Atomic layer deposition (ALD) of nanoscale coatings on SrAl2O4-based phosphor powders to prevent aqueous degradation

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dc.contributor.authorKaracaoglu, Erkul
dc.contributor.authorOzturk, Esra
dc.contributor.authorUyaner, Mesut
dc.contributor.authorLosego, Mark D.
dc.date.accessioned2024-02-23T14:24:19Z
dc.date.available2024-02-23T14:24:19Z
dc.date.issued2020
dc.departmentNEÜen_US
dc.description.abstractThe aqueous degradation of Eu2+-activated and Dy3+-codoped strontium aluminate (SrAl2O4:Eu2+, Dy3+, SA2-Green) long afterglow phosphors synthesized from solid-state reaction and coated with nanoscale metal oxide protective layers (<= 12 nm) via atomic layer deposition (ALD) is investigated. Uncoated phosphor powders degrade rapidly upon water immersion and lose their green phosphorescence within 48 hours of water exposure. Postmortem investigations reveal hydration and decomposition of the SrAl2O4 phase. ALD of 10 nm Al2O3 or 12 nm TiO2 is found to significantly improve the powder's resistance to aqueous degradation. All ALD-coated powders show minimal structural and chemical degradation and retain phosphoresence after 48 hours of water immersion. This enhanced durability offers a new pathway for applying long afterglow phosphors to outdoor applications like roadway markings or safety signage and for their incorporation into more eco-friendly waterborne coatings.en_US
dc.description.sponsorshipTurkiye Bilimsel ve Teknolojik Arastirma Kurumu [1059B141700014]en_US
dc.description.sponsorshipTurkiye Bilimsel ve Teknolojik Arastirma Kurumu, Grant/Award Number: 1059B141700014en_US
dc.identifier.doi10.1111/jace.17041
dc.identifier.endpage3715en_US
dc.identifier.issn0002-7820
dc.identifier.issn1551-2916
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-85078886269en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage3706en_US
dc.identifier.urihttps://doi.org/10.1111/jace.17041
dc.identifier.urihttps://hdl.handle.net/20.500.12452/13907
dc.identifier.volume103en_US
dc.identifier.wosWOS:000510975200001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofJournal Of The American Ceramic Societyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAtomic Layer Deposition (Ald)en_US
dc.subjectParticle Coatingen_US
dc.subjectPhosphorescenceen_US
dc.subjectSral2o4:Eu2+,Dy3+en_US
dc.subjectWater Exposureen_US
dc.titleAtomic layer deposition (ALD) of nanoscale coatings on SrAl2O4-based phosphor powders to prevent aqueous degradationen_US
dc.typeArticleen_US

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