Preparation and characterization of magnetic nanoparticles by γ-irradiation

The reactions of γ-irradiation on a rod type FeOOH in the presence of isopropanol and water have been investigated. With the continued γ-irradiation, a rod type FeOOH nanoparticle disappeared and the product was a spherical γ-Fe2O3 nanoparticle, which had an average size of 30 nm. XRD, SAD and TEM were used to characterize the structural characterization and to determine their morphology, respectively. The VSM spectrum was obtained to study magnetic properties of the products.