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

Show simple item record Ghoshal, Tandra Fleming, Peter G. Holmes, Justin D. Morris, Michael A. 2018-09-13T15:27:54Z 2018-09-13T15:27:54Z 2012-09-24
dc.identifier.citation Ghoshal, 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/c2jm35073d en
dc.identifier.volume 22 en
dc.identifier.issued 43 en
dc.identifier.startpage 22949 en
dc.identifier.endpage 22957 en
dc.identifier.issn na
dc.identifier.issn 0959-9428
dc.identifier.doi 10.1039/c2jm35073d
dc.description.abstract The 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.sponsorship Science Foundation Ireland (Strategic Research Cluster FORME grant and the CSET CRANN grant) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Royal Society of Chemistry (RSC) en
dc.rights © The Royal Society of Chemistry 2012 en
dc.subject Block copolymers en
dc.subject Calcination en
dc.subject Cerium en
dc.subject Cerium compounds en
dc.subject Metal ions en
dc.subject Oxides en
dc.subject Surface defects en
dc.title The stability of “Ce2O3” nanodots in ambient conditions: a study using block copolymer templated structures en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Justin D. Holmes, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en 2018-08-07T13:09:15Z
dc.description.version Accepted Version en
dc.internal.rssid 231934844
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Materials Chemistry en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en

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