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《Journal of Huazhong Normal University(Natural Sciences)》 2012-05
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Synthesis of monodispersed ZnO microspheres and characterizations

YAN Wei,AN Ming,WANG Xiang,DONG Qiqi,SUN Lining,SHI Liyi,DENG Wei(Nano Science and Technology Research Center,Shanghai University,Shanghai 200444)  
In this paper,monodispersed ZnO microspheres in sizes from 50 to 200 nm were synthesized with a developed two-step method.In the primary reaction,ethanol suspension of ZnO nanoparticles was prepared,and monodispersed ZnO microspheres were synthesized in the secondary reaction by adding the ZnO nanoparticles suspension into the reaction solution.Diameter of the ZnO microspheres could be controlled by varying the volume of QDs suspension added.The transmission microscopy images and X-ray diffraction patterns of the ZnO microspheres showed that no matter their diameters,the ZnO microspheres were formed by aggregation of well crystallized ZnO nanoparticles.The polydispersity indexes(PDI) of ZnO microspheres were detected.It is found that PDI values of the microspheres were all less than 1.0,suggesting the monodispersity of the ZnO microspheres.The PDI value was only 0.16 when the diameter of the ZnO microspheres was 150 nm.
【Fund】: 国家自然科学基金项目(20805030 21001072);; 上海市教委重点学科基金项目(J50102);; 上海市重点学科项目(S30107);; 上海东方学者项目
【CateGory Index】: TB383.1;O614.241
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