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Electrotunable nanoplasmonic liquid mirror

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Title: Electrotunable nanoplasmonic liquid mirror
Authors: Montelongo, Y
Sikdar, D
Ma, Y
McIntosh, AJS
Velleman, L
Kucernak, AR
Edel, JB
Kornyshev, AA
Item Type: Journal Article
Abstract: Recently, there has been a drive to design and develop fully tunable metamaterials for applications ranging from new classes of sensors to superlenses among others. Although advances have been made, tuning and modulating the optical properties in real time remains a challenge. We report on the first realization of a reversible electrotunable liquid mirror based on voltage-controlled self-assembly/disassembly of 16 nm plasmonic nanoparticles at the interface between two immiscible electrolyte solutions. We show that optical properties such as reflectivity and spectral position of the absorption band can be varied in situ within ±0.5 V. This observed effect is in excellent agreement with theoretical calculations corresponding to the change in average interparticle spacing. This electrochemical fully tunable nanoplasmonic platform can be switched from a highly reflective ‘mirror’ to a transmissive ‘window’ and back again. This study opens a route towards realization of such platforms in future micro/nanoscale electrochemical cells, enabling the creation of tunable plasmonic metamaterials.
Issue Date: 11-Sep-2017
Date of Acceptance: 2-Aug-2017
URI: http://hdl.handle.net/10044/1/50330
DOI: https://dx.doi.org/10.1038/nmat4969
ISSN: 1476-1122
Publisher: Nature Publishing Group
Start Page: 1127
End Page: 1135
Journal / Book Title: Nature Materials
Volume: 16
Copyright Statement: © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved
Sponsor/Funder: Commission of the European Communities
Engineering & Physical Science Research Council (E
Imperial College Trust
Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Commission of the European Communities
Funder's Grant Number: 279818
Keywords: MD Multidisciplinary
Nanoscience & Nanotechnology
Publication Status: Published
Appears in Collections:Chemistry
Faculty of Natural Sciences

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