A fluorescent sensor array based on silver nanoclusters for identifying heavy metal

被引：50

作者：

Cao, Nan ^{[1
]}

Xu, Jinming ^{[1
]}

Zhou, Huangmei ^{[1
]}

Zhao, Yu ^{[1
]}

Xu, Jianhua ^{[1
]}

Li, Jianfeng ^{[2
]}

Zhang, Sanjun ^{[1
,3
,4
]}

机构：

[1] East China Normal Univ, State Key Lab Precis Spect, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China

[2] Xiamen Univ, Coll Chem & Chem Engn, MOE Key Lab Spectrochem Anal & Instrumentat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Optic, Taiyuan 030006, Shanxi, Peoples R China

[4] NYU Shanghai, NYU ECNU Inst Phys, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China

来源：

MICROCHEMICAL JOURNAL | 2020年 / 159卷

基金：

中国国家自然科学基金;

关键词：

Fluorescent sensor array; Ag nanoclusters; Principal component analysis; Heavy metal ions; GOLD NANOPARTICLES; AMINO-ACIDS; TURN-ON; COLORIMETRIC DETECTION; PATTERN-RECOGNITION; SENSITIVE DETECTION; QUANTUM DOTS; PROTEINS; IONS; DISCRIMINATION;

D O I：

10.1016/j.microc.2020.105406

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The rapid, simple and reliable identification of heavy metal ions has attracted increasing attention of researchers. This work constructed a fluorescent sensor array by using 4 kinds of polymer templated silver nanoclusters (Ag NCs) as the sensing elements. This sensor array can be used for identifying 7 kinds of heavy metal ions including Pb2+, Fe3+, Cu2+, Cd2+, Cr3+, Co2+ and Ni2+. The fluorescence intensity ratios of Ag NCs after and before adding metal ions were applied as the output signals. We used principal component analysis (PCA) to reduce the dimensions of data variables and obtained a PCA scatter plot that could clearly distinguish every kind of 7 metal ions. This sensor array had a good performance when the ions concentration was in the range of 15-800 mu M at pH of 7. The sensor array could also clearly discriminate these 7 heavy metal ions spiked in tap water. The Ag NCs-based sensor array could also be used as a fluorescence lifetime sensor array for the discrimination of metal ions. Taken all together, the developed sensor array holds great promise for practical analysis in the environment.

引用

页数：8

共 46 条

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