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Mapping SERS in CB:Au Plasmonic Nanoaggregates

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Download Hi-Res ImageDownload to MS-PowerPointCite This:ACS Photonics 2017, 4, 11, 2681-2686
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    Mapping SERS in CB:Au Plasmonic Nanoaggregates
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    † NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom
    ‡ Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
    *E-mail: [email protected]
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    ACS Photonics

    Cite this: ACS Photonics 2017, 4, 11, 2681–2686
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    https://doi.org/10.1021/acsphotonics.7b00902
    Published October 16, 2017
    Copyright © 2017 American Chemical Society
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    Abstract

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    In order to optimize surface-enhanced Raman scattering (SERS) of noble metal nanostructures for enabling chemical identification of analyte molecules, careful design of nanoparticle structures must be considered. We spatially map the local SERS enhancements across individual microaggregates comprised of monodisperse nanoparticles separated by rigid monodisperse 0.9 nm gaps and show the influence of depositing these onto different underlying substrates. Experiments and simulations show that the gaps between neighboring nanoparticles dominate the SERS enhancement far more than the gaps between nanoparticles and substrate.

    Copyright © 2017 American Chemical Society

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsphotonics.7b00902.

    • Scanning electron micrographs show 3D fractal geometry of 80 nm nanoparticle aggregates self-assembled via addition of cucurbit[7]uril (PDF).

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    Cited By

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    This article is cited by 24 publications.

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    ACS Photonics

    Cite this: ACS Photonics 2017, 4, 11, 2681–2686
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsphotonics.7b00902
    Published October 16, 2017
    Copyright © 2017 American Chemical Society
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