Volume 186, 2016

Modular, polymer-directed nanoparticle assembly for fabricating metamaterials

Abstract

We achieve the fabrication of plasmonic meta-atoms by utilizing a novel, modular approach to nanoparticle self-assembly that utilizes polymer templating to control meta-atom size and geometry. Ag nanocubes are deposited and embedded into a polymer thin-film, where the polymer embedding depth is used to dictate which nanocube faces are available for further nanocrystal binding. Horizontal and vertical nanocube dimers were successfully fabricated with remarkably high yield using a bifunctional molecular linker to bind a second nanocube. Surface plasmon coupling can be readily tuned by varying the size, shape, and orientation of the second nanoparticle. We show that meta-atoms can be fabricated to exhibit angle- and polarization-dependent optical properties. This scalable technique for meta-atom assembly can be used to fabricate large-area metasurfaces for polarization- and phase-sensitive applications, such as optical sensing.

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
01 sep 2015
Accepted
14 sep 2015
First published
14 sep 2015

Faraday Discuss., 2016,186, 489-502

Author version available

Modular, polymer-directed nanoparticle assembly for fabricating metamaterials

G. K. Laxminarayana, M. Rozin, S. Smith and A. R. Tao, Faraday Discuss., 2016, 186, 489 DOI: 10.1039/C5FD00134J

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