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

author：

Yang, W. (Yang, W..) ^[1] | Gooding, J.J. (Gooding, J.J..) ^[2] | He, Z. (He, Z..) ^[3] | Li, Q. (Li, Q..) ^[4] | Chen, G. (Chen, G..) ^[5]

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Abstract：

This　communication　reports　an　efficient　visual　detection　method　of　Cu　2+　by　L-cysteine　functionalized　gold　nanoparticles　in　aqueous　solution.　Upon　exposure　to　Cu　2+,　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　Cu　2+　down　to　the　concentration　range　of　10　-5　M.　Recognition　of　Cu　2+　and　formation　of　the　aggregates　are　proposed　to　occur　via　a　2　:1　sandwich　complex　between　L-cysteine　and　Cu　2+.　Copyright　©　2007　American　Scientific　Publishers　All　rights　reserved.

Keyword：

Biomimetics; Biosensors; Diagnostics; Nanoparticles; Self-assembly

Community：

[ 1 ] [Yang, W.]School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
[ 2 ] [Gooding, J.J.]School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
[ 3 ] [He, Z.]School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia
[ 4 ] [Li, Q.]School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia
[ 5 ] [Chen, G.]Ministry of Education, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China

Reprint 's Address：

[Yang, W.]School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia

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Source ：

Journal of Nanoscience and Nanotechnology

ISSN： 1533-4880

Year： 2007

Issue： 2

Volume： 7

Page： 712-716

1 . 9 8 7

JCR@2007

1 . 1 3 4

JCR@2019

JCR Journal Grade：1

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ESI Highly Cited Papers on the List： 0 Unfold All

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