张桥, 陈燕清, 胡峰, 张明鑫. 巯基丙酸修饰的水溶性CdS/ZnS量子点的制备及荧光性能[J]. 南昌航空大学学报(自然科学版), 2014, 28(1): 60-63. DOI: 10.3969/j.issn.1001-4926.2014.01.011
引用本文: 张桥, 陈燕清, 胡峰, 张明鑫. 巯基丙酸修饰的水溶性CdS/ZnS量子点的制备及荧光性能[J]. 南昌航空大学学报(自然科学版), 2014, 28(1): 60-63. DOI: 10.3969/j.issn.1001-4926.2014.01.011
ZHANG Qiao, CHEN Yan-qing, HU Feng, ZHANG Ming-xin. Preparation and Fluorescence Characterization of Water-soluble CdS/ZnS Quantum Dots Modified with 3-Mercaptopropionic Acid[J]. Journal of nanchang hangkong university(Natural science edition), 2014, 28(1): 60-63. DOI: 10.3969/j.issn.1001-4926.2014.01.011
Citation: ZHANG Qiao, CHEN Yan-qing, HU Feng, ZHANG Ming-xin. Preparation and Fluorescence Characterization of Water-soluble CdS/ZnS Quantum Dots Modified with 3-Mercaptopropionic Acid[J]. Journal of nanchang hangkong university(Natural science edition), 2014, 28(1): 60-63. DOI: 10.3969/j.issn.1001-4926.2014.01.011

巯基丙酸修饰的水溶性CdS/ZnS量子点的制备及荧光性能

Preparation and Fluorescence Characterization of Water-soluble CdS/ZnS Quantum Dots Modified with 3-Mercaptopropionic Acid

  • 摘要: 以巯基丙酸为修饰剂合成了水溶性CdS量子点和核壳CdS/ZnS量子点。研究了溶液酸度、反应温度、反应时间对核壳CdS/ZnS量子点荧光性能的影响,并用红外光谱、X-射线衍射对量子点进行表征。实验结果表明:CdS/ZnS核壳结构量子点的荧光强度是CdS量子点的2.27倍,同时最大发射波长发生蓝移,从包覆前的562nm移动到540nm。

     

    Abstract: Water-soluble CdS and core/shell CdS/ZnS quantum dots(QDs) were prepared by using 3-mercaptopropionic acid as modifier. The effects of reaction time, pH, temperature on fluorescence emission spectra of CdS/ZnS QDs were discussed. The nanocrystals were characterized by X-ray powder diffraction (XRD) and FTIR. The results showed that the fluorescence intensity of core/shell CdS/ZnS QDs is 2.27 times that of CdS quantum dots, and the maximum emission wavelength had a blue shift, and changed from 562nm to 540nm.

     

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