Lurio L B, Lumma D, Sandy A R, Borthwick M A, Falus P, Mochrie S G, Pelletier J F, Sutton M, Regan L, Malik A, Stephenson G B
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
Phys Rev Lett. 2000 Jan 24;84(4):785-8. doi: 10.1103/PhysRevLett.84.785.
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.
本文给出了X射线光子相关光谱和小角散射测量结果，这些测量针对的是分散在甘油中的电荷稳定化聚苯乙烯胶乳球浓悬浮液的动力学和结构，其体积分数范围为3%至52%。悬浮液的静态结构基本上呈现硬球行为，短时间动力学与波矢相关的集体扩散系数的预测结果吻合良好。然而，发现中间散射函数违反了先前在空间稳定化硬球悬浮液中发现的标度行为。
