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Open AccessArticle

Preparation of Selective and Reproducible SERS Sensors of Hg2+ Ions via a Sunlight-Induced Thiol–Yne Reaction on Gold Gratings

1
Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
2
Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian
3
ICMPE (UMR 7182), CNRS, UPEC, Université Paris Est, F-94320 Thiais, France
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(9), 2110; https://doi.org/10.3390/s19092110
Received: 11 April 2019 / Revised: 30 April 2019 / Accepted: 2 May 2019 / Published: 7 May 2019
(This article belongs to the Special Issue Advanced Sensors for the Detection of Heavy Metals)
In this contribution, we propose a novel functional surface-enhanced Raman spectroscopy (SERS) platform for the detection of one of the most hazardous heavy metal ions, Hg2+. The design of the proposed sensor is based on the combination of surface plasmon-polariton (SPP) supporting gold grating with the high homogeneity of the response and enhancement and mercaptosuccinic acid (MSA) based specific recognition layer. For the first time, diazonium grafted 4-ethynylphenyl groups have undergone the sunlight-induced thiol–yne reaction with MSA in the presence of Eosine Y. The developed SERS platform provides an extremely sensitive, selective, and convenient analytical procedure to detect mercury ions with limit of detection (LOD) as low as 10−10 M (0.027 µg/L) with excellent selectivity over other metals. The developed SERS sensor is compatible with a portable SERS spectrophotometer and does not require the expensive equipment for statistical methods of analysis. View Full-Text
Keywords: SERS; surface modification; Hg2+ sensors; water analysis SERS; surface modification; Hg2+ sensors; water analysis
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MDPI and ACS Style

Guselnikova, O.; Svorcik, V.; Lyutakov, O.; Chehimi, M.M.; Postnikov, P.S. Preparation of Selective and Reproducible SERS Sensors of Hg2+ Ions via a Sunlight-Induced Thiol–Yne Reaction on Gold Gratings. Sensors 2019, 19, 2110.

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