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dc.contributor.authorPark, Eun-Juen_US
dc.contributor.authorErdem, T.en_US
dc.contributor.authorIbrahimova, V.en_US
dc.contributor.authorNizamoglu, S.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.contributor.authorTuncel, D.en_US
dc.date.accessioned2016-02-08T09:53:29Z
dc.date.available2016-02-08T09:53:29Z
dc.date.issued2011en_US
dc.identifier.issn1936-0851
dc.identifier.urihttp://hdl.handle.net/11693/21952
dc.description.abstractWe report on the synthesis and characterization of water-dispersible, mechanically stable conjugated polymer nanoparticles (CPNs) in shelled architecture with tunable emission and controllable photometric properties via cross-linking. Using a reprecipitation method, whiteemitting polymer nanoparticles are prepared in different sizes by varying the concentration of polymer; the emission kinetics are tuned by controlling the shell formation. For this purpose, polyfluorene derivatives containing azide groups are selected that can be decomposed under UV light to generate very reactive species, which opportunely facilitate the inter- and intra-cross-linking of polymer chains to form shells. Nanoparticles before and after UV treatment are characterized by various techniques. Their size and morphologies are determined by using dynamic light scattering (DLS) measurements and imaging techniques including scanning electron microscopy (SEM) and atomic force microscopy (AFM). For optical characterization, UV vis and steady-state and timeresolved fluorescent spectroscopies are performed. Solid-state behaviors of these CPNs are also investigated by forming films through drop-casting. Moreover, the photometric calculations are also performed for films and dispersions to determine the color quality. A device has been constructed to show proof-of-principle white light generation from these nanoparticles. Additionally, mechanical stability studies are performed and demonstrated that these nanoparticles are indeed mechanically stable by removing the solvent after cross-linking using a freeze-dryer and redispersing in water and THF. Optical and imaging data confirm that the redispersed particles preserve their shapes and sizes after cross-linking.en_US
dc.language.isoEnglishen_US
dc.source.titleACS Nanoen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/nn103598qen_US
dc.subjectColor conversionen_US
dc.subjectConjugated polymer nanoparticlesen_US
dc.subjectCross-linked shellen_US
dc.subjectWhite light emissionen_US
dc.subjectAzide groupen_US
dc.subjectBefore and afteren_US
dc.subjectColor conversionsen_US
dc.subjectColor qualityen_US
dc.subjectConjugated polymer nanoparticlesen_US
dc.subjectCross-linked shellsen_US
dc.subjectDifferent sizesen_US
dc.subjectDrop-castingen_US
dc.subjectEmitting polymersen_US
dc.subjectImaging dataen_US
dc.subjectMechanically stableen_US
dc.subjectOptical characterizationen_US
dc.subjectPhotometric propertiesen_US
dc.subjectPolyfluorene derivativeen_US
dc.subjectPolymer chainsen_US
dc.subjectPolymer nanoparticlesen_US
dc.subjectProof of principlesen_US
dc.subjectReactive speciesen_US
dc.subjectReprecipitation methodsen_US
dc.subjectSEMen_US
dc.subjectShell formationen_US
dc.subjectState behavioren_US
dc.subjectTime-resolved fluorescent spectroscopyen_US
dc.subjectTunable emissionsen_US
dc.subjectUV lighten_US
dc.subjectUV treatmenten_US
dc.subjectWater dispersibleen_US
dc.subjectWhite light emissionen_US
dc.subjectWhite-light generationen_US
dc.subjectAtomic force microscopyen_US
dc.subjectCastingen_US
dc.subjectColoren_US
dc.subjectDynamic light scatteringen_US
dc.subjectImaging techniquesen_US
dc.subjectLight emissionen_US
dc.subjectMechanical propertiesen_US
dc.subjectMechanical stabilityen_US
dc.subjectNanoparticlesen_US
dc.subjectPhotometryen_US
dc.subjectScanning electron microscopyen_US
dc.subjectShells (structures)en_US
dc.subjectConjugated polymersen_US
dc.titleWhite-emitting conjugated polymer nanoparticles with cross-linked shell for mechanical stability and controllable photometric properties in color-conversion LED applicationsen_US
dc.typeArticleen_US
dc.departmentDepartment of Chemistry
dc.departmentDepartment of Physics
dc.departmentDepartment of Electrical and Electronics Engineering
dc.departmentInstitute of Materials Science and Nanotechnology UNAM
dc.departmentNanotechnology Research Center NANOTAM
dc.citation.spage2483en_US
dc.citation.epage2492en_US
dc.citation.volumeNumber5en_US
dc.citation.issueNumber4en_US
dc.identifier.doi10.1021/nn103598qen_US
dc.contributor.bilkentauthorDemir, Hilmi Volkanen_US
dc.identifier.eissn1936-086X


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