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. 2017 Oct 12;7:13066. doi: 10.1038/s41598-017-13577-9

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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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SERS detection of melamine and NaSCN using the synthesized core-satellite nanostructures. (a) SERS spectra of melamine in water with concentrations ranging from 0.5 μM to 100 μM. (b) A plot of the intensity of the Raman peak at 703 cm⁻¹ versus melamine concentration (n = 10 per concentration). Error bars, SD. (c) SERS spectra of NaSCN in water with concentrations ranging from 0.1 μM to 25 μM. (d) A plot of the intensity of the Raman peak at 2109 cm⁻¹ versus NaSCN concentration (n = 10 per concentration). Error bars, SD. (e) SERS spectra of milk samples spiked with different concentrations of melamine (blank, 1 μM, 10 μM, and 100 μM). The inset in (e) shows the intensities of the Raman peak at 703 cm⁻¹ versus melamine concentration (n = 10 per concentration). Error bars, SD. (f) SERS spectra of milk samples spiked with different concentrations of NaSCN (blank, 0.1 μM, 1 μM, and 10 μM). The inset in (f) shows the intensities of the Raman peak at 2109 cm⁻¹ versus NaSCN concentration (n = 10 per concentration). Error bars, SD.