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

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2014.11.004· OSTI ID:22403615

Babitha, K. K.; Priyanka, K. P. ^[1]; Sreedevi, A. ^[2]; Ganesh, S. ^[3]; Varghese, Thomas ^[1]

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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)

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.

• OSTI ID: 22403615
• Journal Information: Materials Characterization, Vol. 98; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

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