Photo-induced effects in Ge25Ga10S65 glasses studied by XPS and XAS

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorLisboa Filho, Paulo Noronha
dc.creatorMastelaro, V. R.
dc.creatorSchreiner, W. H.
dc.creatorMessaddeq, S. H.
dc.creatorLi, M. S.
dc.creatorMessaddeq, Younes
dc.creatorHammer, Peter
dc.creatorRibeiro, SJL
dc.creatorParent, P.
dc.creatorLaffon, C.
dc.date2014-05-20T15:27:15Z
dc.date2016-10-25T18:02:02Z
dc.date2014-05-20T15:27:15Z
dc.date2016-10-25T18:02:02Z
dc.date2005-05-12
dc.date.accessioned2017-04-06T00:01:08Z
dc.date.available2017-04-06T00:01:08Z
dc.identifierSolid State Ionics. Amsterdam: Elsevier B.V., v. 176, n. 15-16, p. 1403-1409, 2005.
dc.identifier0167-2738
dc.identifierhttp://hdl.handle.net/11449/37275
dc.identifierhttp://acervodigital.unesp.br/handle/11449/37275
dc.identifier10.1016/j.ssi.2005.04.005
dc.identifierWOS:000230094700009
dc.identifierhttp://dx.doi.org/10.1016/j.ssi.2005.04.005
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/880621
dc.descriptionThe present paper focuses on the structural, electronic, and compositional properties of Ge25Ga10S65 glasses before and after UV illumination in air using X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) techniques. The XPS Ge 3d spectra reveal the existence of Ge-O bonds in the surface region of illuminated glass. In the case of this sample, XAS O K-edge spectra showed the formation of an enriched region of oxygen atoms in the glass bulk, indicating a different bonding structure of oxygen at the surface and in the bulk of the glass. Moreover, the structural changes that occur after UV illumination in the glass sample are identified as the formation of a homogeneous germanium oxide surface layer followed by an intermediary Ge25Ga10S65-yOz subsurface region. (c) 2005 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationSolid State Ionics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectchalcogenide glasses
dc.subjectphoto-induced effects
dc.subjectoxygen
dc.subjectXPS
dc.subjectXAS
dc.titlePhoto-induced effects in Ge25Ga10S65 glasses studied by XPS and XAS
dc.typeOtro


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