Journal
TALANTA
Volume 144, Issue -, Pages 642-647Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2015.07.022
Keywords
Fluorescence probe; Copper nanoclusters; Melamine
Categories
Funding
- National Instrumentation Program of China [2011YQ17006711]
- Major Program of NSFC [21190044]
- NSFC Scientific Equipment Joint Fund Project [11179004]
- NSFC Innovative Research Group Project [21121091]
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In this work, poly-thymine stabilized copper nanoclusters have been used as a fluorescence probe for melamine sensing for the first time. Melamine can bind to thymine through hydrogen bond, which could dramatically enhance the fluorescence intensity of poly-thymine stabilized copper nanoclusters. The enhancement factors (I-I-0)/I-0 increase linearly with the lgc(melamine) over the melamine concentration range of 0.1 mu M to 6 mu M. The detection limit of melamine is 95 nM, which is 200 times lower than the US Food and Drug Administration estimate melamine safety limit 20 mu M. Melamine in milk was detected with good recovery, which suggested that this novel fluorescence probe has great potential in practical application. (C) 2015 Elsevier B.V. All rights reserved.
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