EXAFS study of the Er3+ ion coordination in SiO2-TiO2-HfO2 sol-gel films (Articolo in rivista)

Type
Label
  • 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)
Pagina inizio
  • 4940 (literal)
Pagina fine
  • 4943 (literal)
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  • 354 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[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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