An auxetic thermo-responsive nanoplasmonic optical switch.
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Development and use of metamaterials have been gaining prominence in large part due to the possibility of creating platforms with 'disruptive' and unique optical properties. However, to date the majority of such systems produced using micro or nanotechnology, are static and can only perform certain target functions. Next-generation multifunctional smart optical metamaterials are expected to have tuneable elements with the possibility of controlling the optical properties in real time via variation in parameters such as pressure, mechanical stress, voltage, or through non-linear optical effects. Here, we address this challenge by developing a thermally controlled optical switch, based on the self-assembly of poly(N-isopropylacrylamide)-functionalised gold nanoparticles on a planar macroscale gold substrate. We show that such meta-surfaces can be tuned to exhibit substantial changes in the optical properties both in terms of wavelength and intensity, through the temperature-controlled variation of the interparticle distance within the nanoparticle monolayer as well as its separation from the substrate. This change is based on temperature induced auxetic expansion and contraction of the functional ligands. Such a system has potential for numerous applications, ranging from thermal sensors to regulated light harnessing.
Date Issued
2019-05-28
Date Acceptance
2019-05-28
Citation
ACS Applied Materials and Interfaces, 2019
ISSN
1944-8244
Publisher
American Chemical Society
Journal / Book Title
ACS Applied Materials and Interfaces
Copyright Statement
© 2019 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acsami.9b05530.
Sponsor
Commission of the European Communities
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/31134791
Grant Number
724300
Subjects
0904 Chemical Engineering
0303 Macromolecular and Materials Chemistry
0306 Physical Chemistry (incl. Structural)
Nanoscience & Nanotechnology
Publication Status
Published online
Coverage Spatial
United States
Article Number
acsami.9b05530
Date Publish Online
2019-05-28