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