| 高质量CdSe量子点的水相制备与表征 |
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| 引用本文： | 王益林,杨昆,潘华桥,刘声燕,许献美,周立亚. 高质量CdSe量子点的水相制备与表征[J]. 高等学校化学学报, 2012, 33(12): 2604-2608. DOI: 10.7503/cjcu20120751 |
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| 作者姓名： | 王益林 杨昆 潘华桥 刘声燕 许献美 周立亚 |
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| 作者单位： | 广西大学化学化工学院, 南宁 530004 |
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| 基金项目： | 国家自然科学基金(批准号: 61066006, 61264003)和广西大学科研基金(批准号: XBZ110359)资助. |
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| 摘 要： | 以巯基丁二酸为稳定剂, 亚硒酸钠为硒源, 制备了高质量水溶性CdSe量子点. 研究了反应时间、 镉与硒的摩尔比及镉与巯基丁二酸的摩尔比等实验条件对CdSe量子点光谱性能的影响. 分别用紫外-可见光谱、 荧光光谱、 X射线粉末衍射和透射电子显微镜等对量子点进行表征. 结果表明, 采用这种方法制得的CdSe量子点为立方晶型, 量子点的荧光发射峰在518～562 nm范围内连续可调, 并且发射峰的半峰宽始终保持在35 nm左右, 荧光量子产率可达21%.
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| 关 键 词： | 半导体纳米晶 光学性质 CdSe量子点 |
| 收稿时间： | 2012-08-15 |
Preparation and Characterization of High Quality CdSe Quantum Dots in Aqueous Solution |
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| WANG Yi-Lin,YANG Kun,PAN Hua-Qiao,LIU Sheng-Yan,XU Xian-Mei,ZHOU Li-Ya. Preparation and Characterization of High Quality CdSe Quantum Dots in Aqueous Solution[J]. Chemical Research In Chinese Universities, 2012, 33(12): 2604-2608. DOI: 10.7503/cjcu20120751 |
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| Authors: | WANG Yi-Lin YANG Kun PAN Hua-Qiao LIU Sheng-Yan XU Xian-Mei ZHOU Li-Ya |
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| Affiliation: | School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China |
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| Abstract: | Using sodium selenite as selenium source and mercaptosuccinic acid(MSA) as stabilizer, high quality CdSe quantum dots(QDs) were conveniently prepared in aqueous solution. The influence of experimental conditions, including refluxing time, cadmium to selenium molar ratio and cadmium to MSA molar ratio, on the luminescent properties of the obtained CdSe QDs were systematically investigated. The obtained QDs were characterized by UV-Vis absorption spectrometry, photoluminescence(PL) spectrometry, X-ray powder diffraction(XRD) and transmission electron microscopy(TEM). The results show that the proposed method lead to the formation of cubic CdSe QDs with narrow fluorescence full width at half maximum(35 nm), high photoluminescence quantum yield(up to 21%), and a broad emission spectra tunable from 518 to 562 nm. |
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| Keywords: | Semicondutor nanocrystal Optical property CdSe quantum dots |
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