Screening of multifunctional fruit carbon dots for fluorescent labeling and sensing in living immune cells and zebrafishes

荧光 量子产额 水溶液中的金属离子 离子 碳纤维 化学 橙色(颜色) 光化学 量子点 激进的 产量(工程) 金属 检出限 分析化学(期刊) 材料科学 核化学 纳米技术 复合数 色谱法 有机化学 光学 物理 复合材料 冶金 食品科学
作者
Weisheng Zhu,Xiangfan Gao,Xiaokan Yu,Qisi Li,Yuan Zhou,H. Qiu,Bengang Xing,Zhijun Zhang
出处
期刊:Mikrochimica Acta [Springer Science+Business Media]
卷期号:189 (6) 被引量:6
标识
DOI:10.1007/s00604-022-05318-1
摘要

Nine kinds of carbon dots (CDs) were synthesized by using fruits with different varieties as carbon sources; meanwhile, the fluorescence characteristics, quantum yield, and response ability to different metal ions and free radicals were systematically studied. These CDs showed similar excitation and emission spectral ranges (λex ≈ 345 nm, λem ≈ 435 nm), but very different fluorescence quantum yield (QY), in which orange and cantaloupe CDs have the highest QY around 0.25 and green plum CDs showed the lowest quantum yield around 0.1. Interestingly, the fluorescence of all of these CDs can be significantly quenched by hydroxyl radical (•OH) and iron ion (Fe3+); however, these CDs showed very different response characteristics to other metal ions (e.g., Co2+, Ni2+, Cu2+, Ce3+, Mn2+, Ag+, and Fe2+). Through in-depth analysis, we found some interesting patterns of the influence of carbon sources on the fluorescence characteristics of CDs. Finally, by using white pitaya CDs as fluorescence probe, we realized sensing of Fe3+ and •OH with limits of detection (LOD) of 19.4 μM and 0.7 μM, respectively. Moreover, the CDs were also capable for sensitive detection in immune cells and even in zebrafishes. Our work can provide valuable guidance for the rational design of functional CDs for biological applications.Graphical abstract
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