Thermosensitive magnetic fluids

Magnetic core - shell particles were synthesized by the attachment of a polymeric brush on the surface of magnetite nanoparticles. The hybrid particles are well dispersible in good solvents for the polymeric shell and form thermoreversible magnetic fluids in carrier fluids with a critical solution behaviour. The thermoresponsive effect can be activated by the application of a high frequency electromagnetic field and may be useful for magnetic separation, recoverable catalysts and for drug release purposes.