title: Absence of scaling for the intermediate scattering function of a hard-sphere suspension: static and dynamic x-ray scattering from concentrated polystyrene latex spheres.
abstract: 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.
authors.affiliation: Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
authors.forename: L B
authors.initials: LB
authors.lastname: Lurio
authors.forename: D
authors.initials: D
authors.lastname: Lumma
authors.forename: A R
authors.initials: AR
authors.lastname: Sandy
authors.forename: M A
authors.initials: MA
authors.lastname: Borthwick
authors.forename: P
authors.initials: P
authors.lastname: Falus
authors.forename: S G
authors.initials: SG
authors.lastname: Mochrie
authors.forename: J F
authors.initials: JF
authors.lastname: Pelletier
authors.forename: M
authors.initials: M
authors.lastname: Sutton
authors.forename: L
authors.initials: L
authors.lastname: Regan
authors.forename: A
authors.initials: A
authors.lastname: Malik
authors.forename: G B
authors.initials: GB
authors.lastname: Stephenson