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Bottom-up Fabrication and Optical Characterization of Dense Films of Meta-Atoms Made of Core-Shell Plasmonic Nanoparticles

hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorMALASSIS, Ludivine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMASSÉ, Pascal
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRÉGUER-DELAPIERRE, Mona
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMORNET, Stéphane
hal.structure.identifierLaboratoire des Composites Thermostructuraux [LCTS]
dc.contributor.authorWEISBECKER, Patrick
hal.structure.identifierSchool of Physics and Astronomy [Manchester]
dc.contributor.authorKRAVETS, Vasyl
hal.structure.identifierSchool of Physics and Astronomy [Manchester]
dc.contributor.authorGRIGORENKO, Alexander
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorBAROIS, Philippe
dc.date.issued2013
dc.identifier.issn0743-7463
dc.description.abstractEnIn an attempt to fabricate low index metamaterials by a bottom-up approach, meta-atoms constituted of silica-coated silver nanoparticles are assembled by a Langmuir-Schaefer technique into thin films of large area and well-controlled thickness. The silica shells ensure a constant distance between the silver cores, hence providing a constant coupling of the localized surface plasmon resonance (LSPR) of the nanoparticles in the assembled composite material. The optical response is studied by normal angle spectral reflectance measurements and by variable angle spectroscopic ellipsometry. The normal incidence data are described well in the framework of a single effective Lorentz oscillator model. The resonance of the assembled material is blue-shifted and shows no significant broadening with respect to the absorption band of the individual nanoparticles. The observation of these two effects is enabled by the core-shell structure of the meta-atoms that prevents aggregation of the metallic cores. The ellipsometry study confirms the general behavior and reveals the natural birefringence of the few-layer materials. The amplitude of the observed resonance is weaker than expected from the Maxwell-Garnett mixing rule. This well-characterized system may constitute a good model for numerical simulations.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enMetamaterials
dc.subject.enSilica
dc.subject.enCoated
dc.subject.enSilver
dc.subject.enNanoparticles
dc.subject.enLangmuir-Schaefer technique
dc.subject.enThin films
dc.subject.enThickness
dc.title.enBottom-up Fabrication and Optical Characterization of Dense Films of Meta-Atoms Made of Core-Shell Plasmonic Nanoparticles
dc.typeArticle de revue
dc.identifier.doi10.1021/la303150r
dc.subject.halChimie/Matériaux
bordeaux.journalLangmuir
bordeaux.page1551-1561
bordeaux.volume29
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-00789749
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00789749v1
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