Synthesis and Physical Properties of Co3O4 Nanowires

By carefully controlling the reacting time, temperature, and humidity, we have prepared Co 3 O 4 nanowires by heating a pure cobalt foil in atmosphere. Scanning electronic microscopy demonstrates that the nanowires have a diameter ranging from 20 to 100 nm and their typical lengths are in the range of 10−20 μm. X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectrum, and transmission electronic microscopy analyses demonstrate that the nanowires are Co 3 O 4 . The optical property of the nanowires is determined by photoluminescence spectrum. The magnetic behavior of it is investigated by a magnetic property measurement system. The nanowires exhibit some novel optical and magnetic properties, which are different from its bulk material.