Facile Synthesis of alpha-Fe2O3 Nanostructured Films with Controlled Morphology

Different morphologies of alpha-Fe2O3 films including particles, porous, granular and nanosheets have been prepared by directly oxidizing the as-deposited Fe films in air. The effects of the heating temperature, duration time and the rate of heating have been systematically studied. By adjusting the rapidly oxidation conditions, one can easily control the morphology of alpha-Fe2O3 films from clusters of particles to porous films, and finally to granular films. In addition, through the oxidation process at the low heating rate, alpha-Fe2O3 nanosheets can be easily fabricated on the Si substrate. [doi:10.2320/matertrans.MRA2008449]