Journal
MATERIALS RESEARCH BULLETIN
Volume 48, Issue 7, Pages 2529-2534Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.03.015
Keywords
Optical materials; Chemical synthesis; Optical properties
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Funding
- National Basic Research Program of China (973 Program) [2012CB825800, 2013CB932702]
- National Natural Science Foundation of China [51132006, 21073127, 21071104]
- Specialized Research Fund for the Doctoral Program of Higher Education [20123201110018]
- Suzhou Planning Project of Science and Technology [ZXG2012028]
- Foundation for the Author of National Excellent Doctoral Dissertation of China [200929]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Fluorescent carbon dots (FCDs) were efficiently synthesized by one-step sodium hydroxide-assisted reflux method from poly(ethylene glycol) (PEG). The obtained FCDs exhibit excellent water-solubility and high stability. Under the UV irradiation, the FCDs could emit bright blue photoluminescence, and also they were found to show excellent up-conversion fluorescence. It was further demonstrated that such FCDs can serve as effective fluorescent sensing platform for Hg2+ ions detection with ultra-sensitivity and selectivity. The sensing system achieved a limit of detection as low as 1 fM, which is much lower than all the previous reported sensing systems for He ions detection. This FCDs sensing system has been successfully applied for the analysis of Hg2+ ions in water samples from river, lake, and tap water, showing good practical feasibility. (C) 2013 Elsevier Ltd. All rights reserved.
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