Contrast variation with temperature in light scattering for silica particles in diluted solutions

Abstract

The contrast variation technique by varying the temperature is applied to a light scattering study of a colloidal dispersion of sphericals silica particles in cyclohexane. It is found that a refractive index variation occurs in the particle and the refractive index at the periphery is higher than at the center of the particle. The inhomogeneity parameter E has a value of 26 nm2.