EXAFS study of Er,Yb doped hollow and dense SiO2microspheres (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• EXAFS study of Er,Yb doped hollow and dense SiO2microspheres (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.jnoncrysol.2014.06.004 (literal)

Alternative label

• L.M. Fortes, M.C. Gonçalves,J.C. Pereira,F.D'Acapito (2014)
  EXAFS study of Er,Yb doped hollow and dense SiO2microspheres
  in Journal of non-crystalline solids
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• L.M. Fortes, M.C. Gonçalves,J.C. Pereira,F.D'Acapito (literal)

Pagina inizio

• 244 (literal)

Pagina fine

• 251 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 402 (literal)

Rivista

• Journal of non-crystalline solids (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Istituto Superior Tecnico, Lisboa CNR-IOM (literal)

Titolo

• EXAFS study of Er,Yb doped hollow and dense SiO2microspheres (literal)

Abstract

• Hollow and dense SiO2microspheres doped with Er,Yb were characterized by extended X-ray absorptionfine structure (EXAFS) on the Er,Yb LIIIedges and photoluminescence (PL)measurements. The samples were synthe-sizedby the sol-gelmethod andin situEr,Ybdoped, by introducingfluoride compounds (ErF3,YbF3) in the sol. Er, Yb doped transparent glass-ceramic, formed by NaYF4nanocrystals dispersed in SiO2matrix, was taken as the reference. The EXAFS results illustrate the Er,Yb local environment in all studied SiO2matrices: in hollow-microspheres, crystalline Er,Ybfluoride was formed while in dense-microspheres, crystalline Er,Yb oxide developed. PL measurements of the Er 3+ emission at 1.54?m were performed, on hollow and dense SiO2microspheres, for different Er 3+ /Yb 3+ ratios, ranging from 1:3 to 1:10 mol%. Upconversion was observed inall samples, ordered by efficiency for the studied Er,Yb environments as: glass-ceramic (NaYF4environment)>>hollow SiO2micro-spheres (Er,Ybfluoride crystalline environment)Ndense SiO2microspheres (Er,Yb oxide crystalline environ-ment). X-ray excited optical luminescence (XEOL) confirmed the Er green upconversion results (literal)

Prodotto di

• Sviluppo di strumentazione e di metodologie sperimentali avanzate per lo studio delle proprieta strutturali dei materiali con raggi X da sincrotrone (MD.P04.007.001) (Modulo)

Autore CNR

• FRANCESCO D'ACAPITO (Persona)

Incoming links:

Autore CNR di

• FRANCESCO D'ACAPITO (Persona)

Prodotto

• Sviluppo di strumentazione e di metodologie sperimentali avanzate per lo studio delle proprieta strutturali dei materiali con raggi X da sincrotrone (MD.P04.007.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of non-crystalline solids (Rivista)