Colorimetric and visual detection of mercury(II) based on the suppression of the interaction of dithiothreitol with agar-stabilized silver-coated gold nanoparticles

被引:23
作者
Da, Qiang [1 ]
Gu, Yuanyuan [1 ]
Peng, Xiafeng [2 ]
Zhang, Liying [1 ]
Du, Shuhu [1 ]
机构
[1] Nanjing Med Univ, Sch Pharm, Nanjing 211166, Jiangsu, Peoples R China
[2] Nanjing Med Univ, Sch Basic Med Sci, Nanjing 211166, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Gel probe; Visual detection; Core-shell nanoparticles; Thiophilicity; Thiol-Ag chemistry; Mercuric ion; CORE-SHELL NANOPARTICLES; CARBON DOTS; NANORODS; SPECTROMETRY; FABRICATION; PEROXIDASE; SAMPLES; IONS;
D O I
10.1007/s00604-018-2899-y
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A colorimetric and visual method is described for the determination of mercury(II) ion. A gel consisting of agar-stabilized silver-coated gold nanoparticles (Au@Ag NPs) was prepared. The reaction with dithiothreitol (DTT) via thiol-Ag chemistry results in an orange to purple color change of the gel. However, in the presence of Hg(II), the reaction of DTT with the silver shells is suppressed due to the strong thiophilicity of Hg(II). The color of the gel changes from purple to red to orange in the presence of increasing concentrations of Hg(II). The Au@Ag NPs therefore are a viable optical probe for Hg(II) which can be detected in concentration as low as 78 nM via dual-wavelength ratiometric absorbance (A(390)/A(520)), and at 1 mu M levels with bare eyes. The use of agar as a support is mandatory to prevent the aggregation of the NPs and also improves selectivity. The method was applied to the analysis of spiked samples, and recoveries ranged between 96.3 and 104%. The assay is easy, inexpensive, and in our perception represents an attractive tool for on-site visual detection of Hg(II).
引用
收藏
页数:9
相关论文
共 33 条
[1]   Determination of subnanomolar levels of mercury (II) by using a graphite paste electrode modified with MWCNTs and Hg(II) -imprinted polymer nanoparticles [J].
Alizadeh, Taher ;
Hamidi, Negin ;
Ganjali, Mohamad Reza ;
Rafiei, Faride .
MICROCHIMICA ACTA, 2018, 185 (01)
[2]   Stability of Self-Ordered Thiol-Coated Silver Nanoparticles: Oxidative Environment Effects [J].
Andrieux-Ledier, Amandine ;
Tremblay, Benoit ;
Courty, Alexa .
LANGMUIR, 2013, 29 (43) :13140-13145
[3]   Silver-doped CdS quantum dots incorporated into chitosan-coated cellulose as a colorimetric paper test stripe for mercury [J].
Butwong, Nutthaya ;
Kunthadong, Pimpanitpa ;
Soisungnoen, Phimpha ;
Chotichayapong, Chatrachatchaya ;
Srijaranai, Supalax ;
Luong, John H. T. .
MICROCHIMICA ACTA, 2018, 185 (02)
[4]   Stability of Ag nanoparticles fabricated by electron beam lithography [J].
Cao, Wei ;
Elsayed-Ali, Hani E. .
MATERIALS LETTERS, 2009, 63 (26) :2263-2266
[5]   A Supersensitive Probe for Rapid Colorimetric Detection of Nickel Ion Based on a Sensing Mechanism of Anti-etching [J].
Chen, Ningyi ;
Zhang, Yujie ;
Liu, Hongyu ;
Ruan, Huimin ;
Dong, Chen ;
Shen, Zheyu ;
Wu, Aiguo .
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2016, 4 (12) :6509-6516
[6]   Fine tuning the optical properties of Au-Ag nanocages by selectively etching Ag with oxygen and a water-soluble thiol [J].
Cho, Eun Chul ;
Cobley, Claire M. ;
Rycenga, Matthew ;
Xia, Younan .
JOURNAL OF MATERIALS CHEMISTRY, 2009, 19 (35) :6317-6320
[7]   Trimeric Plasmonic Molecules: The Role of Symmetry (vol 11, pg 2440, 2011) [J].
Chuntonov, Lev ;
Haran, Gilad .
NANO LETTERS, 2011, 11 (10) :4503-4503
[8]   Atomic absorption spectroscopy for mercury, automated by sequential injection and miniaturized in lab-on-valve system [J].
Erxleben, H ;
Ruzicka, J .
ANALYTICAL CHEMISTRY, 2005, 77 (16) :5124-5128
[9]   Gold nanoparticle-based colorimetric ELISA for quantification of ractopamine [J].
Han, Shuaijuan ;
Zhou, Tianjiao ;
Yin, Bingjie ;
He, Pingli .
MICROCHIMICA ACTA, 2018, 185 (04)
[10]   In vivo retention of ingested Au NPs by Daphnia magna: No evidence for trans-epithelial alimentary uptake [J].
Khan, Farhan R. ;
Kennaway, Gabrielle M. ;
Croteau, Marie-Noele ;
Dybowska, Agnieszka ;
Smith, Brian D. ;
Nogueira, Antonio J. A. ;
Rainbow, Philip S. ;
Luoma, Samuel N. ;
Valsami-Jones, Eugenia .
CHEMOSPHERE, 2014, 100 :97-104