Preparation and Characterization of Amino-coated Maghemite Nanoparticles
The ferrous salt and ferric salt were used as rawmaterials to prepare magnetite (Fe3O4) nanoparticles asprecursors, and then maghemite (γ-Fe2O3) nanoparticles wereobtained from the precursors via high temperature pyrolysis forfurther oxidation ,and corresponding amino-coated maghemitenanoparticles are also obtained via surface modification of 3-aminopropyltriethyloxysilane (APTES). The properties andstructure of nanoparticles are characterized by transmissionelectron microscopy(TEM), energy dispersive spectroscopy(EDS), X-Ray photoelectron spectroscopy (XPS), ultravioletvisible spectra (UV-vis) , fourier transform infrared (FT-IR)spectrometer and magnetic property measurement system(MPMS) with superconducting quantum interference device(SQUID) magnetometry. The result reveals that the amino-coatedmaghemite particles have a slight dimensional increase inaverage diameter, and maintain almost original saturationmagnetization that decreases from 109.2 emu?g -1 to 102.3 emu?g -1after APTES coating. The finding is instructive for surfacefunctionalization of MNPs related to sensing application.
Lei Zeng Rong Hu Zhaohui Wu Quanguo He
Green Packaging and Biological Nanotechnology Laboratory,Hunan University of Technology Zhuzhou 412008, China
国际会议
成都
英文
1-5
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）