Expansion and crystallization of a sediment of charged colloidal spheres
Expansion and crystallization of a sediment of charged colloidal spheres
复制标题
带电胶体球沉积物的膨胀和结晶
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
H. Lekkerkerker
中科院分区：
文献类型：
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作者：
J. S. Duijneveldt;J. Dhont;H. Lekkerkerker
通过离心制备非水溶剂中带电胶体颗粒的无定形沉积物。用光散射研究了沉积物高度和体积分数分布到平衡的演变。简单的沉降-扩散方程可以对实验数据进行定量建模。沉积物的顶部在一周内结晶，而沉积物的下部在几个月后没有表现出任何结晶迹象，表明结晶速率具有很强的浓度依赖性。
An amorphous sediment of charged colloidal particles in a nonaqueous solvent was prepared by centrifugation. The evolution of sediment height and volume fraction profile to equilibrium were studied with light scattering. A simple sedimentation–diffusion equation allows the experimental data to be modeled quantitatively. The top of the sediment crystallizes within a week, whereas the lower part of the sediment does not show any sign of crystallization after several months, indicating a strong concentration dependence of crystallization rate.