Chiral and Achiral Nanodumbbell Dimers: The Effect of Geometry on Plasmonic Properties

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dc.citation.firstpage6180en_US
dc.citation.issueNumber6en_US
dc.citation.journalTitleACS Nanoen_US
dc.citation.lastpage6188en_US
dc.citation.volumeNumber10en_US
dc.contributor.authorSmith, Kyle W.en_US
dc.contributor.authorZhao, Hangqien_US
dc.contributor.authorZhang, Huien_US
dc.contributor.authorSánchez -Iglesias, Anaen_US
dc.contributor.authorGrzelczak, Mareken_US
dc.contributor.authorWang, Yuminen_US
dc.contributor.authorChang, Wei-Shunen_US
dc.contributor.authorNordlander, Peteren_US
dc.contributor.authorLiz-Marzán, Luisen_US
dc.contributor.authorLink, Stephanen_US
dc.contributor.orgLaboratory for Nanophotonicsen_US
dc.date.accessioned2016-07-14T19:43:53Zen_US
dc.date.available2016-07-14T19:43:53Zen_US
dc.date.issued2016en_US
dc.description.abstractMetal nanoparticles with a dumbbell-like geometry have plasmonic properties similar to those of their nanorod counterparts, but the unique steric constraints induced by their enlarged tips result in distinct geometries when self-assembled. Here, we investigate gold dumbbells that are assembled into dimers within polymeric micelles. A single-particle approach with correlated scanning electron microscopy and dark-field scattering spectroscopy reveals the effects of dimer geometry variation on the scattering properties. The dimers are prepared using exclusively achiral reagents, and the resulting dimer solution produces no detectable ensemble circular dichroism response. However, single-particle circular differential scattering measurements uncover that this dimer sample is a racemic mixture of individual nanostructures with significant positive and negative chiroptical signals. These measurements are complemented with detailed simulations that confirm the influence of various symmetry elements on the overall peak resonance energy, spectral line shape, and circular differential scattering response. This work expands the current understanding of the influence self-assembled geometries have on plasmonic properties, particularly with regard to chiral and/or racemic samples which may have significant optical activity that may be overlooked when using exclusively ensemble characterization techniques.en_US
dc.identifier.citationSmith, Kyle W., Zhao, Hangqi, Zhang, Hui, et al.. "Chiral and Achiral Nanodumbbell Dimers: The Effect of Geometry on Plasmonic Properties." <i>ACS Nano,</i> 10, no. 6 (2016) American Chemical Society: 6180-6188. http://dx.doi.org/10.1021/acsnano.6b02194.en_US
dc.identifier.doihttp://dx.doi.org/10.1021/acsnano.6b02194en_US
dc.identifier.urihttps://hdl.handle.net/1911/90917en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordchiroptical activityen_US
dc.subject.keywordgold nanoparticlesen_US
dc.subject.keywordlocalized surface plasmonsen_US
dc.subject.keywordself-assemblyen_US
dc.subject.keywordsingle-particle spectroscopyen_US
dc.titleChiral and Achiral Nanodumbbell Dimers: The Effect of Geometry on Plasmonic Propertiesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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