Phase Composition of Iron Oxide Nanoparticles Studied Using Hard X-ray Absorption Spectroscopy

At the surface of iron oxide nanoparticles, an oxidized or disordered layer is often found. Due to large surface-to-volume ratio nanomaterials, such a plays important role in overall magnetic properties particles. Consequently, it characterize if applications e.g., for hyperthermia, particle imaging, ferrofluidics, are envisaged. In this work, we tuned phase 14 nm nanoparticles via annealing procedures. The composition particles systematically studied using hard X-ray absorption spectroscopy.