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Highly photoluminescent and temperature-sensitive P, N, B-co-doped carbon quantum dots and their highly sensitive recognition for curcumin
- Wu, Bin, Liu, Xiaolong, Shi, Xiaofeng, Han, Wei, Wang, Chunru, Jiang, Li
- RSC advances 2019 v.9 no.15 pp. 8340-8349
- carbon quantum dots, curcumin, detection limit, fluorescence, hot water treatment, photoluminescence, temperature, thermosensitivity, water solubility
- Water-soluble P, N, B-co-doped carbon quantum dots (PNBCDs) synthesized using a convenient hydrothermal method exhibit many excellent features, such as strong fluorescence, excitation-independent emission, high monodispersity, good stability, and excellent water solubility with a fluorescence quantum yield of 21.95%. The as-prepared PNBCDs possessed remarkable selectivity and sensitivity towards curcumin with the linear range of 0–1.5 μmol L⁻¹ and the detection limit for curcumin was 68 nmol L⁻¹ (3σ/k). Additionally, the wonderfully reversible and repeatable sensitivity to external temperature makes it possible that the PNBCDs could be used as a biocompatible fluorescent ink and for thermo-sensitive devices.