SUBSTRATES CONTAINING SWITCHABLE FERROMAGNETIC NANOPARTICLES Russian patent published in 2015 - IPC A61K41/00 A61P35/00 H01F1/01 B22F1/02 C22C1/04 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a process of producing organic substrate particles bonded to switchable ferromagnetic nanoparticles with a mean particle diameter ranging from 10 to 1000 nm, to the use of such nanoparticles for hyperthermic treatment of an organism and to a drug for the hyperthermc treatment. As the ferromagnetic nanoparticles used are nanoparticles, which are non-ferromagnetic at first, but become ferromagnetic when the temperature is lowered, these initially non-ferromagnetic dispersed nanoparticles are bonded to the organic substrate particles, and then the nanoparticles bonded to the substrate particles become ferromagnetic as a result of the temperature decrease, initially the switchable ferromagnetic nanoparticles at the temperature of 22°C or higher are not ferromagnetic and become ferromagnetic as a result of cooling down to the temperatures below 22°C. The switchable ferromagnetic nanoparticle comprises Mn and additionally Fe and/or As and preferably have the Fe₂P-structure or Na-Zn-13-structure, alternatively, or may comprise La, Fe and Si.

EFFECT: invention prevents the agglomeration of particles and an increase in the mean particle size.

10 cl, 1 dwg, 2 ex