Synthesis and Coating of Fluorescent Carbon Dots via Micro-Emulsion Method
Abstract: Fluorescent carbon dots (CA-FCDs) were prepared from citric acid and urea via micro-emulsion method. The results showed that the CA-FCDs were amorphous and the particle size was 9.0 nm. There were multiple excitation peaks (between 200 - 400 nm) for the CA-FCDs and the position of the emission peak was located at 440 nm that the carbon dots have remarkable fluorescence properties. The CA-FCDs were of excellent fluorescence stability from the fact that the self absorption and concentration effects of the CA-FCDs were small in the concentration range of 0.01 - 0.12 mg/ml. The CA-FCDs were suitable for working under neutral and alkaline conditions (pH > 6). Also, the CA-FCDs had a strong fluorescent durability that half- life was as long as 1250 min when the concentration was 0.12 mg/ml. In addition, the CA-FCDs were coated by polystyrene via in-situ polymerization, and the nano-composite microspheres with core-shell structure were obtained successfully and the particle size was about 210 nm. Then, the UV absorption peak of the coated CA-FCDs had been changed.
文章引用: 毕森林 , 郑楠楠 , 孙 来 , 周兴平 (2017) 荧光碳点的微乳液法合成及包覆。 物理化学进展， 6， 45-51. doi: 10.12677/JAPC.2017.62006
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