http://www.cnr.it/ontology/cnr/individuo/prodotto/ID3870
EXAFS study of the Er3+ ion coordination in SiO2-TiO2-HfO2 sol-gel films (Articolo in rivista)
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- EXAFS study of the Er3+ ion coordination in SiO2-TiO2-HfO2 sol-gel films (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
d'Acapito, F; Marques, AC; Santos, LF; Almeida, RM (2008)
EXAFS study of the Er3+ ion coordination in SiO2-TiO2-HfO2 sol-gel films
in Journal of non-crystalline solids
(literal)
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- d'Acapito, F; Marques, AC; Santos, LF; Almeida, RM (literal)
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- \"[d'Acapito, Francesco] ESRF, GILDA, CRG, CNR,INFM,OGG, F-38043 Grenoble, France; [Marques, Ana C.; Santos, Luis F.; Almeida, Rui M.] TU Lisbon, Inst Super Tecn, ICEMS, Dept Mat Engn, P-1049001 Lisbon, Portugal (literal)
- Titolo
- EXAFS study of the Er3+ ion coordination in SiO2-TiO2-HfO2 sol-gel films (literal)
- Abstract
- The local order around ion-implanted Er3+ ions in SiO2-TiO2-HfO2 thin films prepared by sol-gel, was studied by extended X-ray absorption fine structure at the Er-L-III edge. Both the first and second coordination shells of Er3+ were analyzed for different heat-treatments. While the first coordination shell always consisted of similar to 6-7 oxygen atoms at distances varying between 2.23 and 2.27 angstrom, the Structure of the second shell was found to vary with the film composition and heat-treatment. Namely, whereas Si was found to be the only second neighbor of erbium in binary SiO2-TiO2 films, the addition of HfO2 caused a preferential replacement of Si by Hf. The post-implantation thermal treatments also played a fundamental role in determining the final environment of the erbium ions. (C) 2008 Elsevier B.V. All rights reserved. (literal)
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