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. 2018 Sep 7;9:3642. doi: 10.1038/s41467-018-05920-z

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© The Author(s) 2018

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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Fig. 7 — Effect of GNR concentrations on SERS performance. a Optical images of as-synthesized GNR sols and metal liquid-like GNR arrays on O-in-W interface fabricated by 1 mL of GNR sols with variable OD values: 3.0, 4.5, 6.0, 7.5, and 9.0, respectively. b The corresponding UV–Vis absorbance spectra, c relative SERS strength, r_780/662, collected on interfacial GNR arrays, and d statistical histograms of r_780/662 and I₇₈₀, respectively. The error bars represent the statistical RSD and were calculated from triplicate SERS experiments