| 利用离子型Cd源制备ZnSe/CdSe核-壳结构纳米晶 |
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| 引用本文： | 王洪哲,赵慧玲,申怀彬,牛金钟,杜祖亮,李林松.利用离子型Cd源制备ZnSe/CdSe核-壳结构纳米晶[J].中国科学:化学,2010(11):1592-1597. |
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| 作者姓名： | 王洪哲 赵慧玲 申怀彬 牛金钟 杜祖亮 李林松 |
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| 作者单位： | 特种功能材料教育部重点实验室；河南大学,开封475004 |
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| 基金项目： | 河南省创新型科技人才队伍建设工程（084200510013）; 教育部留学回国人员科研启动基金（2008-890）资助 致谢该工作得到河南省创新型科技人才队伍建设工程（084200510013）和教育部留学回国人员科研启动基金（2008-890）资助,特此致谢 |
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| 摘 要： | 在有机相体系中利用ZnSe前驱体纳米晶制备过程中的富Se环境,以引入Cd2+的方式在相对温和的环境下通过控制Cd2+离子的加入量及调节反应时间,成功制备了ZnSe/CdSe核-壳复合结构纳米晶.利用X射线衍射(XRD)、透射电镜(TEM)、紫外-可见吸收光谱(UV-vis)和荧光光谱(FL)对其结构形貌以及光学性质进行表征和分析的结果表明,CdSe以外延生长的方式包覆在ZnSe纳米晶表面从而形成具有良好结晶性的核-壳复合结构,其荧光发射始终保持良好单色性,同时实现了在500～620nm可见光范围内的连续可调.
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| 关 键 词： | ZnSe/CdSe 纳米晶 核-壳结构 |
Synthesis of ZnSe/CdSe core/shell nanocrystals using Cd ions as cadmium source |
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| WANG HongZhe,ZHAO HuiLing,SHEN HuaiBin,NIU JinZhong,DU ZULiang ＆ LI LinSong.Synthesis of ZnSe/CdSe core/shell nanocrystals using Cd ions as cadmium source[J].Scientia Sinica Chimica,2010(11):1592-1597. |
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| Authors: | WANG HongZhe ZHAO HuiLing SHEN HuaiBin NIU JinZhong DU ZULiang ＆ LI LinSong |
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| Institution: | Key Laboratory for Special Functional Materials,Ministry of Education;Henan University,Kaifeng 475004,China |
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| Abstract: | Using pre-synthesized ZnSe nanocrystals as cores,ZnSe/CdSe core-shell nanocrystals were successfully synthesized under Se-rich environment by controllable introduction of Cd2＋ions and adjustment of reaction time. The crystal structures,shapes,and optical properties of as-synthesized nanocrystals were characterized by X-ray diffraction,transmission electron microscopy,UV-vis absorption and photoluminescence spectroscopies.The results showed that the epitaxial growth of CdSe shell onto ZnSe nanocrystals led to the formation of ZnSe/CdSe core-shell structures.ZnSe/CdSe core-shell nanocrystals were well-crystallized and the PL emission can be tuned consecutively from 500 to 620 nm by tuning the addition mount of Cd2＋ions and total reaction time. |
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| Keywords: | ZnSe/CdSe nanocrystal core-shell structure |
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