X-ray absorption spectroscopy of strongly disordered glasses: Local structure around Ag ions in g-Ag2O center dot nB(2)O(3) (Articolo in rivista)

Type

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

Label

• X-ray absorption spectroscopy of strongly disordered glasses: Local structure around Ag ions in g-Ag2O center dot nB(2)O(3) (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Alternative label

• Kuzmin, A; Dalba, G; Fornasini, P; Rocca, F; Sipr, O (2006)
  X-ray absorption spectroscopy of strongly disordered glasses: Local structure around Ag ions in g-Ag2O center dot nB(2)O(3)
  
  (literal)

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

• Kuzmin, A; Dalba, G; Fornasini, P; Rocca, F; Sipr, O (literal)

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

• 73 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia; Univ Trent, INFM, I-38050 Povo, Trento, Italy; Univ Trent, Dipartimento Fis, I-38050 Povo, Trento, Italy; CNR, IFN, Sez ITC CeFSA Trento, I-38050 Povo, Trento, Italy; Acad Sci Czech Republ, Inst Phys, CZ-16253 Prague, Czech Republic (literal)

Titolo

• X-ray absorption spectroscopy of strongly disordered glasses: Local structure around Ag ions in g-Ag2O center dot nB(2)O(3) (literal)

Abstract

• The local structure around Ag ions in silver borate glasses g-Ag2O center dot nB(2)O(3) (n=2,4) was studied by x-ray absorption spectroscopy at the Ag K edge for temperatures from 77 to 450 K. Extended x-ray absorption fine structure (EXAFS) analysis based on cumulant expansion or multishell Gaussian model fails for these systems. Therefore, the radial distribution functions (RDFs) around Ag ions were reconstructed using a method based on the direct inversion of the EXAFS expression. The RDFs consist of about eight atoms (oxygens and borons), exhibit a relatively weak temperature dependence, and indicate the presence of strong static disorder. Two main components can be identified in RDFs, located at about 2.3-2.4 A and 2.5-3.4 A, respectively. The chemical types of atoms contributing to the RDF were determined via a simulation of configurationally averaged x-ray absorption near-edge structure (XANES) and EXAFS signals. The immediate neighborhood of Ag contains mostly oxygens while borons dominate at larger distances. The combination of EXAFS and XANES techniques allowed us to determine a more complete structural model than would be possible by relying solely on either EXAFS or XANES alone. (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

• PAOLO FORNASINI (Persona)

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• Parole chiave di "X-ray absorption spectroscopy of strongly disordered glasses: Local structure around Ag ions in g-Ag2O center dot nB(2)O(3)" (Insieme di parole chiave)

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Autore CNR di

• PAOLO FORNASINI (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)

Insieme di parole chiave di

• Parole chiave di "X-ray absorption spectroscopy of strongly disordered glasses: Local structure around Ag ions in g-Ag2O center dot nB(2)O(3)" (Insieme di parole chiave)