PREPARATION AND CHARACTERIZATION OF MONODISPERSE core-SHELL Fe3O4/SiO2 MICROSPHERES

摘要：

This paper describes a facile route to prepare monodisperse core-shell Fe3O4/SiO2 microspheres with uniform size and shape. The morphology and structures of the products were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results show that spherical Fe3O4WSiO2 microspheres have a well-defined coreshell structure and a much smoother surface with well dispersion and a mean particle size of ～ 600 nm. Furthermore, VSM measurements indicated that the asprepared Fe3O4 and Fe3O4 @ SiO2 microspheres were superparamagnetic at room temperature and the saturation magnetization (Ms) were 58. 110 emu/g and 33. 479 emu/g respectively.

关键词： Magnetic nanoparticles Core/shell structure Silica Saturation magnetization

作者: Li Chuanyan Ma Chao Wang Fang Xi Zhijiang He Nongyue

作者单位: School of Public Health, Southeast University, Nanjing 210096, China State Key Laboratory of Hoelect State Key Laboratory of Hoelectronics, School of Biological Science and Medical Engineering, Nanjing State Key Laboratory of Hoelectronics, School of Biological Science and Medical Engineering, Nanjing

会议类型: 国际会议

会议名称: The 7th International Forum on Post-Genome Technologies and China-Japan-Korea Summit on Natural Products(第七届国际后基因组技术论坛及中日韩天然产物论坛 IFPT)

会议地点: 重庆

会议语种:英文

页码: 121-122

在线出版日期: 2011-10-28（万方平台首次上网日期，不代表论文的发表时间）