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Title: Effect of 8 MeV electron beam irradiation on the structural and optical properties of CeO{sub 2} nanoparticles

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. - Highlights: • Investigated effect of beam irradiation on CeO{sub 2} nanoparticles • Beam irradiation caused size reduction and surface modification. • It increases microstrain, decreases d-spacing and broadens XRD peaks. • It also modifies optical band gap, absorption, PL and Raman bands.
Authors:
;  [1] ;  [2] ;  [3] ;  [1]
  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)
Publication Date:
OSTI Identifier:
22403615
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 98; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION SPECTRA; CERIUM OXIDES; CRYSTAL STRUCTURE; ELECTRON BEAMS; IRRADIATION; MEV RANGE; NANOPARTICLES; OPTICAL PROPERTIES; PARTICLE SIZE; PHOTOLUMINESCENCE; PHYSICAL RADIATION EFFECTS; PRECIPITATION; RAMAN SPECTRA; RAMAN SPECTROSCOPY; SURFACES; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET RADIATION; X-RAY DIFFRACTION