DNA Origami Directed Au Nanostar Dimers for Single-Molecule Surface-Enhanced Raman Scattering

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dc.contributor.authorTanwar, Swati
dc.contributor.authorHaldar, Krishna Kanta
dc.contributor.authorSen, Tapasi
dc.contributor.authorTanwar, S.
dc.contributor.authorHaldar, K.K.
dc.contributor.authorSen, T.
dc.date.accessioned2018-02-01T09:33:07Z
dc.date.accessioned2024-08-13T11:16:43Z
dc.date.available2018-02-01T09:33:07Z
dc.date.available2024-08-13T11:16:43Z
dc.date.issued2017
dc.description.abstractWe demonstrate the synthesis of Au nanostar dimers with tunable interparticle gap and controlled stoichiometry assembled on DNA origami. Au nanostars with uniform and sharp tips were immobilized on rectangular DNA origami dimerized structures to create nanoantennas containing monomeric and dimeric Au nanostars. Single Texas red (TR) dye was specifically attached in the junction of the dimerized origami to act as a Raman reporter molecule. The SERS enhancement factors of single TR dye molecules located in the conjunction region in dimer structures having interparticle gaps of 7 and 13 nm are 2 ? 1010 and 8 ? 109, respectively, which are strong enough for single analyte detection. The highly enhanced electromagnetic field generated by the plasmon coupling between sharp tips and cores of two Au nanostars in the wide conjunction region allows the accommodation and specific detection of large biomolecules. Such DNA-directed assembled nanoantennas with controlled interparticle separation distance and stoichiometry, and well-defined geometry, can be used as excellent substrates in single-molecule SERS spectroscopy and will have potential applications as a reproducible platform in single-molecule sensing. ? 2017 American Chemical Society.en_US
dc.identifier.citationTanwar, S., Haldar, K. K., & Sen, T. (2017). DNA Origami Directed Au Nanostar Dimers for Single-Molecule Surface-Enhanced Raman Scattering. Journal of the American Chemical Society, 139(48), 17639-17648. doi: 10.1021/jacs.7b10410en_US
dc.identifier.doi10.1021/jacs.7b10410
dc.identifier.issn27863
dc.identifier.urihttp://10.2.3.109/handle/32116/561
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/jacs.7b10410
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.titleDNA Origami Directed Au Nanostar Dimers for Single-Molecule Surface-Enhanced Raman Scatteringen_US
dc.title.journalJournal of the American Chemical Society
dc.typeArticleen_US

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