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구강희

Ku, Kang Hee
Polymers & Complex Fluids Laboratory
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dc.citation.number 29 -
dc.citation.startPage 1700608 -
dc.citation.title ADVANCED MATERIALS -
dc.citation.volume 29 -
dc.contributor.author Lee, Junhyuk -
dc.contributor.author Ku, Kang Hee -
dc.contributor.author Kim, Mingoo -
dc.contributor.author Shin, Jae Man -
dc.contributor.author Han, Junghun -
dc.contributor.author Park, Chan Ho -
dc.contributor.author Yi, Gi-Ra -
dc.contributor.author Jang, Se Gyu -
dc.contributor.author Kim, Bumjoon J. -
dc.date.accessioned 2023-12-21T21:48:53Z -
dc.date.available 2023-12-21T21:48:53Z -
dc.date.created 2022-03-08 -
dc.date.issued 2017-08 -
dc.description.abstract Development of particles that change shape in response to external stimuli has been a long-thought goal for producing bioinspired, smart materials. Herein, the temperature-driven transformation of the shape and morphology of polymer particles composed of polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) block copolymers (BCPs) and temperature-responsive poly-(N-isopropylacrylamide) (PNIPAM) surfactants is reported. PNIPAM acts as a temperature-responsive surfactant with two important roles. First, PNIPAM stabilizes oil-in-water droplets as a P4VP-selective surfactant, creating a nearly neutral interface between the PS and P4VP domains together with cetyltrimethylammonium bromide, a PS-selective surfactant, to form anisotropic PS-b-P4VP particles (i.e., convex lenses and ellipsoids). More importantly, the temperature-directed positioning of PNIPAM depending on its solubility determines the overall particle shape. Ellipsoidal particles are produced above the critical temperature, whereas convex lens-shaped particles are obtained below the critical temperature. Interestingly, given that the temperature at which particle shape change occurs depends solely on the lower critical solution temperature (LCST) of the polymer surfactants, facile tuning of the transition temperature is realized by employing other PNIPAM derivatives with different LCSTs. Furthermore, reversible transformations between different shapes of PS-b-P4VP particles are successfully demonstrated using a solvent-adsorption annealing with chloroform, suggesting great promise of these particles for sensing, smart coating, and drug delivery applications. -
dc.identifier.bibliographicCitation ADVANCED MATERIALS, v.29, no.29, pp.1700608 -
dc.identifier.doi 10.1002/adma.201700608 -
dc.identifier.issn 0935-9648 -
dc.identifier.scopusid 2-s2.0-85020213049 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/57831 -
dc.identifier.url https://onlinelibrary.wiley.com/doi/10.1002/adma.201700608 -
dc.identifier.wosid 000406677900016 -
dc.language 영어 -
dc.publisher WILEY-V C H VERLAG GMBH -
dc.title Stimuli-Responsive, Shape-Transforming Nanostructured Particles -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter -
dc.relation.journalResearchArea Chemistry; Science & Technology - Other Topics; Materials Science; Physics -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor block copolymer particles -
dc.subject.keywordAuthor PNIPAM surfactants -
dc.subject.keywordAuthor responsive particles -
dc.subject.keywordAuthor shape-transform -
dc.subject.keywordAuthor temperature-responsiveness -
dc.subject.keywordPlus BLOCK-COPOLYMER NANOPARTICLES -
dc.subject.keywordPlus GRAPHENE QUANTUM DOTS -
dc.subject.keywordPlus SPIN-LABELED POLYMERS -
dc.subject.keywordPlus PHASE-TRANSITION -
dc.subject.keywordPlus COLLOIDAL PARTICLES -
dc.subject.keywordPlus DIBLOCK COPOLYMERS -
dc.subject.keywordPlus PHOTONIC CRYSTALS -
dc.subject.keywordPlus DRUG-DELIVERY -
dc.subject.keywordPlus PH SENSOR -
dc.subject.keywordPlus SURFACTANTS -

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