High frequency dynamic ultrasound scattering from microsphere suspensions

A study was carried out to investigate the structure and dynamics of polymer solutions, suspensions, and gels by using high frequency dynamic ultrasound scattering. Dynamic sound scattering (DSS) technique used to determine the complex flow by using glass beads of millimeters and sub-millimeters range. The study found that DSS is capable to monitor more complex dynamics by analyzing time evolution. Standard latex microsphere suspensions were redispersed in an aqueous solution to obtain the suspension with required concentrations. The study used SEM micrographs to verify the particle size and their distribution. The study found that propagation of sound wave, ballistic, and scattering wave was slow, when DSS used. The study observed ultrasound scattering between two-cell walls, when object scale was comparable with the source wave length.