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

Yang, Wenrong, Gooding, J. Justin, He, Zhicong, Li, Qiong and Chen, Guonan 2007, Fast colorimetric detection of copper ions using L-Cysteine functionalized gold nanoparticles, Journal of nanoscience and nanotechnology, vol. 7, no. 2, pp. 712-716.

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Title Fast colorimetric detection of copper ions using L-Cysteine functionalized gold nanoparticles
Author(s) Yang, WenrongORCID iD for Yang, Wenrong orcid.org/0000-0001-8815-1951
Gooding, J. Justin
He, Zhicong
Li, Qiong
Chen, Guonan
Journal name Journal of nanoscience and nanotechnology
Volume number 7
Issue number 2
Start page 712
End page 716
Publisher American Scientific Publishers
Place of publication Stevenson Ranch, Calif.
Publication date 2007-02
ISSN 1533-4880
1533-4899
Summary 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+.
Language eng
Field of Research 100703 Nanobiotechnology
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, American Scientific Publishers
Persistent URL http://hdl.handle.net/10536/DRO/DU:30034978

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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Created: Mon, 30 May 2011, 10:55:35 EST

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