物理化学学报 >> 2010, Vol. 26 >> Issue (03): 784-788.doi: 10.3866/PKU.WHXB20100246

材料物理化学 上一篇    下一篇

氧化铁磁性纳米粒子的表面配体交换及相转移

刘波洁, 李学毅, 陈威, 刘忍肖, 葛广路   

  1. 四川师范大学生命科学学院, 成都 610101; 国家纳米科学中心, 北京 100190
  • 收稿日期:2009-09-23 修回日期:2009-11-13 发布日期:2010-03-03
  • 通讯作者: 葛广路 E-mail:gegl@nanoctr.cn

Surface Ligand Exchange and Phase Transfer of Iron Oxide Magnetic Nanoparticles

LIU Bo-Jie, LI Xue-Yi, CHEN Wei, LIU Ren-Xiao, GE Guang-Lu   

  1. College of Life Science, Sichuan Normal University, Chengdu 610101, P. R. China; National Center for Nanoscience and Technology, Beijing 100190, P. R. China
  • Received:2009-09-23 Revised:2009-11-13 Published:2010-03-03
  • Contact: GE Guang-Lu E-mail:gegl@nanoctr.cn

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摘要：

以苯甲醇为单一溶剂, 通过常压、高温热解乙酰丙酮铁, 制备了尺寸单分散的四氧化三铁磁性纳米粒子. 采用透射电镜(TEM), X射线衍射(XRD), 动态光散射(DLS)等方法对粒子形貌和结构进行了表征. 利用傅里叶变换红外(FT-IR)光谱和热重分析(TGA)研究了所制备纳米粒子的表面化学, 结果表明稳定四氧化三铁粒子的是苯甲酸分子, 且表面覆盖度小于20%. 所制备的磁性纳米粒子可以在室温下方便地进行表面配体交换, 从而为氧化铁磁性纳米粒子的功能化提供新的途径.

关键词: 氧化铁, 磁性纳米粒子, 苯甲醇, 高温热解

Abstract:

Iron oxide magnetic nanoparticles with a narrow size distribution were prepared by thermal decomposition of iron (III) acetylacetonate using benzyl alcohol as the only solvent. The structure and morphology of the as-prepared nanoparticles were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and dynamic light scattering (DLS). Fourier transforminfrared (FT-IR) spectroscopy and thermal gravimetric analysis (TGA) were used to study the surface chemistry of the particles, and it was found that the nanoparticles were stabilized by benzoic acid molecules with less than 20% monolayer coverage. At room temperature, the surface ligands can easily exchange for other molecules. This method will facilitate the functionalization and application of iron oxide magnetic nanoparticles.

Key words: Iron oxide, Magnetic nanoparticle, Benzy alcohol, Thermal decomposition