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YANG Yi, SHEN Dezhen, YU Guangyou, ZHANG Jiying, YANG Baojun, FAN Xiwu (Changchun Institute of Physics, Chinese Academy of Sciences, Changchun 130021, China) (Laboratory of Excited State Processes, Chinese Academy of Sciences, Changchun 130021, Chi  
It is reported in this paper that CdS nanopatricle was synthesized in microemulsion, and the surface of CdS nanoparticle was decorated by depositing a layer of ZnS, then formed CdS/ZnS coated structrue nanoparticle. The size and the coated structure was characterized by absorption spectra and TEM.The diameter of CdS core is 5nm. The total diameter of CdS/ZnS coated structure is 8~10nm. The blue shift of λ threshold and PL peak is caused by quantum size effect. The coating of ZnS can reduce the emission of surface traps of CdS nanoparticle and enhance the emission of band edge and lead it blue shift more.
【Fund】: 国家自然科学基金
【CateGory Index】: TB383
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