Nanoparticle manganese zinc ferrites synthesized using reverse micelles

A method for forming monodispersed magnetic nanoparticles of manganese zinc ferrite;

• said method comprising the steps of:
• providing a first micelle solution comprising zinc, manganese and iron metal salts, a first surfactant, and a first hydrocarbon;
• adjusting the pH of the first micelle solution to a pH in the range of 8.0 to 11.0 by adding a second micelle solution comprising ammonium hydroxide, a second surfactant, and a second hydrocarbon;
• mixing the first micelle solution with the second micelle solution to form a ferrite precursor precipitate;
• recovering the ferrite precursor precipitate;
• washing the ferrite precursor precipitate to remove residual first surfactant and second surfactant;
• recovering a resulting powder after said washing step;
• and
• annealing the resulting powder at a temperature in the range of 300° C. to 525° C. in an inert gas environment to produce the nanoparticles of manganese zinc ferrite having a spinel crystal structure.