以氧化镉为镉源、硫单质为硫源、油酸为配体、在十八烯体系中合成单分散的CdS纳米颗粒,研究了配体浓度对纳米微粒的生长动力学、颗粒尺寸分布的影响.采用乙基黄原酸锌作为Zn、S源的反应前体,采用逐滴滴加的方法制备了具有核壳结构的CdS/ZnS量子点,吸收光谱和荧光光谱表明CdS/ZnS纳米粒子比单一的CdS纳米粒子具有更优异的发光特性.透射电子显微镜、X射线粉末衍射、X射线光电子能谱、选区电子衍射证明ZnS在CdS表面进行了有效包覆.所制备核壳结构纳米粒子具有较好的尺寸分布,荧光发射峰半高峰宽为18~20nm,荧光量子产率达40%.
参考文献
[1] | Wang Y;Tang Z Y;Nicholas A K .[J].Materials Today,2005,8(05):20-31. |
[2] | Alivisatos P .The use of nanocrystals in biological detection[J].Nature biotechnology,2004(1):47-52. |
[3] | Park J;Joo J;Kwon S G et al.[J].Angewandte Chemie International Edition,2007,46(25):4630-4660. |
[4] | Z.Adam Peng;Xiaogang Peng .Formation of High-Quality CdTe, CdSe, and CdS Nanocrystals Using CdO as Precursor[J].Journal of the American Chemical Society,2001(1):183-184. |
[5] | Jesse M. Klostranec;Warren C. W. Chan .Quantum Dots in Biological and Biomedical Research: Recent Progress and Present Challenges[J].Advanced Materials,2006(15):1953-1964. |
[6] | Derfus A M;Chan W C;Bhatia S N .[J].Nano Letters,2004,4(01):11-18. |
[7] | Yu W W;Peng X .[J].Angewandte Chemie International Edition,2002,41(13):2368-2371. |
[8] | Georgi G;Yordanov a;Adachib E et al.[J].Materials Characterization,2007,58(03):267-270. |
[9] | Liao S S;Xu G F;Wang W et al.[J].ACTA BIOMATERIALIA,2007,3(05):669-675. |
[10] | Wang CL;Zhang H;Zhang JH;Li MJ;Han K;Yang B .The influence of oxygen on the fluorescence enhancement of fatty-acid-capped CdS nanocrystals[J].Journal of Colloid and Interface Science,2006(1):104-108. |
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