高等学校化学学报

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (9): 1881.

• 研究论文 • 上一篇    下一篇

基于表面修饰聚丙烯酸合成超顺磁/荧光纳米复合粒子

莫志宏1,2, 饶通德1,3, 杨小超1   

  1. 1. 重庆大学化学化工学院,
    2. 微系统研究中心, 重庆 400044;
    3. 重庆三峡学院化学与环境工程学院, 万州 404000
  • 收稿日期:2008-12-31 出版日期:2009-09-10 发布日期:2009-09-10
  • 通讯作者: 莫志宏, 男, 博士, 教授, 博士生导师, 主要从事生物纳米技术等研究. E-mail: mozhh6511@163.com
  • 基金资助:

    科技部国际科技合作项目(批准号: 2007DFC00040)资助.

Synthesis of Superparamagnetic/Fluorescent Nanocomposites Based on Surface Modification by Polyacrylic Acid

MO Zhi-Hong1,2*, RAO Tong-De1,3, YANG Xiao-Chao1   

  1. 1. College of Chemistry and Chemical Engineering,
    2. Microsystem Research Centre, Chongqing University, Chongqing 400044, China;
    3. School of Chemistry and Environmental Engineering, Chongqing Three Gorges Institute, Chongqing 404000, China
  • Received:2008-12-31 Online:2009-09-10 Published:2009-09-10
  • Contact: MO Zhi-Hong. E-mail: mozhh6511@163.com
  • Supported by:

    科技部国际科技合作项目(批准号: 2007DFC00040)资助.

PDF (PC)

被引次数

19

摘要：

在聚丙烯酸修饰的Fe3O4纳米粒子表面共价结合罗丹明B, 获得分散性和荧光信号均得到改善的超顺磁/荧光复合纳米材料. 分别用透射电子显微镜(TEM)、傅里叶变换红外光谱仪(FTIR)、热重分析仪、荧光光谱仪、X射线衍射仪(XRD) 和振动样品磁强计(VSM) 对合成的粒子进行了表征. 结果表明, 羧基化的Fe3O4纳米粒子和Fe3O4-荧光纳米复合材料的粒径基本相同, 为6～10 nm. Fe3O4-荧光纳米复合材料的饱和磁化强度为39.2 A•m2/kg, 室温下呈现超顺磁性, 具有较强的荧光信号.

关键词: 超顺磁性; 聚丙烯酸表面修饰; 共价结合法; 荧光; 纳米复合粒子

Abstract:

Superparamagnetic/fluorescent nanocomposites were synthesized based on surface modification by polyacrylic acid, in order to improve the dispersity and fluorescence of the nanocomposites. The obtained nanocomposites were characterized via TEM, FTIR, TGA, XRD, VSM and fluorospectroscopy. The results show that the carboxylated Fe3O4 nanoparticles and Fe3O4-fluorescent bifunctional nanocomposites have a typical diameter of 6—10 nm. The Fe3O4-fluorescent bifunctional nanocomposites have a saturated magnetization of 39.2 A?m2/kg at room temperature and high fluorescent signal. The new magneto-fluorescent nanoagent has great potential applications for biological and medical uses.

Key words: Superparamagnetic; Surface modification by polyacrylic acid; Covalent combination; Fluorescence; Nanocomposite

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