Structural XANES characterization of Ca0.99Sm0.01TiO3 perovskite and correlation with photoluminescence emission
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
06/11/2013
06/11/2013
2012
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| Resumo |
In this work, CaTiO3:Sm (CT:Sm) were prepared by a soft chemical processing at different annealing temperatures starting with a disordered structure and reaching an ordered one, with the propose to understand the relationship between structural order-disorder and photoluminescence emission. The samples were characterized by titanium K-edge, Titanium L-II and L-III-edge XANES, electron paramagnetic resonance (EPR) and photoluminescence (PL) measurements. XANES results clearly point the presence of local distortion in [TiO6] octahedral clusters until the crystallization was completed. The interactions of the network clusters that form the CT:Sm structures provides favorable structural and electronic conditions for the appearance of PL phenomena. (C) 2012 Published by Elsevier B.V. FAPESP/CEPID FAPESP/CEPID CNPq CNPq CAPES CAPES NSERC NSERC NRC NRC CIHR CIHR University of Saskatchewan University of Saskatchewan |
| Identificador |
CHEMICAL PHYSICS LETTERS, AMSTERDAM, v. 544, n. 6, supl. 2, Part 1-2, pp. 43-48, AUG 20, 2012 0009-2614 http://www.producao.usp.br/handle/BDPI/42018 10.1016/j.cplett.2012.06.027 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
| Relação |
CHEMICAL PHYSICS LETTERS |
| Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
| Palavras-Chave | #TI K-EDGE #THIN-FILMS #OXYGEN VACANCIES #ROOM-TEMPERATURE #BATIO3 #OXIDE #TRANSITIONS #DISORDER #SPECTRA #SRTIO3 #CHEMISTRY, PHYSICAL #PHYSICS, ATOMIC, MOLECULAR & CHEMICAL |
| Tipo |
article original article publishedVersion |
