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- Title
A Continuously Tunable Full-Color Emission Nitrogen-Doped Carbon Dots and for Ultrasensitive and Highly Selective Detection of Ascorbic Acid.
- Authors
Huang, Demin; Qi, Haiyan; Jing, Jing; Sami, Rokayya; Jing, Tao; Alsufyani, Sultan J.; Benajiba, Nada; Madkhali, Nawal
- Abstract
Nitrogen-doped carbon dots exhibiting excitation-dependent full-color emissions (F-NCDs) were prepared via the one-step hydrothermal method with citric acid and phenylenediamine. Specifically, the emission wavelength of the F-NCDs tuned from 452 nm to 602 nm due to the introduction of new energy levels by C=O and C=N functional groups. We exploited its stability in illumination, ionic strength, and pH, as well as its specificity, sensitivity, especially in ascorbic acid (AA) detection. F-NCDs could measure the AA concentration in the linear ranges of 0~0.1 and 0.1~1 mmol/L with the detection limit (LOD, S/N = 3) as low as 2.6 nmol/L. Additionally, we successfully detected AA in bovine serum with our F-NCDs and obtained the result within 1 min. Because of full-color emission features, we believe our F-NCDs have a great potential in fluorescent sensor detection.
- Publication
Nanomaterials (2079-4991), 2022, Vol 12, Issue 7, p693
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano12040693