Facile method to synthesize oleic acid-capped magnetite nanoparticles

We described a simple one-step process for the synthesis of oleic acid-capped magnetite nanoparticles using the dimethyl sulfoxide (DMSO) to oxidize the precursor Fe2+ at 140 °C. By adjusting the alkalinity of the reaction system, magnetite nanoparticles with two sizes of 4 and 7 nm could be easily achieved. And the magnetite nanoparticles coated by oleate were well-monodispersed in organic solvent.