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Issue 2, 2019
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High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films

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Abstract

Materials with a high and tunable refractive index are attractive for nanophotonic applications. In this contribution, we propose a straightforward fabrication technique of high-refractive index surfaces based on self-assembled nanostructured block copolymer thin films. The selective and customizable metal incorporation within out-of-plane polymer lamellae produces azimuthally isotropic metallic nanostructures of defined geometries, which were analysed using microscopy and small-angle X-ray scattering techniques. Variable-angle spectroscopic ellipsometry was used to relate the geometrical parameters of the metallic features and the resulting refractive index of the patterned surfaces. In particular, nanostructured gold patterns with a high degree of homogeneity and a gold content as low as 16 vol% reach a refractive index value of more than 3 in the visible domain. Our study thus demonstrates a new route for the preparation of high refractive index surfaces with a low metal content for optical applications.

Graphical abstract: High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films

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Publication details

The article was received on 24 Sep 2018, accepted on 21 Nov 2018 and first published on 22 Nov 2018


Article type: Paper
DOI: 10.1039/C8NA00239H
Citation: Nanoscale Adv., 2019,1, 849-857
  • Open access: Creative Commons BY license
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    High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films

    A. Alvarez-Fernandez, K. Aissou, G. Pécastaings, G. Hadziioannou, G. Fleury and V. Ponsinet, Nanoscale Adv., 2019, 1, 849
    DOI: 10.1039/C8NA00239H

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