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Authors Mayer, M. ; Tebbe, M. ; Kuttner, C. ; Schnepf, M. J. ; König, T. ; Fery, A.
Title Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces
Date 22.02.2016
Number 49284
Abstract We demonstrate a template-assisted colloidal self-assembly approach for magnetic metasurfaces on macroscopic areas. The choice of anisotropic colloidal particle geometry, assembly pattern and metallic film is based on rational design criteria, taking advantage of mirror-charge effects for gold nanorods placed on gold film. Monodisperse gold nanorods prepared utilizing wet-chemistry are arranged with high precision on wrinkled templates to form linear array-type assemblies and subsequently transferred to a thin gold film. Due to the obtained particle-to-film distance of 1.1 nm, the plasmonic mode of the nanorod is able to couple efficiently with the supporting metallic film, giving rise to a magnetic mode in the visible spectrum (721 nm). Conventional UV-vis-NIR measurements in close correlation with electromagnetic simulations provide evidence for the presence of a magnetic resonance on macroscopic area. The herein presented scalable lithography-free fabrication process paves the road towards colloidal functional metasurfaces with an optical response in the effective magnetic permeability.
Publisher Faraday Discussions
Wikidata
Citation Faraday Discussions 2016 (2016) 159-176
DOI https://doi.org/10.1039/C6FD00013D
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