Yang, Wenrong and Gooding, J. Justin and He, Zhicong and Li, Qiong and Chen, Guonan (2007) Fast colorimetric detection of copper ions using L-cysteine functionalized gold nanoparticles. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 7 (2). pp. 712-716.
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Abstract
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+.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | biosensors; biomimetics; diagnostics; nanoparticles; self-assembly |
| Subjects: | Analytical Science > Nanotechnology for sensing and actuating Physical Science > Nano objects Material Science > Nanochemistry |
| ID Code: | 2650 |
| Deposited By: | Anuj Seth |
| Deposited On: | 09 Jan 2009 12:00 |
| Last Modified: | 20 Jan 2009 11:07 |
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