Optically Detected Effect of Size on the Oxygen Vacancies Concentration in Cerium Oxide  Nanocrystals

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Title	Optically Detected Effect of Size on the Oxygen Vacancies Concentration in Cerium Oxide Nanocrystals
Authors	Maksimchuk, P.O. Masalov, A.A. Malyukin, Yu.V.
ORCID
Keywords	Luminescence spectroscopy Cerium oxide nanoparticles Oxygen vacancies
Type	Article
Date of Issue	2014
URI	http://essuir.sumdu.edu.ua/handle/123456789/37220
Publisher	Sumy State University
License	Copyright not evaluated
Citation	Proc. NAP 3, 02NAESF05 (2014)
Abstract	In this work effect of the size on the oxygen vacancies concentration in cerium oxide nanocrystals have been investigated by means of luminescence spectroscopy techniques. For determination of changes of oxygen stoichiometry intensity of 5d-4f luminescence of Ce3+ ions were used. It was shown that for CeO2 nanocrystals decrease of the size from 50 nm to 2 nm manifests itself in 8 times increase of the band intensity associated with vacancy-stabilized Ce3+ ions. The same effects have been observed at atmosphere variation from oxidizing to reducing and are connected with significant increase of concentration of oxygen vacancies. Obtained results allow to determine that decrease of the size stimulate formation of oxygen vacancies in cerium oxide nanocrystals.
Appears in Collections:	Наукові видання (ЕлІТ)