| CdS纳米晶的稳定化处理及介质极性对荧光光谱的影响 |
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| 引用本文： | 许荣辉,汪勇先,贾广强,徐万帮,尹端沚. CdS纳米晶的稳定化处理及介质极性对荧光光谱的影响[J]. 人工晶体学报, 2006, 35(6): 1341-1345 |
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| 作者姓名： | 许荣辉 汪勇先 贾广强 徐万帮 尹端沚 |
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| 作者单位： | 中国科学院上海应用物理研究所放药中心,上海,201800;中国科学院研究生院,北京100039;中国科学院上海应用物理研究所放药中心,上海,201800;上海大学仪器分析与研究中心,上海,200444 |
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| 基金项目： | 国家自然科学基金(No.10405034)，中国科学院知识创新工程(No.JCXI-SW-08)，上海应用物理研究所学科导向项目(No.90200426) |
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| 摘 要： | 用硫脲、聚乙烯吡咯烷酮、L-半胱氨酸水溶液对水热法合成的硫化镉纳米晶进行稳定化处理,发现L-半胱氨酸和聚乙烯吡咯烷酮(PVP)能有效地稳定硫化镉纳米晶,荧光发射强度比处理前增强了五十倍以上.以氯仿、氧化三(正)辛基膦(TOPO)氯仿溶液以及3-巯基丙酸为萃取(或处理)剂,对水热法合成的水溶性CdS半导体纳米晶进行处理,经过荧光光谱分析,发现介质水、氯仿、氧化三(正)辛基膦(TOPO)氯仿溶液以及3-巯基丙酸会对CdS纳米晶的最大荧光激发峰与发射峰的位置产生不同影响,极性大的水分子使得荧光峰蓝移,极性小的氯仿、氧化三(正)辛基膦(TOPO)氯仿溶液以及3-巯基丙酸使得荧光峰红移,最大位移为31nm左右.
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| 关 键 词： | CdS纳米晶 荧光增强 稳定化处理 介质极性 蓝移 |
| 文章编号： | 1000-985X（2006）06-1341-05 |
| 收稿时间： | 2006-06-12 |
| 修稿时间： | 2006-06-12 |
Stabilization of CdS Nanocrystals and Influence of Solvent Polarization on Fluorescent Excitation/Emission Wavelength |
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| XU Rong-hui,WANG Yong-xian,JIA Guang-qiang,XU Wan-bang,YIN Duan-zhi. Stabilization of CdS Nanocrystals and Influence of Solvent Polarization on Fluorescent Excitation/Emission Wavelength[J]. Journal of Synthetic Crystals, 2006, 35(6): 1341-1345 |
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| Authors: | XU Rong-hui WANG Yong-xian JIA Guang-qiang XU Wan-bang YIN Duan-zhi |
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| Affiliation: | 1 Radiopharmaceutical Centre, Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800, China; 2 Graduate School of the Chinese Academy of Sciences,Beijing 100039, China; 3 Instrumental Analysis and Research Centre.,Shanghai University, Shanghai 200444,China |
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| Abstract: | High-quality CdS semiconductor nanocrystallites of wurtzite structure synthesized via hydrothermal method were characterized by a combination of transmission electron microscopy(TEM),high resolution transmission electron microscopy(HRTEM),X-ray powder diffraction(XRD) pattern.The fluorescence intensity emitted by the nanocrystals is surprisingly enhanced after being treated using thiourea, polyvinylpyrrolidone and L-cysteine respectively.Fluorescence spectra indicated that intensity of fluorescence increases more than fifty times after stabilization treatment by polyvinylpyrrolidone and L-cysteine.Fluorescence excitation and emission wavelengths were found to change when the water-soluble CdS nanocrystallites were treated with solvents or extractants with different polarization such as chloroform,trioctylphosphine oxide in chloroform solution and 3-mercaptopropionic acid respectively.The maximal shift of wavelength is about 31nm in 3-mercaptopropionic acid. |
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| Keywords: | cadmium sulfide nanocrystals photoluminescence enhancement stabilization treatment polarization blue shift |
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