Ag-decorated polymer chip for the determination of the respective concentrations of TTD and Hg2+ by surface-enhanced raman scattering

被引：0

作者：

Yang, Bo ^{[1
]}

Wang, Ye ^{[1
]}

Jin, Sila ^{[2
]}

Guo, Shuang ^{[2
]}

Park, Eungyeong ^{[2
]}

Shin, Jin Y. ^{[3
]}

Zhang, Weiyu ^{[1
]}

Jung, Young Mee ^{[2
]}

机构：

[1] Changchun Univ Chinese Med, Sch Pharmaceut Sci, Changchun 130117, Peoples R China

[2] Kangwon Natl Univ, Inst Mol Sci & Fus Technol, Dept Chem, Chunchon 24341, South Korea

[3] CUNY, Dept Chem & Environm Sci, Medgar Evers Coll, Brooklyn, NY 11210 USA

来源：

ANALYST | 2022年 / 147卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

MERCURY; SILVER; IONS;

D O I：

10.1039/d1an02292j

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A "hotspot"-rich Ag-nanoparticle-decorated three-dimensional polymer substrate was fabricated, exhibiting an excellent surface-enhanced Raman scattering (SERS) activity. 4-Mercaptobenzoic acid (MBA) was selected as a probe molecule for comparing the SERS activity on selected substrates. The proposed detection chip with the adsorption of tetramethylthiuram disulfide (TTD) shows an excellent sensitivity for the quantitative determination of TTD and mercury ions (Hg2+). This chip exhibited a high sensitivity for the trace detection of the targets. Interestingly, we found that the adsorbed TTD is selectively sensitive to Hg2+. The SERS band had a significant frequency shift of 11 cm(-1) as the concentration of Hg2+ increased from 10(-10) to 10(-3) mol L-1. More importantly, the frequency shift of the SERS band exhibited an excellent linear relationship with the concentration of Hg2+, and the determination limit for Hg2+ was 10(-10) mol L-1. Furthermore, the proposed detection chip shows great application potential for the determination of pesticides and Hg2+.

引用

页码：597 / 603

页数：8

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