X-ray photon correlation spectroscopy and small-angle scattering measurements are presented of the dynamics and structure of concentrated suspensions of charge-stabilized polystyrene latex spheres dispersed in glycerol, for volume fractions from $3\%$ to $52\%$. The static structures of the suspensions show essentially hard-sphere behavior, and the short-time dynamics shows good agreement with predictions for the wave-vector-dependent collective diffusion coefficient. However, the intermediate scattering function is found to violate a scaling behavior found previously for a sterically stabilized hard-sphere suspension [P. N. Segrè and P. N. Pusey, Phys. Rev. Lett. 77, 771 (1996)].

• Received 14 June 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.785