The size and strain effects on the Raman spectra of Ce1-xNdxO2-delta (0 LT = x LT = 0.25) nanopowders
Popović, Zoran V.
Bošković, Snežana B.
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Ultrafine Ce1-xNdxO2-delta (x = 0-0.25) powders were synthesized by self-propagating room temperature synthesis. Raman spectra were measured at room temperature in the 300-700 cm(-1) spectral range. The shift and asymmetric broadening of the Raman F-2g mode at about 454 cm(-1) in pure and doped ceria samples could be explained with combined size and inhomogenous strain effects. Increased concentration of O2- vacancies with doping is followed by an appearance of new Raman feature at about 545 cm(-1). (c) 2005 Elsevier Ltd. All rights reserved.
Кључне речи:CeO2 / doped nanopowders / SPRT synthesis / Raman scattering / confined phonons
Извор:Solid State Communications, 2006, 137, 7, 387-390
ISSN: 0038-1098 (print)