| CdS纳米晶的制备及其荧光研究 |
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| 引用本文： | 许荣辉,汪勇先,徐万帮,尹端沚.CdS纳米晶的制备及其荧光研究[J].人工晶体学报,2006,35(5):1007-1011. |
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| 作者姓名： | 许荣辉 汪勇先 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 |
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| 基金项目： | 国家自然科学基金(No.20501022)，中国科学院知识创新工程(No.JCXI-SW-08)资助项目 |
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| 摘 要： | 以醋酸镉、L-半胱氨酸为主要原料,采用水热法制备了尺寸小于10nm、具有强光致荧光的纤锌矿结构CdS半导体纳米晶.水热法可以将晶核形成与晶体生长阶段较好地分开,加之提供的高温熟化条件,可以得到粒度小而均匀、结构良好的纳米晶.用高分辨透射电镜(HRTEM)、XRD对产品的晶体大小、结构进行了详细地表征,分析了影响纳米晶尺寸的因素,用相关性较好的荧光激发与发射光谱研究了硫化镉纳米晶的光致荧光性能.制备的硫化镉(CdS)纳米晶结构良好、粒度均匀、荧光激发专一,最大激发波长在338nm,其发射荧光的波长位于419nm,发射强度大.
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| 关 键 词： | CdS纳米晶 水热法 荧光 量子点 |
| 文章编号： | 1000-985X（2006）05-1007-05 |
| 收稿时间： | 04 5 2006 12:00AM |
| 修稿时间： | 2006-04-052006-06-20 |
Study on Synthesis and Fluorescent Property of CdS Nanocrystals |
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| XU Rong-hui,WANG Yong-xian,XU Wan-bang,YIN Duan-zhi.Study on Synthesis and Fluorescent Property of CdS Nanocrystals[J].Journal of Synthetic Crystals,2006,35(5):1007-1011. |
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| Authors: | XU Rong-hui WANG Yong-xian XU Wan-bang YIN Duan-zhi |
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| Institution: | 1. Radiopharmaceutical Centre, Shanghai Institute of Applied Physics , Chinese Academy of Science, Shanghai 201800, China; 2. Graduate School of the Chinese Academy of Sciences,Beijing 100039, China |
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| Abstract: | The preparation of high-quality CdS semiconductor nanocrystallites of wurtzite structure is described.Crystallites about 10nm in diameter with consistent crystal structure and a high degree of monodispersity were synthesized using cadmium acetate dehydrates and L-cysteine as precursors via hydrothermal method,which separates nucleation stage from growth stage and favors forming of nanocrystals with perfect structure after Ostwald ripening process and sufficiently structural adjustment.High sample quality results showed in sharp fluorescence excitation at 338nm in wavelength and strong photoluminescence emission at 419nm in wavelength.The crystallite structure was characterized by a combination of transmission electron microscopy(TEM),high resolution transmission electron microscopy(HRTEM),X-ray powder diffraction(XRD) spectrum.Parameters influencing sizes and photoluminescence are discussed. |
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| Keywords: | CdS nanocrystallites hydrothermal method photoluminescence quantum dots |
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