Fabrication of carbon dots for sequential on–off-on determination of Fe3+ and S2− in solid-phase sensing and anti-counterfeit printing

Glutathione and 2-aminopyridine are used as carbon sources to prepare carbon dots (CDs) by a one-step hydrothermal reaction. The results show that the average particle diameter of CDs is 8.64 nm with uniform size distribution and the fluorescence quantum yield is 13.62%. We further demonstrate that...

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Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2021-12, Vol.413 (30), p.7473-7483
Main Authors: Zhao, Huaqi, Jin, Xilang, Zhou, Hongwei, Yang, Zheng, Bai, Haiyan, Yang, Jin, Li, Yulong, Ma, Yiting, She, Mengyao
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Carbon
Carbon dots
Carbon sources
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Counterfeit
Fabrication
Filter paper
Fluorescence
Food Science
Glutathione
Hydrogels
Hydrothermal reactions
Iron
Laboratory Medicine
Monitoring/Environmental Analysis
Particle size distribution
Research Paper
Size distribution
Solid phases
Toxicity
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Summary:Glutathione and 2-aminopyridine are used as carbon sources to prepare carbon dots (CDs) by a one-step hydrothermal reaction. The results show that the average particle diameter of CDs is 8.64 nm with uniform size distribution and the fluorescence quantum yield is 13.62%. We further demonstrate that novel CDs possess highly selective sensing of Fe 3+ from 0.2 to 200 μM with a low detection limit (0.194 μM). Meanwhile, the fluorescence of CDs can be repeated many times by the addition of S 2− . Moreover, the CDs are used for biological imaging of living cells with well cell penetrability and low toxicity. Furthermore, it is successfully applied for anti-counterfeiting and information encryption. More interestingly, it can be doped with hydrogel and filter paper to prepare solid-phase sensors exhibiting high sensitivity and fast response, demonstrating their tremendous potential for the simple, rapid, and low-cost monitoring of Fe 3+ and S 2− . Graphical abstract
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-021-03709-6