期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 192, 期 -, 页码 488-495出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.11.041
关键词
Carbon dots; Fluorescence; Mercury ions detection; Carboxyl groups; Heteroatom doping
资金
- National Natural Science Foundation of China [21174103, 21374078, 31200719]
Based on two kinds of hetero atom doping carbon dots (CD-1, CD-2) with brilliant fluorescent quantum yield and other fluorescence properties, two new sensors were prepared and characterized as novel fluorescent probes for detecting mercury ions in pure aqueous solution with a broad pH. Mercury ions can be captured by the carboxyl groups of these two kinds of carbon dots to form nonfluorescent complexes, resulting in a strong quenching. It suggested that both CD-1 and CD-2 exhibited high sensitivity and selectivity toward mercury ions: the linear ranges of CD-1 and CD-2 were estimated to be 1-12 mu M and 1-15 mu M while the limit of detection (LOD) was calculated to be 226 nM and 845 nM, respectively. Furthermore, these two kinds of CDs were applied to intracellular sensing and imaging of mercury ions as a consequence of the fluorescence properties and the established low cytotoxicity. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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