Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 245, Issue -, Pages 868-874Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.02.014
Keywords
N-C dots; Solid phase pyrolysis; Fe3+; Fluorescence sensing; Cell imaging
Funding
- National Nature Scientific Foundation of China [21375112]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13036]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521004]
- Marine high-tech industry development projects of Fujian Province [2015-19]
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Highly fluorescent nitrogen-doped carbon dots (N-C dots) were prepared by an one-pot solid phase pyrolysis method using guanidinium chloride and citric acid as the catalyst, nitrogen and carbon source without any solvents. The synthesized N-C dots emitted intense blue fluorescence with high photostability and stability in high ionic strength. Under optimal conditions, determination for Fe3+ could be completed in 10 min with a wide linearity from 0 to 200 p.M and a detection limit of 100 nM. The proposed method showed potential applications for Fe3+ detection in real samples. Moreover, the N-C dots were explored for cell imaging with excellent biocompatibility and stability, suggesting their great potential in bioimaging. (C) 2017 Elsevier B.V. All rights reserved.
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