Preparation and characterization of multifunctional Fe_3O_4/ZnO/SiO_2 nanocomposites

摘要

Multifunctional Fe_3O_4/Zn0/SiO_2 nanocomposites were prepared in aqueous solution. The X-ray diffraction pattern, the high-resolution transmission electron microscope image, the energy dispersive spectroscopy and the X-ray photoelectron spectroscopy measurement confirmed the formation of Fe_3O_4/ZnO/SiO_2 nanocomposites. The nanocomposites simultaneously possessed the multiphonon resonant Raman scattering, the photoluminescence and the superparamagnetism at room temperature. One minute is enough to accumulate the nanocomposites by a commercial permanent magnet. And the nanocomposites can be homogeneously redispersed. Compared with Fe_3O_4/Zn0 nanocomposites, the introduction of silica made the nanocomposites more water-soluble and biocompatible. Such multifunctional Fe_3O_4/Zn0/SiO_2 nanocomposites open fascinating prospects in biochemical and biomedical fields.