Fe 3 O 4 nanowires synthesized by electroprecipitation in templates

Abstract

We present an electrochemical technique for growing Fe3O4 nanostructures. Hydrazine and iron compounds in an aqueous solution undergo chemical reactions with hydroxides and form magnetite at the surface of the working electrode of an electrochemical cell. Growth of magnetite in nanoscale templates is demonstrated. X-ray diffraction, transmission electron microscopy, electrical transport measurements, and magnetometry confirm the nature of the deposit. Giant magnetoresistance was observed when the nanowires were granular.