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dc.contributor.authorMelnikau, Dzmitry
dc.contributor.authorGovyadinov, Alexander A.
dc.contributor.authorSánchez-Iglesias, Ana
dc.contributor.authorGrzelczak, Marek
dc.contributor.authorLiz-Marzán, Luis M.
dc.contributor.authorRakovich, Yury P.
dc.date.accessioned2018-09-20T16:17:39Z
dc.date.available2018-09-20T16:17:39Z
dc.date.issued2017-02-08
dc.identifier.citationMelnikau, Dzmitry; Govyadinov, Alexander A. Sánchez-Iglesias, Ana; Grzelczak, Marek; Liz-Marzán, Luis M.; Rakovich, Yury P. (2017). Strong magneto-optical response of nonmagnetic organic materials coupled to plasmonic nanostructures. Nano Letters 17 (3), 1808-1813
dc.identifier.issn1530-6984,1530-6992
dc.identifier.urihttp://hdl.handle.net/10379/12872
dc.description.abstractPlasmonic nanoparticles (PNPs) can significantly modify the optical properties of nearby organic molecules and thus present an attractive opportunity for sensing applications. However, the utilization of PNPs in conventional absorption, fluorescence, or Raman spectroscopy techniques is often ineffective due to strong absorption background and light scattering, particularly in the case of turbid solutions, cell suspensions, and biological tissues. Here we show that nonmagnetic organic molecules may exhibit magneto-optical response due to binding to a PNP. Specifically, we detect strong magnetic circular dichroism signal from supramolecular J-aggregates, a representative organic dye, upon binding to silver-coated gold nanorods. We explain this effect by strong coupling between the J-aggregate exciton and the nanoparticle plasmon, leading to the formation of a hybrid state in which the exciton effectively acquires magnetic properties from the plasmon. Our findings are fully corroborated by theoretical modeling and constitute a novel magnetic method for chemo- and biosensing, which (upon adequate PNP functionalization) is intrinsically insensitive to the organic background and thus offers a significant advantage over conventional spectroscopy techniques.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.ispartofNano Letters
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectsensing
dc.subjectmagneto-optical activity
dc.subjectmagneto-plasmonics
dc.subjectj-aggregates
dc.subjectplexciton
dc.subjectstrong coupling
dc.subjectcircular-dichroism
dc.subjectgold nanorods
dc.subjectnanoparticles
dc.subjectmagnetoplasmonics
dc.subjectenhancement
dc.subjectfluorescence
dc.subjectnanosensors
dc.subjectnanoscale
dc.subjectprovides
dc.subjectspectra
dc.titleStrong magneto-optical response of nonmagnetic organic materials coupled to plasmonic nanostructures
dc.typeArticle
dc.identifier.doi10.1021/acs.nanolett.6b05128
dc.local.publishedsourcehttps://doi.org/10.1021/acs.nanolett.6b05128
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland