Synthesis and Characterization of Nanometer-Size Fe<sub>3</sub>O<sub>4</sub> and γ-Fe<sub>2</sub>O<sub>3</sub> Particles
Young Soo KangCenter on Polymer Interfaces and Macromolecular Assemblies Department of Chemical Engineering and Materials Science University of California at Davis Davis, California 95616 Center on Polymer Interfaces and Macromolecular Assemblies IBM Almaden Research Center San Jose, California 95120Subhash H. RisbudCenter on Polymer Interfaces and Macromolecular Assemblies Department of Chemical Engineering and Materials Science University of California at Davis Davis, California 95616 Center on Polymer Interfaces and Macromolecular Assemblies IBM Almaden Research Center San Jose, California 95120John F. RaboltCenter on Polymer Interfaces and Macromolecular Assemblies Department of Chemical Engineering and Materials Science University of California at Davis Davis, California 95616 Center on Polymer Interfaces and Macromolecular Assemblies IBM Almaden Research Center San Jose, California 95120Pieter StroeveCenter on Polymer Interfaces and Macromolecular Assemblies Department of Chemical Engineering and Materials Science University of California at Davis Davis, California 95616 Center on Polymer Interfaces and Macromolecular Assemblies IBM Almaden Research Center San Jose, California 95120
1996en
ABI
Аннотация
Synthesis of suspensions of nanosize particles of Fe3O4 was carried out in bulk aqueous solutions without the presence of surfactants. The Fe3O4 nanoparticles were oxidized to γ-Fe2O3 by direct aeration of the suspension at 100 °C. The shape and size distribution and crystallinity of the Fe3O4 nanoparticles were assessed by transmission electron microscopy and selected area electron diffraction. Very uniform and stable colloidal suspensions of the Fe3O4 nanoparticles in water could be synthesized. Oxidation of the colloidal system leads to γ-Fe2O3 nanoparticles of much larger size than Fe3O4.
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