The stability of “Ce2O3” nanodots in ambient conditions: a study using block copolymer templated structures

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dc.contributor.authorGhoshal, Tandra
dc.contributor.authorFleming, Peter G.
dc.contributor.authorHolmes, Justin D.
dc.contributor.authorMorris, Michael A.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2018-09-13T15:27:54Z
dc.date.available2018-09-13T15:27:54Z
dc.date.issued2012-09-24
dc.date.updated2018-08-07T13:09:15Z
dc.description.abstractThe stability of reduced cerium oxide in ambient conditions is clearly demonstrated in this paper. Well-defined, crystalline, cerium oxide nanodots (predominantly Ce4+ or Ce3+ material could be selectively prepared) were defined at silicon substrate surfaces by a method of block copolymer templating. Here, selective addition of the cerium ion into one block via solvent inclusion and subsequent UV/ozone processing resulted in the formation of well-separated, size mono-dispersed, oxide nanodots having a hexagonal arrangement mimicking that of the polymer nanopattern. The size of the dots could be varied in a facile manner by controlling the metal ion content. Synthesis and processing conditions could be varied to create nanodots which have a Ce2O3 type composition. The stability of the sesquioxide type structure under processing (synthesis) conditions and calcination was explored. Surprisingly, the sesquioxide type structure appears to be reasonably stable in ambient conditions with little evidence for extensive oxidation until heating to temperatures above ambient. Room temperature fluorescence is supposed to originate from a distribution of surface or defect states and depends on preparation conditions.en
dc.description.sponsorshipScience Foundation Ireland (Strategic Research Cluster FORME grant and the CSET CRANN grant)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGhoshal, T., Fleming, P. G., Holmes, J. D. and Morris, M. A. (2012) 'The stability of “Ce2O3” nanodots in ambient conditions: a study using block copolymer templated structures', Journal of Materials Chemistry, 22(43), pp. 22949-22957. doi: 10.1039/c2jm35073den
dc.identifier.doi10.1039/c2jm35073d
dc.identifier.endpage22957en
dc.identifier.issnna
dc.identifier.issn0959-9428
dc.identifier.issued43en
dc.identifier.journaltitleJournal of Materials Chemistryen
dc.identifier.startpage22949en
dc.identifier.urihttps://hdl.handle.net/10468/6780
dc.identifier.volume22en
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urihttp://pubs.rsc.org/en/Content/ArticleLanding/2012/JM/c2jm35073d
dc.rights© The Royal Society of Chemistry 2012en
dc.subjectBlock copolymersen
dc.subjectCalcinationen
dc.subjectCeriumen
dc.subjectCerium compoundsen
dc.subjectMetal ionsen
dc.subjectOxidesen
dc.subjectSurface defectsen
dc.titleThe stability of “Ce2O3” nanodots in ambient conditions: a study using block copolymer templated structuresen
dc.typeArticle (peer-reviewed)en
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