Fast colorimetric detection of copper ions using L-cysteine functionalized gold nanoparticles

被引：2
|
作者：
Yang, Wenrong [1 ]
Gooding, J. Justin
He, Zhicong
Li, Qiong
Chen, Guonan
机构：
[1] Univ New S Wales, Sch Chem, Sydney, NSW 2052, Australia
[2] Univ New S Wales, Sch Med Sci, Sydney, NSW 2052, Australia
[3] Fuzhou Univ, Minist Educ, Key Lab Anal & Detect Technol Food Safety, Fuzhou 350002, Fujian, Peoples R China
[4] Fuzhou Univ, Dept Chem, Fuzhou 350002, Fujian, Peoples R China
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2007年 / 7卷 / 02期
关键词：
biosensors; biomimetics; diagnostics; nanoparticles; self-assembly;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This communication reports an efficient visual detection method of Cu2+ by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu2+, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu2+ down to the concentration range of 10(-5) M. Recognition of Cu2+ and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu2+.
引用
收藏
页码：712 / 716
页数：5
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