| 微乳液法制备二氧化硅包覆ZnS:Mn/CdS纳米晶 |
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| 引用本文： | 姚渊,李冬梅,桑文斌,晏刚. 微乳液法制备二氧化硅包覆ZnS:Mn/CdS纳米晶[J]. 人工晶体学报, 2006, 35(2): 400-403 |
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| 作者姓名： | 姚渊 李冬梅 桑文斌 晏刚 |
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| 作者单位： | 上海大学材料学院电子信息材料系,上海,200072;上海大学材料学院电子信息材料系,上海,200072;上海大学材料学院电子信息材料系,上海,200072;上海大学材料学院电子信息材料系,上海,200072 |
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| 基金项目： | 教育部高等学校优秀青年教师教学科研奖励计划资助项目，上海市重点学科(T0101)资助 |
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| 摘 要： | 采用微乳液法制备核壳结构ZnS:Mn/CdS(～4.5nm)纳米晶,为获得水溶性纳米晶,继续向此微乳液添加硅酸乙酯(TEOS),并使用氨水作为催化剂,通过TEOS水解缩聚反应,在ZnS:Mn/CdS粒子表面生长连续的二氧化硅壳层.采用透射电子显微镜(TEM)、X射线衍射(XRD)、红外光谱(IR)、光致发光谱(PL)对其表面形貌、结构和光学特性进行表征.ZnS:Mn /CdS纳米粒子表面被二氧化硅壳层完全包覆,粒径大小约为10nm左右,粒子均匀性好.由于二氧化硅相无定形且透光性良好,二氧化硅包覆ZnS:Mn/CdS纳米晶的光学特性与未包覆的ZnS:Mn/CdS极其相似.
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| 关 键 词： | 微乳液 纳米微粒 ZnS:Mn/CdS 二氧化硅壳层 光致发光 |
| 文章编号： | 1000-985X（2006）02-0400-04 |
| 收稿时间： | 2005-10-31 |
| 修稿时间： | 2005-10-31 |
Synthesis of Silica-overcoated ZnS:Mn/CdS Nanoparticles by Microemulsion Technique |
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| YAO Yuan,LI Dong-mei,SANG Wen-bin,YAN Gang. Synthesis of Silica-overcoated ZnS:Mn/CdS Nanoparticles by Microemulsion Technique[J]. Journal of Synthetic Crystals, 2006, 35(2): 400-403 |
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| Authors: | YAO Yuan LI Dong-mei SANG Wen-bin YAN Gang |
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| Affiliation: | School of Material Science and Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | ZnS:Mn/CdS core/shell nanoparticles(~4.5nm) were pre-synthesized by microemulsion technique.To prepare water-soluble nanoparticles,tetraethyl orthosilicate(TEOS) was directly added into the same reverse micellar system to grow a consecutive silica shell on ZnS:Mn/CdS nanoparticles surface,using ammonium hydroxide(NH_4OH) as catalyst.X-ray diffraction(XRD),infrared spectrum(IR),transmission electron microscope(TEM),Photoluminescence(PL) spectrum measurements were performed for the sample characterization.The silica-overcoated particles can grow to about 10nm with a good uniformity in size.Because silica is amorphous and optically transparent,the optical properties of silica-overcoated ZnS:Mn/CdS nanoparticles are found similar to those of uncoated ZnS:Mn/CdS nanoparticles. |
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| Keywords: | microemulsion nanoparticles ZnS:Mn/CdS silica shell photoluminescence |
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