Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 김동하 | * |
dc.date.accessioned | 2016-08-28T10:08:00Z | - |
dc.date.available | 2016-08-28T10:08:00Z | - |
dc.date.issued | 2012 | * |
dc.identifier.issn | 0947-6539 | * |
dc.identifier.other | OAK-9431 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/223154 | - |
dc.description.abstract | Functional 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.language | English | * |
dc.title | Coassembly of metal and titanium dioxide nanocrystals directed by monolayered block copolymer inverse micelles for enhanced photocatalytic performance | * |
dc.type | Article | * |
dc.relation.issue | 46 | * |
dc.relation.volume | 18 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 14695 | * |
dc.relation.lastpage | 14701 | * |
dc.relation.journaltitle | Chemistry - A European Journal | * |
dc.identifier.doi | 10.1002/chem.201200934 | * |
dc.identifier.wosid | WOS:000310800200019 | * |
dc.identifier.scopusid | 2-s2.0-84868712390 | * |
dc.author.google | Acharya H. | * |
dc.author.google | Sung J. | * |
dc.author.google | Bae I. | * |
dc.author.google | Kim T. | * |
dc.author.google | Kim D.H. | * |
dc.author.google | Park C. | * |
dc.contributor.scopusid | 김동하(26039227400) | * |
dc.date.modifydate | 20240123104500 | * |