Colloidal dispersion of magnetite nanoparticles via in situ preparation with sodium polyoxyalkylene di-phosphonates

Hydrosoluble polymers attached to inorganic surfaces allow production of dispersed state particles. Functionalized end-chain polymers were used to prepare stable aqueous magnetite colloidal dispersions. The magnetite nanoparticles were synthesized from coprecipitation of aqueous Fe3+ and Fe2+ ions in the presence of sodium polyoxyalkylene di-phosphonates. Transmission electron microscopy (TEM), dynamic light scattering (DLS), pyroanalysis techniques and isotherm determinations are reported to characterize the nanosized particles. Because of the structure of the interface with the polymer tightly anchored to the surface and the biocompatibility of the polyoxyalkylene chain, new developments might be found in the forthcoming time.