摘要
实验中应用水相合成法制备Fe3O4/Au纳米复合微粒,通过对复合微粒生成过程的光谱检测,对生成物的磁响应性检测和采用HGMF磁分离,表明绝大多数颗粒既具有磁性,又具有纳米Au的特征。将获得的不同粒径的磁性颗粒分别与纯Fe3O4,Au纳米微粒进行选区电子衍射对比分析。结果表明,粒径越小的复合颗粒的衍射花样越接近纯Fe3O4,随粒径的增大,与纯Fe3O4的差异增大;当粒径增大到(15.8±2.8)nm,衍射花样与纯Au纳米颗粒的完全吻合,间接证实了Fe3O4/Au纳米复合微粒的核壳结构。
The Fe3O4/Au composite nanoparticles were synthesized in solution. The results according to the process spectroscopic detection and checking of the magnetic resonance and magnetical separation of resultant by HGMF indicate that the most of composite particles possess both magnetism and Au characteristic. The comparisons of selected area electron diffraction patterns of the nanocomposites with various sizes to those of pure Fe3O4 or pure Au nanoparticles were done. The result shows that smaller composite nanoparticles have the same diffraction pattern as the pure Fe3O4 nanoparticles. With increase of size, their pattern deviates from that of pure Fe3O4. And when the particle size increases to （15.8±2.8） nm, their pattern is consistent with that of pure Au nanoparticles. And the core shell structure of the composite particles has been proved indirectly.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第3期504-508,共5页
Rare Metal Materials and Engineering
基金
湖北省教育厅经费资助项目(2003A004)
关键词
Fe3O4/Au
纳米复合微粒
结构表征
衍射图像
核壳
磁性
Fe3O4/Au
nanocomposite particles
structure characterization
diffraction images
core-shell
magnetism
