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Plasmonic response and SERS modulation in electrochemical applied potentials

Abstract

We study the optical response of individual nm-wide plasmonic nanocavities using a nanoparticle-on-mirror design utilised as an electrode in an electrochemical cell. In this geometry Au nanoparticles are separated from a bulk Au film by an ultrathin molecular spacer, giving intense and stable Raman amplification of 100 molecules. Modulation of the plasmonic spectra and the SERS response is observed with applied voltage under a variety of electrolytes. Different scenarios are discussed to untangle the various mechanisms that can be involved in the electronic interaction between NPs and electrode surfaces.

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Publication details

The article was received on 11 Apr 2017, accepted on 26 Apr 2017 and first published on 27 Apr 2017


Article type: Paper
DOI: 10.1039/C7FD00130D
Citation: Faraday Discuss., 2017, Accepted Manuscript
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    Plasmonic response and SERS modulation in electrochemical applied potentials

    G. DiMartino, V. Turek, C. Tserkezis, A. Lombardi, A. Kuhn and J. J. Baumberg, Faraday Discuss., 2017, Accepted Manuscript , DOI: 10.1039/C7FD00130D

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