Solidification kinetics of hard-sphere colloidal suspensions

被引：0

作者：

Sinn, C ^{[1
]}

Heymann, A ^{[1
]}

Stipp, A ^{[1
]}

Palberg, T ^{[1
]}

机构：

[1] PMS Opt AE PT, D-60327 Frankfurt, Germany

来源：

TRENDS IN COLLOID AND INTERFACE SCIENCE XV | 2001年 / 118卷

关键词：

colloidal suspensions; hard spheres; nucleation and growth; crystallization kinetics;

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigate the solidification dynamics of hard-sphere colloidal suspensions applying simultaneously small-angle and Bragg light scattering. These experiments allots a consistent picture of nucleation and crystal growth on the level of large-scale density fluctuations and or density fluctuations Oil the level of individual crystallites. We observe a temporally almost constant nucleation rate after all induction time that decreases with supersaturation. The classical expectation for the nucleation rate density as a function of supersaturation is in accordance with our data. We investigate the validity or the Wilson-Frenkel growth law for hard-sphere systems, which also fits our data satisfactorily. The kinetic prefactors are found to be only 2 orders of magnitude smaller (for nucleation) and 1 order of magnitude larger (for crystal growth) than expected from classical considerations. We discuss the influences of particle size polydispersity on our data.

引用

页码：266 / 275

页数：10

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