高等学校化学学报

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CdTe纳米晶-BaSO4复合荧光微球的制备

刘轶, 张皓, 王春雷, 杨柏   

  1. 吉林大学超分子结构与材料国家重点实验室, 长春 130012
  • 收稿日期:2008-09-11 修回日期:1900-01-01 出版日期:2008-12-10 发布日期:2008-12-10
  • 通讯作者: 杨柏

Preparation of Luminescent CdTe Nanocrystal-BaSO4 Composite Microspheres

LIU Yi, ZHANG Hao, WANG Chun-Lei, YANG Bai*   

  1. State Key Laboratory of Supramolecular Structure and Materials, Jilin Univeristy, Changchun 130012, China
  • Received:2008-09-11 Revised:1900-01-01 Online:2008-12-10 Published:2008-12-10
  • Contact: YANG Bai

摘要: 利用表面活性剂双层修饰技术在水溶性荧光CdTe纳米晶表面先后包覆了双十八烷基二甲基溴化铵和十二烷基硫酸钠, 从而在纳米晶外表面引入—SO-4反应位点, 以—SO-4为活性中心进一步制备了包覆CdTe纳米晶的BaSO4复合荧光微球. 通过扫描电子显微镜、透射电子显微镜、共聚焦荧光显微镜和X射线粉末衍射等方法确定了复合微球的尺寸及组成. 由于BaSO4的保护, CdTe-BaSO4复合微球荧光的耐酸性比CdTe原液的提高明显.

关键词: 纳米晶, 表面修饰, 硫酸钡, 复合微球

Abstract: On the basis of the technique of surfactant bilayer modification, aqueous luminescent CdTe nanocrystals(NCs) were modified with DODAB layer and SDS layer. Due to the introduction of SO-4 sites on NC surface from SDS layer, NCs were further incorporated into BaSO4 composite microspheres through the stepwise addition of Ba2+ and SO2-4. The size and the composition of microspheres were characterized via SEM, TEM, confocal fluorescence microscope and XRD. Owning to the protection of BaSO4, the photoluminescence of as-prepared BaSO4-CdTe microspheres were more antacid than the original aqueous CdTe NCs.

Key words: Nanocrystal, Surface modification, Barium sulfate, Composite sphere

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