Determination of the size distribution function for nanoparticles by ultracentrifugation method

摘要

In recent years, ultracentrifugation method was developed, due to the growth of research in the field of nanotechnology. Ultracentrifugation is the most rigorous way to determine the molecular mass and hydrodynamic properties of macromolecules and colloidal particles. This method is applicable to both organic and inorganic substances to strictly speaking to any substance whose optical prop-erties are different from the solvent. To assess the capability of the method of ultracentrifugation, to metal oxide sols, experiments were conducted to determine the particle size of silicon oxide SiO2 and zirconium oxide ZrO2 in colloidal solutions. An approach is proposed which not only allows calculating the average size of sol particles, but also determining the shape of the particle size distribution function in the test sol.