X-ray absorption and diffraction studies of Pr3+, Tb3+ and Er3+-activated silica gels. (Articolo in rivista)

Type
Label
  • X-ray absorption and diffraction studies of Pr3+, Tb3+ and Er3+-activated silica gels. (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Rocca F.; Armellini C.; Ferrari M.; Dalba G.; Diab N.; Kuzmin A.; Monti F. (2003)
    X-ray absorption and diffraction studies of Pr3+, Tb3+ and Er3+-activated silica gels.
    in Journal of sol-gel science and technology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Rocca F.; Armellini C.; Ferrari M.; Dalba G.; Diab N.; Kuzmin A.; Monti F. (literal)
Pagina inizio
  • 267 (literal)
Pagina fine
  • 271 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 26 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • X-ray absorption and diffraction studies of Pr3+, Tb3+ and Er3+-activated silica gels. (literal)
Abstract
  • Rare-earth (Pr3+, Tb3+, Er3+) doped silica xerogels were studied by x-ray absorption spectroscopy and x-ray diffraction. A change of the local environment around rare-earth ions upon xerogel densification at 900-950 degreesC and co-doping with aluminum ions was determined from the rare-earths L-3-edge EXAFS signals. The densification process induces a decrease of the coordination number and a compression and deformation of the first coordination shell, composed of oxygen atoms. The second coordination shell, composed of silicon and/or aluminum ions, also experiences some modification, which is attributed mainly to a shortening of the shell radius. No evidence of clustering of rare-earth ions upon densification was observed. X-ray diffraction data on Tb-doped gels confirm the EXAFS results (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it