Synthesis and characterization of biocompatible Fe3O4 nanoparticles
Tóm tắt
In this study, magnetite (Fe3O4) nanoparticles with a size range of 8–20 nm were prepared by the modified controlled chemical coprecipitation method from the solution of ferrous/ferric mixed salt‐solution in alkaline medium. In the process, two kinds of surfactant (sodium oleate and polyethylene glycol) were studied; then, sodium oleate was chosen as the apt surfactant to attain ultrafine, nearly spherical and well‐dispersed (water‐base) Fe3O4 nanoparticles, which had well magnetic properties. The size and size distribution of nanoparticles were determined by particle size analyzer. And the magnetite nanoparticles was characterized by X‐ray powder diffraction (XRD) analysis, transmission electron microscopy (TEM), electron diffraction (ED) photography, Fourier transform infrared spectrometer (FT‐IR), and vibrating‐sample magnetometer (VSM). Also the effect of many parameters on the Fe3O4 nanoparticles was studied, such as reaction temperature, pH of the solution, stirring rate and concentration of sodium oleate. And the 5‐dimethylthiazol‐2‐yl‐2,5‐ diphenyltetrazolium bromide (MTT) assay was performed to evaluate the biocompatibility of magnetite nanoparticles. The results showed that the Fe3O4 nanoparticles coated by sodium oleate had a better biocompatibility, better magnetic properties, easier washing, lower cost, and better dispersion than the magnetite nanoparticles coated by PEG. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2007
Từ khóa
Tài liệu tham khảo
Häfeli U, 1997, Scientific and Clinical Applications of Magnetic Microspheres, 10.1007/978-1-4757-6482-6
Cornell RM, 1991, Iron Oxides in the Laboratory: Preparation and Characterization
Cornell RM, 1996, The Iron Oxide: Structure, Properties, Reactions, Occurrence and Uses