High-temperature investigations of magnetite (Fe3O4)

Magnetite (Fe3O4): Properties, Synthesis, and Applications

Investigation of magnetite Fe3O4 nanoparticles for magnetic hyperthermia

The paper presents the investigation of magnetic nanoparticles (MNPs) dedicated to hyperthermia application. The crystal structure and size distributions have been determined by means of transmission electron microscope (TEM) and X-ray diffraction (XRD). Magnetic properties of the nanoparticles were tested by Mössbauer spectroscopy together with calorimetric experiments. The Mössbauer spectrosc...

Modelling Magnetite Biomineralisation: The Interactions of Proteins and Fe3O4 Surfaces

The biosynthesis of magnetite is the earliest known example of biomineralisation; however, much of the detailed atomistic mechanisms by which the process occurs are unknown. Within the bacterial strain Magnetospirillum magneticum AMB-1, the formation of magnetite nanoparticles is thought to occur under the influence of the Mms6 protein. The C–terminal of this protein is highly acidic, containin...

Magnetite Fe3O4 Nanocrystals: Spectroscopic Observation of Aqueous Oxidation Kinetics†

Low-temperature oxidation of aqueous magnetite nanoparticles to maghemite has been monitored via the loss of near-IR optical absorbance. The kinetics closely follows the diffusion in a sphere model as suggested by previous literature reports. The temperature dependence of the diffusion constant is described by an Arrhenius equation with an activation energy of 21.0 kcal/mol. No intermediate opt...

A new precursor for preparation of magnetite (Fe3O4) nanoparticles

An anionic Fe(II) complex, (BMIM)4[Fe(CN)6] (where BMIM is 1-butyl-3-methylimidazolium), was synthesized in ionic liquid [BMIM][PF6] under reflux condition. The complex was characterized by elemental analysis and spectroscopic methods. The magnetite (Fe3O4) nanoparticles were prepared by the hydrothermal and solvothermal (in ionic liquid [BMIM][PF6]) methods from (BMIM)4[Fe(CN)6] as a precursor...