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Hexagonal-to-cubic phase transformation in composite thin films induced by FePt nanoparticles located at PS/PEO interfaces

dc.rights.licenseopen
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
dc.contributor.authorAISSOU, Karim
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
dc.contributor.authorFLEURY, Guillaume
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
dc.contributor.authorPÉCASTAINGS, Gilles
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorALNASSER, Thomas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMORNET, Stéphane
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGOGLIO, Graziella
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
dc.contributor.authorHADZIIOANNOU, Georges
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2011
dc.identifier.issn0743-7463
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/20552
dc.description.abstractEnThe organization process of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with FePt nanoparticles is studied. In a first step, it is shown that FePt nanoparticles stabilized by oleic acid ligands are distributed within the PS matrix phase, whereas the same particles partially covered with short dopamine-terminated-methoxy poly(ethylene oxide) (mPEO-Dopa) are located at PS/PEO interfaces. The swelling of PS domains, induced by FePt_oleic acid nanoparticles during the solvent annealing process, results in formation of a disordered microstructure in comparison to the well-organized hexagonally close-packed (HCP) cylinder phase formed in the neat PS-b-PEO copolymer. The evolution of the microstructure of PS-b-PEO/FePt_mPEO-Dopa composite has been investigated for different solvent annealing treatments. Under high-humidity conditions during the vapor annealing process, the addition of FePt nanoparticles results in formation of spheres in the film split into terraces. The upper and lower terraces are occupied by spheres organized in an unusual square and HCP phases, respectively. Under low-humidity conditions, undulated PEO cylinders oriented parallel to substrate are formed in the presence of FePt nanoparticles. In this case, we observe that most of the nanoparticles accumulate within the core of topological defects, which induces a low nanoparticle concentration at the PS/PEO interfaces and so stabilizes an intermediate undulated cylinder phase.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enIron-Platinum
dc.subject.enThin films
dc.subject.enNanoparticles
dc.subject.enPoly(styrene-block-ethylene oxide)
dc.subject.enCopolymer
dc.title.enHexagonal-to-cubic phase transformation in composite thin films induced by FePt nanoparticles located at PS/PEO interfaces
dc.typeArticle de revue
dc.identifier.doi10.1021/la2036983
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Polymères
bordeaux.journalLangmuir
bordeaux.page14481-14488
bordeaux.volume27
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue23
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00653326
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00653326v1
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