Fabrication of magnetite nanorods by ultrasound irradiation

Magnetite nanorods have been prepared by the sonication of aqueous iron(II) acetate in the presence of beta -cyclodextrin. The properties of the magnet ite nanorods were characterized by x-ray diffraction, Mossbauer spectroscop y, transmission electron microscopy, thermogravimetric analysis, and magnet ization measurements. The as-prepared magnetite nanorods are ferromagnetic and their magnetization at room temperature is similar to 78 emu/g. The par ticle sizes measured from transmission electron micrographs are about 48/14 nm (L/W). A mechanism for the sonochemical formation of magnetite nanorods is discussed. (C) 2001 American Institute of Physics.