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Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams

dc.creatorŠiljegović, Milorad
dc.creatorKačarević-Popović, Zorica M.
dc.creatorBibić, Nataša M.
dc.creatorJovanović, Zoran M.
dc.creatorMaletić, Slobodan
dc.creatorStchakovsky, M.
dc.creatorKrklješ, Aleksandra N.
dc.date.accessioned2018-03-01T22:01:23Z
dc.date.available2018-03-01T22:01:23Z
dc.date.issued2011
dc.identifier.issn0969-806X
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/4516
dc.description.abstractFluorinated ethylene propylene (FEP) and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) (PFA) copolymer films were irradiated in vacuum with 60 key C4+ and N4+ ions to fluences ranging from 1.0 x 10(12) to 5.0 x 10(15) cm(-2). Changes in optical and dielectric properties were analyzed by spectroscopic ellipsometry and ultraviolet-visible (UV-vis), Raman and dielectric relaxation spectroscopies. Direct and indirect energy band gap values were determined from the absorption edge in the 200-800 nm region using Taucs relation. The values of the direct energy gap have been found to be greater than the corresponding values of the indirect energy gap. Significant changes in the index of refraction, and 13 and gamma dielectric relaxations were observed in the case of N4+ irradiated FEP and PFA samples. (C) 2011 Elsevier Ltd. All rights reserved.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45006/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45005/RS//
dc.rightsrestrictedAccessen
dc.sourceRadiation Physics and Chemistryen
dc.subjectIon bombardmenten
dc.subjectFEPen
dc.subjectPFAen
dc.subjectEllipsometryen
dc.subjectOptical energy gapen
dc.titleOptical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beamsen
dc.typearticleen
dcterms.abstractБибиц, Н.; Стцхаковскy, М.; Малетић Слободан; Шиљеговић Милорад; Кркљес, A. Н.; Качаревић-Поповић Зорица М; Јовановић Зоран;
dc.citation.volume80
dc.citation.issue12
dc.citation.spage1378
dc.citation.epage1385
dc.identifier.wos000295665100014
dc.identifier.doi10.1016/j.radphyschem.2011.08.012
dc.citation.rankM21
dc.identifier.scopus2-s2.0-80052967740


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