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dc.contributor.author김동하-
dc.date.accessioned2016-08-28T10:08:00Z-
dc.date.available2016-08-28T10:08:00Z-
dc.date.issued2012-
dc.identifier.issn0947-6539-
dc.identifier.otherOAK-9431-
dc.identifier.urihttp://dspace.ewha.ac.kr/handle/2015.oak/223154-
dc.description.abstractFunctional nanostructures of self-assembled block copolymers (BCPs) incorporated with various inorganic nanomaterials have received considerable attention on account of their many potential applications. Here we demonstrate the two-dimensional self-assembly of anisotropic titanium dioxide (TiO 2) nanocrystals (NCs) and metal nanoparticles (NPs) directed by monolayered poly(styrene)-block-poly(4-vinylpyridine) (PS-b-P4VP) copolymer inverse micelles. The independent position-selective assembly of TiO 2 NCs and silver nanoparticles (AgNPs) preferentially in the intermicelle corona regions and the core of micelles, respectively, for instance, was accomplished by spin-coating a mixture solution of PS-b-P4VP and ex situ synthesized TiO 2 NCs, followed by the reduction of Ag salts coordinated in the cores of micelles into AgNPs. Hydrophobic TiO 2 NCs with a diameter and length of approximately 3 nm and 20-30 nm, respectively, were preferentially sequestered in the intermicelle nonpolar PS corona regions energetically favorable with the minimum entropic packing penalty. Subsequent high-temperature annealing at 550 °C not only effectively removed the block copolymer but also transformed the TiO 2 NCs into connected nanoparticles, thus leading to a two-dimensionally ordered TiO 2 network in which AgNPs were also self-organized. The enhanced photocatalytic activity of the AgNP-decorated TiO 2 networks by approximately 27 and 44 % over that of Ag-free TiO 2 networks and randomly deposited TiO 2 nanoparticles, respectively, was confirmed by the UV degradation property of methylene blue. Of micelles and metals: Coassembly of anisotropic TiO 2 nanocrystals and Ag nanoparticles was achieved in the corona and core regions of monolayered block copolymer micelles, respectively (see figure). Thermal heating removed the block copolymer and the resulting TiO 2 network nanostructure with Ag nanoparticles decorating its pores exhibited excellent photocatalytic performance. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.-
dc.languageEnglish-
dc.titleCoassembly of metal and titanium dioxide nanocrystals directed by monolayered block copolymer inverse micelles for enhanced photocatalytic performance-
dc.typeArticle-
dc.relation.issue46-
dc.relation.volume18-
dc.relation.indexSCI-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.startpage14695-
dc.relation.lastpage14701-
dc.relation.journaltitleChemistry - A European Journal-
dc.identifier.doi10.1002/chem.201200934-
dc.identifier.wosidWOS:000310800200019-
dc.identifier.scopusid2-s2.0-84868712390-
dc.author.googleAcharya H.-
dc.author.googleSung J.-
dc.author.googleBae I.-
dc.author.googleKim T.-
dc.author.googleKim D.H.-
dc.author.googlePark C.-
dc.contributor.scopusid김동하(26039227400)-
dc.date.modifydate20170601133106-
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자연과학대학 > 화학·나노과학전공 > Journal papers
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