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氨基化单分散量子点/二氧化硅核壳纳米粒子的制备及其细胞标记

张兵波1, 宫晓群1, 林婷婷2, 何彦津2, 成靖1, 单顺阳1, 常津1   

    1. 天津大学材料学院纳米生物技术研究所, 天津 300072;
    2. 天津医科大学眼科中心, 天津 300070
  • 收稿日期:2008-06-03 修回日期:1900-01-01 出版日期:2009-02-10 发布日期:2009-02-10
  • 通讯作者: 常津

Preparation and Cell-labeling Function of Monodisperse Core/Shell Structured Quantum Dots/SiO2 with Amino Groups

ZHANG Bing-Bo1, GONG Xiao-Qun1, LIN Ting-Ting2, HE Yan-Jin2, CHENG Jing1, SHAN Shun-Yang1, CHANG Jin1*   

    1. Institute of Nanobiotechnology, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China;
    2. Eye Center, Tianjin Medical University, Tianjin 300070, China
  • Received:2008-06-03 Revised:1900-01-01 Online:2009-02-10 Published:2009-02-10
  • Contact: CHANG Jin

摘要: 通过反向微乳液法, 在油溶性量子点表面包裹二氧化硅外壳, 使油溶性量子点水溶性化, 再利用3-氨丙基三乙氧基硅烷(APTES)在已形成的二氧化硅纳米颗粒表面进行氨基化改性, 制备富含氨基的二氧化硅包裹的量子点荧光纳米球. 通过透射电子显微镜(TEM)、粒径分析、zeta电位检测、紫外-可见分光光度、荧光分光光度和红外光谱等手段对产品进行了表征. 结果表明, 所制备的二氧化硅量子点纳米球(45 nm)具有单分散性、水溶性好及光化学稳定性强等优点. 通过静电作用, 所制备的单分散氨基化二氧化硅量子点对肿瘤细胞表面膜电荷进行了初步标记显像.

关键词: 量子点, 氨基, 二氧化硅, 细胞标记

Abstract: Water-soluble silica-coated quantum dots(QDs) were prepared by encapsulating hydrophobic QDs into silica via the reverse microemulsion method. The silica-coated QDs nanoparticles were further modified with 3-aminopropyltriethoxysilane(APTES). The as-prepared samples were characterized with transmission electron microscopy(TEM), particle size analyzer and zeta potential, UV-Vis absorption/Photoluminescence(PL) and Fourier transform infrared spectroscopy(FTIR) measurements. The results show that the silica-coated QDs are well defined with ca. 45 nm, monodisperse, water-soluble, highly-stable. And the as-obtained silica-coated QDs with amino groups can label the cancer cell via the electrostatic attraction.

Key words: Quantum dots, Amino group, SiO2, Cell-labeling

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