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Polyhedral plasmonic nanoclusters through multi-step colloidal chemistry

hal.structure.identifierHarvard University
dc.contributor.authorTANJEEM, Nabila
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHOMETTE, Cyril
hal.structure.identifierDepartment of Physics
dc.contributor.authorSCHADE, Nicholas B.
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorRAVAINE, Serge
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUGUET, Etienne
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRÉGUER-DELAPIERRE, Mona
hal.structure.identifierDepartment of Physics
dc.contributor.authorMANOHARAN, Vinothan N.
dc.date.issued2021
dc.identifier.issn2051-6347
dc.description.abstractEnWe describe a new approach to making plasmonic metamolecules with well-controlled resonances at optical wavelengths. Metamolecules are highly symmetric, subwavelength-scale clusters of metal and dielectric. They are of interest for metafluids, isotropic optical materials with applications in imaging and optical communications. For such applications, the morphology must be precisely controlled: the optical response is sensitive to nanometer-scale variations in the thickness of metal coatings and the distances between metal surfaces. To achieve this precision, we use a multi-step colloidal synthesis approach. Starting from highly monodisperse silica seeds, we grow octahedral clusters of polystyrene spheres using seeded-growth emulsion polymerization. We then overgrow the silica and remove the polystyrene to create a dimpled template. Finally, we attach six silica satellites to the template and coat them with gold. Using single-cluster spectroscopy, we show that the plasmonic resonances are reproducible from cluster to cluster. By comparing the spectra to theory, we show that the multi-step synthesis approach can control the distances between metallic surfaces to nanometer-scale precision. More broadly, our approach shows how metamolecules can be produced in bulk by combining different, high-yield colloidal synthesis steps, analogous to how small molecules are produced by multi-step chemical reactions.
dc.description.sponsorshipAdvanced Materials by Design - ANR-10-LABX-0042
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherthe Royal Society of Chemistry
dc.title.enPolyhedral plasmonic nanoclusters through multi-step colloidal chemistry
dc.typeArticle de revue
dc.identifier.doi10.1039/D0MH01311K
dc.subject.halChimie/Matériaux
bordeaux.journalMaterials Horizons
bordeaux.page565-570
bordeaux.volume8
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-03145619
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03145619v1
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