荧光
量子产额
量子点
离子
离子强度
检出限
碳纤维
水溶液
材料科学
分析化学(期刊)
热稳定性
热液循环
光化学
化学
纳米技术
化学工程
复合材料
色谱法
有机化学
光学
工程类
物理
复合数
作者
Xiaobiao Cui,Yinglin Wang,Jie Liu,Qiuyue Yang,Bo Zhang,Yuan Gao,Yue Wang,Geyu Lu
标识
DOI:10.1016/j.snb.2016.09.032
摘要
In this paper, we synthesized a new kind of dual functional nitrogen- and sulfur-co-doped carbon dots(C-dots) which could be applied as the fluorescent temperature sensor and the probe of trace amounts of Fe3+ ions via an one-pot facile hydrothermal approach from acrylic acid and methionine. The obtained C-dots with the average diameter of 2.3 nm manifested colorful fluorescence, good-solubility and attractive optical stability. The fluorescence lifetime is 7.92 ns. Although the quantum yield is 10.55%, the fluorescence can be fleetly and selectively quenched by Fe3+ ions. The detection limit was as low as 1.72 nM. In addition, high ionic strength, mild acids and alkaline only own a small impact on the fluorescence intensity of the C-dots. Furthermore, the C-dots could be deemed as a temperature sensor with significant reversibility, sensitivity and linearity. Meanwhile, the C-dots also possessed great recoverable and thermal stable fluorescence as expected.
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