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Volume 205, 2017
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Plasmonic response and SERS modulation in electrochemical applied potentials

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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 an 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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Article information


Submitted
11 Apr 2017
Accepted
26 Apr 2017
First published
27 Apr 2017

This article is Open Access

Faraday Discuss., 2017,205, 537-545
Article type
Paper

Plasmonic response and SERS modulation in electrochemical applied potentials

G. Di Martino, V. A. Turek, C. Tserkezis, A. Lombardi, A. Kuhn and J. J. Baumberg, Faraday Discuss., 2017, 205, 537
DOI: 10.1039/C7FD00130D

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