期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 253, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2021.119583
关键词
Carbon quantum dots; Fluorescent sensing; Bioimaging; Anti-counterfeiting
类别
资金
- National Natural Science Foundation of China [21875144, 21802097]
- Shenzhen Science and Technology Research Grant [JCYJ20200109105003940]
- Natural Science Foundation of Guangdong Province [2018A030313758]
Nitrogen-doped carbon quantum dots (N-CQDs) with strong blue fluorescence and absolute quantum yield of 92.1% were successfully synthesized in this study. The N-CQDs demonstrated outstanding fluorescence stability, high selectivity, and anti-interference in Hg2+ detection.
The exploration of carbon quantum dots (CQDs) with ultra-high quantum yield, simple synthesis path, and satisfying output to facilitate their wide applications in numerous fields are always the research focus. In this work, nitrogen-doped carbon quantum dots (N-CQDs) with strong blue fluorescence were synthesized with a simple one-step hydrothermal method using citric acid and o-phenylenediamine as raw materials, and the absolute quantum yield was as high as 92.1%. The detailed research results demonstrate that the N-CQDs have outstanding fluorescence stability, high selectivity, and anti-interference in Hg2+ detection. The obtained N-CQDs also possess excellent biocompatibility, which can also be successfully applied in cell imaging and intracellular Hg2+ detection. Most importantly, due to their high quantum yield and excellent dispersibility, the N-CQDs solution can be used as a quick-drying fluorescent ink for ink-jet printing. Therefore, the as-prepared N-CQDs have great potential in fluorescence sensing, biomedical diagnosis, data encryption, and anti-counterfeiting. (C) 2021 Elsevier B.V. All rights reserved.
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