期刊
JOURNAL OF EXPERIMENTAL NANOSCIENCE
卷 4, 期 3, 页码 259-267出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17458080802570609
关键词
magnetite nanoparticles; surface modification; colloidal stability; magnetic stability
类别
资金
- Vietnam National University, Hanoi [QC. 08.08]
- Fundamental Research Program of Vietnam [410.406]
Magnetic Fe3O4 nanoparticles are prepared by the coprecipitation method and coated with starch as a surfactant. Their structural and magnetic behaviours are studied by means of X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), Raman spectrum, Fourier Transform Infrared (FT-IR) as well as with a Vibrating Sample Magnetometer (VSM). The magnetic Fe3O4 nanoparticles under investigation have an average size of about 14 nm. The coated magnetic nanoparticles exhibit super-paramagnetic behaviours with a blocking temperature of about 170 K and saturation magnetisation ranging between 30 and 50 emu g-1. In addition, the results of FT-IR indicated that interactions between the Fe3O4 particles and starch layers are much improved.
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