期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 242, 期 -, 页码 1272-1280出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.09.032
关键词
Carbon dots; N- and S-co-doped; Temperature sensor; Fe3+
资金
- National Nature Science Foundation of China [61134010, 61304242, 61327804, 61520106003]
- Program for Chang Jiang Scholars and Innovative Research Team in University [IRT13018]
- National High-Tech Research and Development Program of China [2014AA06A505]
- China Postdoctoral Science Foundation [2013M530979]
- Science and Technology Development Program of Jilin Province [20150520091JH]
In this paper, we synthesized a new kind of dual functional nitrogen- and sulfur-co-doped carbon dots(C-dots) which could be applied as the fluorescent temperature sensor and the probe of trace amounts of Fe3+ ions via an one-pot facile hydrothermal approach from acrylic acid and methionine. The obtained C-dots with the average diameter of 2.3 nm manifested colorful fluorescence, good-solubility and attractive optical stability. The fluorescence lifetime is 7.92 ns. Although the quantum yield is 10.55%, the fluorescence can be fleetly and selectively quenched by Fe3+ ions. The detection limit was as low as 1.72 nM. In addition, high ionic strength, mild acids and alkaline only own a small impact on the fluorescence intensity of the C-dots. Furthermore, the C-dots could be deemed as a temperature sensor with significant reversibility, sensitivity and linearity. Meanwhile, the C-dots also possessed great recoverable and thermal stable fluorescence as expected. (C) 2016 Elsevier B.V. All rights reserved.
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