Basina G, Mountrichas G, Devlin E, Boukos N, Niarchos D, Petridis D, Pispas S, Tzitzios V
Institute of Materials Science, N.C.S.R. "Demokritos" Agia Paraskevi, 15310 Athens, Greece.
J Nanosci Nanotechnol. 2009 Aug;9(8):4753-9. doi: 10.1166/jnn.2009.1275.
Fe3O4 nanoparticles coated with double hydrophilic biocompatible poly(sodium(2-sulfamate-3-carboxylate)isoprene)-b-poly(ethylene oxide) block copolymer were prepared by a one step precipitation method. The magnetic nanoparticles have 15 nm mean diameter (TEM), 68 nm hydrodynamic diameter, -30.10 mV zeta-potential and form very stable dispersion in aqueous media. Structural characterization using powder XRD and Mössbauer spectroscopy establish the magnetite phase, while thermogravimetric analysis and FT-IR spectroscopy confirm the presence of the block copolymer on the nanoparticles surface. The magnetic properties were determined using a vibrating sample magnetometer (VSM) at room temperature and reveal superparamagnetic behavior while the composite materials shows high saturation magnetization up to 67.7 emu/gr.
通过一步沉淀法制备了包覆双亲性生物相容性聚（2-氨基磺酸钠-3-羧基异戊二烯）-b-聚环氧乙烷嵌段共聚物的Fe3O4纳米颗粒。磁性纳米颗粒的平均直径为15nm（透射电子显微镜），流体动力学直径为68nm，ζ电位为-30.10mV，在水性介质中形成非常稳定的分散体。使用粉末X射线衍射和穆斯堡尔光谱进行的结构表征确定了磁铁矿相，而热重分析和傅里叶变换红外光谱证实了纳米颗粒表面存在嵌段共聚物。在室温下使用振动样品磁强计（VSM）测定磁性，结果显示出超顺磁性行为，而复合材料显示出高达67.7emu/gr的高饱和磁化强度。
