METHOD OF DETERMINING SIZE OF MAGNETIC NANOPARTICLES Russian patent published in 2019 - IPC G01N24/08 

FIELD: chemistry.

SUBSTANCE: use: to determine the size of magnetic nanoparticles. Summary of invention consists in the fact that colloidal solutions of nanoparticles with different concentration C of the stabilizing substance are prepared, placed in a magnetic field, magnetization is measured by nuclear magnetic resonance at different instants after preparation or agitation of the solution and two concentrations (C₁ and C₂), at which the magnetization reduction rate has minima. Size of magnetic nanoparticles D is determined by formula D = d(3-X)/(X-1), where d is size of stabilizer molecule, X = [(C₂/ C₁)-l]^0.5.

EFFECT: technical result is enabling determination of full size of magnetic nanoparticles in colloidal solution.

1 cl, 1 dwg