique Théorique et Appliquée (LITA), EA3079, Université de Lorraine, 57045 Metz Cedex 1, France;4. Institut Jean Lamour (IJL), SI2M Dept., CNRS UMR 7198, Université de Lorraine, Parc de Saurupt, CS 50840, F-54011 Nancy Cedex, France;1. Department of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia;2. École Polytechnique de Montréal, Dép. de Génie Chimique, P.O. Box 6079, Centre-ville, Montreal, Quebec H3C 3A7, Canada |
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| Abstract: | The effect of 8 MeV electron beam irradiation on the structural and optical properties of cerium oxide nanoparticles was investigated. Ceria nanoparticles were synthesized by chemical precipitation method, and characterized by X-ray diffraction, transmission electron microscopy, ultraviolet–visible, photoluminescence and Raman spectroscopy. Ultraviolet–visible absorption spectra, photoluminescence and Raman spectra of beam irradiated samples were modified, and shifted to blue region, which were attributed to quantum size effect. Systematic observations found that nonstoichiometry, defects and size reduction caused by beam irradiation have great influence on optical band gap, blue shift, photoluminescence and Raman band modifications. Moreover, electron beam irradiation is a suitable technique to enhance the structural and optical properties of nanoceria by controlling the particle size, which may lead to potentially useful technological applications. |
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