| 反相微乳液法制备CdTe@SiO2荧光微球及其荧光性能研究 |
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| 引用本文： | 宁振动,张纪梅,魏君,成耀宇. 反相微乳液法制备CdTe@SiO2荧光微球及其荧光性能研究[J]. 天津工业大学学报, 2012, 31(1): 49-52 |
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| 作者姓名： | 宁振动 张纪梅 魏君 成耀宇 |
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| 作者单位： | 1. 天津工业大学环境与化学工程学院,天津,300160
2. 天津工业大学理学院,天津,300160 |
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| 基金项目： | 天津自然科学基金资助项目(09JCYBJC15700) |
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| 摘 要： | 利用巯基丙酸(MPA)为稳定剂,水相合成高质量的CdTe纳米晶,然后通过反相微乳液方法制备得到了具有明显核壳结构并单分散的CdTe@SiO2荧光复合纳米粒子;利用透射电子显微镜(TEM)、荧光分光光度计以及紫外可见光分光光度计对制备的纳米粒子进行表征;研究了未包裹的CdTe量子点与核壳型CdTe@SiO2纳米复合粒子分别对pH及离子强度的耐受性.研究发现:由于SiO2壳层的存在使得CdTe@SiO2能够在很高的离子强度及很广泛的pH范围下仍具有较强的荧光.由于这些优点,使其在生物标记、细胞成像等生物领域具有广泛应用.
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| 关 键 词： | 反相微乳液 CdTe@SiO2荧光微球 荧光性能 核壳型 离子强度 pH |
CdTe@SiO2 particles prepared via reverse microemulsion method and its fluorescence properties |
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| NING Zhen-dong , ZHANG Ji-mei , WEI Jun , CHENG Yao-yu. CdTe@SiO2 particles prepared via reverse microemulsion method and its fluorescence properties[J]. Journal of Tianjin Polytechnic University, 2012, 31(1): 49-52 |
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| Authors: | NING Zhen-dong ZHANG Ji-mei WEI Jun CHENG Yao-yu |
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| Affiliation: | 1.School of Environmental and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;2.School of Science,Tianjin Polytechnic University,Tianjin 300387,China) |
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| Abstract: | High-quality CdTe nanocrystals capped by mercaptopropionic acid(MPA) were prepared in aqueous solution,then fluorescent,monodispersed,well-separated,core/shell CdTe@SiO2 particles were prepared via reverse microemulsion method.Obtained samples were characterized by means of transmission electron microscope(TEM),UV-vis and PL emission.The influences of ionic strength and pH on the PL emission of uncoated CdTe and CdTe/SiO2 composite nanoparticles were investigated thoroughly.The results show that due to the presence of SiO2 shell,CdTe@ SiO2 still remain a strong fluorescence at high ionic strength and a very broad pH range.Because of these advantages,it has broad applications in biological fields,such as biomarkers,cell imaging. |
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| Keywords: | reverse microemulsion CdTe@SiO2 particles fluorescence properties core-shell ionic strength pH |
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