CONTRAST MATCHED STUDIES OF A SHEARED BINARY COLLOIDAL SUSPENSION

A method is proposed to measure the neutron scattering the partial scattered intensities from a suspension mixture in an H2O/D2O solvent that will match out one of the components. Total and partial neutron-scatter intensities from an aqueous colloidal suspension mixture (volume fraction phi = 0.15) of 91 nm polystyrene latex and 54 nm silica particles in water are reported. Results are given for the mixture at rest and under shear. We comment on the standard assumption that structure factors of components in a mixture should scale with the particle radii.