Repository logo
 

Tracking Nanoelectrochemistry Using Individual Plasmonic Nanocavities.

Accepted version
Peer-reviewed

No Thumbnail Available

Type

Article

Change log

Authors

Turek, VA 
Lombardi, A 
de Nijs, B 

Abstract

We study in real time the optical response of individual plasmonic nanoparticles on a mirror, utilized as electrodes in an electrochemical cell when a voltage is applied. In this geometry, Au nanoparticles are separated from a bulk Au film by an ultrathin molecular spacer. The nanoscale plasmonic hotspot underneath the nanoparticles locally reveals the modified charge on the Au surface and changes in the polarizability of the molecular spacer. Dark-field and Raman spectroscopy performed on the same nanoparticle show our ability to exploit isolated plasmonic junctions to track the dynamics of nanoelectrochemistry. Enhancements in Raman emission and blue-shifts at a negative potential show the ability to shift electrons within the gap molecules.

Description

Keywords

Electrochemistry, dark field spectroscopy, plasmonics, self-assembled monolayer, surface-enhanced Raman spectroscopy

Journal Title

Nano Lett

Conference Name

Journal ISSN

1530-6984
1530-6992

Volume Title

17

Publisher

American Chemical Society (ACS)
Sponsorship
European Research Council (320503)
Engineering and Physical Sciences Research Council (EP/L027151/1)
Engineering and Physical Sciences Research Council (EP/G060649/1)
Engineering and Physical Sciences Research Council (EP/G037221/1)
EPSRC grant EP/G060649/1, EP/L027151/1, EP/G037221/1, EP/N020669/1, EPSRC NanoDTC, and ERC grant LINASS 320503