摘要
本文采用溶剂热法以尿素作为沉淀剂和模板剂成功制备了一系列内外径可控的空心Fe3O4磁性纳米颗粒。利用透射电子显微镜(TEM)、X射线衍射仪(XRD)、振动样品磁强计(VSM)对所制备的Fe3O4磁性纳米颗粒的形貌、结构及其宏观磁性进行了详细的表征。TEM结果显示,该方法制备的Fe3O4磁性纳米颗粒均呈现内部空心结构,外径约为615 nm,内径约为310 nm,且尺寸均匀,分散性良好;样品的饱和磁化强度Ms=90.4 emu/g,矫顽力He=62.5 Oe呈现铁磁性。同时发现,Fe3O4粒径随尿素加入量的增大而减小。本文报道的空心结构的Fe3O4磁性纳米颗粒有望在纳米医学及纳米生物学上具有广泛的应用前景。
In this paper, hollow Fe3 O4 nanospheres with tunable inner-and outer-diameter were fabricated through solvothermal method in which urea was used as precipitant and template. Their structure, morphology and crystal structure were characterized at the nanoscale by TEM, XRD and VSM. It is found that the hollow Fe3 O4 nanospheres are well dispersed with uniform size and smooth surface. The outer-and inner-diameter of the hollow Fe3 O4 nanospheres are about 615 and 310 nm, respectively. The hollow Fe3 O4 magnetic nanoparticles show room temperature ferromagnetic （ RTFM ） behavior with saturation magnetization of 90-4 emu/g and coercivity of 62-5 Oe. In addition, the diameter of the nanospheres can be tuned by changing the amount of urea. It is believed that the hollow Fe3 O4 nanospheres would have a broad applications in the field of nanobiology and nanomedicines.
出处
《电子显微学报》
CAS
CSCD
2015年第3期195-199,共5页
Journal of Chinese Electron Microscopy Society
基金
陕西省自然科学基础研究计划青年人才项目(No.2014JQ1040)
陕西省教育厅专项科研计划项目(No.14JK1727)
西北大学科学研究基金项目(No.13NW13)
陕西省大学生创新创业训练计划项目(No.0705)
关键词
FE3O4
空心结构
电子显微学
磁性
Fe3O4
hollow structure
electron microscopy
magnetic property
