Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (9): 1881.

• Articles • Previous Articles     Next Articles

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.

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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