FIELD: medicine, pharmaceutics.
SUBSTANCE: invention can be used in medicine in production of contrast substances for obtaining images by method of magnetic resonance or fluorescence, means for drug delivery, cell labels. Carbon-containing particles from the group, containing microcrystalline cellulose, colloid carbon and their mixtures, are soaked with water solution of at least one precursor of ferromagnetic metal, such as salt of citric, acetic or formic acid, hydroxyacids or ammonium citrate. Soaked particles are dried and heated in inert and in fact oxygen-free atmosphere at temperature 450-600°C or higher than 700°C. Obtained nanoparticles contain graphite carbon and 3-100 particles of at least one ferromagnetic metal, at least partly encapsulated in graphite carbon. Ferromagnetic particles additionally include metal, selected from the group, containing nickel, cobalt, noble metals and their combinations.
EFFECT: particles of ferromagnetic metal are uniformly distributed and do not form clusters.
27 cl, 5 dwg, 6 ex
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