Rapid and selective detection of trace Cu2+ by accumulation- reaction-based Raman spectroscopy

被引：42

作者：

Liu, Ying ^{[1
,2
]}

Wu, Yiping ^{[1
,2
]}

Guo, Xiaoyu ^{[1
,2
]}

Wen, Ying ^{[1
,2
]}

Yang, Haifeng ^{[1
,2
]}

机构：

[1] Shanghai Normal Univ, Shanghai Municipal Educ Comm, Key Lab Resource Chem,Key Lab Mol Imaging Probes, Shanghai Key Lab Rare Earth Funct Mat,Educ Minist, Shanghai 200234, Peoples R China

[2] Shanghai Normal Univ, Dept Chem, Shanghai 200234, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2019年 / 283卷

基金：

中国国家自然科学基金;

关键词：

L-cysteine; Inositol hexaphosphate; Silver nanoparticles; Raman; Trace Cu2+; CU(II) ION; L-CYSTEINE; COPPER; SERS; NANOPARTICLES;

D O I：

10.1016/j.snb.2018.12.043

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Developing detection method for trace copper ions (Cu2+) has attracted great attention since Cu2+ ions would threaten to human health, including cellular toxicity, liver damage, and neuro degenerative diseases. In this work, adding L-cysteine (L-Cys) into inositol hexaphosphate (IP6) modified Ag nanoparticles (designated as L-Cys/IP6@Ag) induces the certain aggregation of nanoparticles, resulting in increasng the surface enhanced Raman scattering (SERS) signal of rhodamine 6 G (R6 G). The presence of Cu2+ ions could be adsorbed by IP6 and the concentrated Cu2+ ions could further selectively oxide Cys molecules under certain pH value, which disperses the IP6@Ag again and decreases the SERS signal of R6 G. The linear range of determination of Cu2+ ions is from 10(-5) to 10(-1)degrees M as well as a low detection concentration is of 10 pM. Furthermore, the L-Cys/IP6@Ag-R6 G-based SERS sensor has been successfully applied to detect trace Cu2+ in river water.

引用

页码：278 / 283

页数：6

共 32 条

[1] RAMAN-SPECTROSCOPY AS AN INDICATOR OF CU-S BOND-LENGTH IN TYPE-1 AND TYPE-2 COPPER CYSTEINATE PROTEINS [J].