Synthesis and magnetic properties of PEG-modified Fe3O4 nanospheres

摘要

Fe3O4 nanospheres with diameters of 150-300nm have been prepared by a simple solution method. By changing the experimental conditions, the structure-directing function of PEG, characterized by (high-resolution) transmission electron microscopy ((HR)TEM) and Fourier transform infrared (FT-IR) spectra, makes the resultant Fe3O4 nanosphere an excellent agent for biomedical applications. The saturation magnetization (M3) value of the sample can also be affected by changing the concentration of PEG.