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. 2017 Oct 27;7:14240. doi: 10.1038/s41598-017-14694-1

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The optical response of the fabricated flexible gold nanocups platforms together with their SERS efficiency. (A) Measured (solid spectra) and simulated (dotted spectra) reflectance of Au PDMS PS 527, Au PDMS PS 600 and Au PDMS PS 719. (B) Schematic illustration of the Au PDMS PS 719 substrates considered in simulation together with the distribution of the electromagnetic field intensity (E/E₀)² for Au PDMS PS 719 at 633 nm. E₀ is the incident light and it is equal to 1. (C) SERS spectra of 4-MBA adsorbed on the flexible plasmonic nanocups with different diameters: Au PDMS PS 527 (green spectrum), Au PDMS PS 600 (blue spectrum), Au PDMS PS 719 (red spectrum) and Au PDMS PS 836 (magenta spectrum) with excitation laser at 633 nm.