Method for producing stable dispersible magnetic iron oxide single-core nanoparticles, stable dispersible magnetic iron oxide single-core nanoparticles and uses of same

A method for continuous production of stably dispersible, magnetic, single-core nanoparticles, which comprise iron oxide and have a diameter between 20 and 200 nm, comprising the steps of:

• a) preparing an aqueous solution comprising at least one base and at least one oxidant;
• b) preparing an aqueous solution comprising at least one iron salt and another iron salt which is different from the at least one iron salt and in a lower concentration;
• c) preparing an aqueous solution comprising at least one hydrophilic stabiliser;
• d) mixing the aqueous solution of a) and b) to form a mixture in a micromixer, Fe(OH)2 being formed, which precipitates out of the solution and oxidises to form magnetic single-core nanoparticles comprising iron oxide;
• e) mixing the mixture from d) with the aqueous solution from c), wherein the at least one hydrophilic stabiliser bonds to the iron oxide;
• wherein, in a) to e), the temperature is controlled from 10° C. to 200° C., and
• wherein the stably dispersible, magnetic, single-core nanoparticles are produced.