Surface modification of Fe_3O_4 nanoparticles and their magnetic properties  

作　　者：Hao Yan Jian-cheng Zhang Chen-xia You Zhen-wei Song Ben-wei Yu Yue Shen 

机构地区：[1]School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2009年第2期226-229,共4页矿物冶金与材料学报（英文版）

基　　金：the National Natural Science Foundation of China (No.90206017);Systems Biology Research Foundation of Shanghai University, Innovation Program of Shanghai Municipal Education Commission (No.08YZ08);Shanghai City Committee of Science and Technology (No.08520741600, 0572nm016, 07JC14058)

摘　　要：Fe3O4 magnetic nanoparticles were synthesized by the hydrothermal method, and the influences of the surfactant sodium bis（2-ethylhexyl） sulfosuecinate （AOT） on the particles were investigated. The structure, morphology, and magnetic properties of the products were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, Fourier transform infrared spectroscopy （FT-IR）, and vibrating sample magnetometer （VSM）. It is confirmed that the as-prepared nanoparticles have been modified by using the surfactant during the synthesis process. The amount of the surfactant has an effect on the size, the dispersal, and the magnetic properties of the particles. Besides, the mechanisms of the influences were also discussed.Fe3O4 magnetic nanoparticles were synthesized by the hydrothermal method, and the influences of the surfactant sodium bis（2-ethylhexyl） sulfosuecinate （AOT） on the particles were investigated. The structure, morphology, and magnetic properties of the products were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, Fourier transform infrared spectroscopy （FT-IR）, and vibrating sample magnetometer （VSM）. It is confirmed that the as-prepared nanoparticles have been modified by using the surfactant during the synthesis process. The amount of the surfactant has an effect on the size, the dispersal, and the magnetic properties of the particles. Besides, the mechanisms of the influences were also discussed.

关 键 词：SURFACTANT magnetite nanoparticle HYDROTHERMAL particle size DISPERSION MAGNETISM 

分 类 号：TQ138.11[化学工程—无机化工] Q523[生物学—生物化学]