Experimental verification of morphological instability in freezing aqueous colloidal suspensions

被引：102
|
作者：
Peppin, S. S. L. [1 ]
Wettlaufer, J. S. [1 ,2 ]
Worster, M. G. [3 ]
机构：
[1] Yale Univ, Dept Geol & Geophys, New Haven, CT 06520 USA
[2] Yale Univ, Dept Phys, New Haven, CT 06520 USA
[3] Univ Cambridge, Dept Appl Math & Theoret Phys, Inst Theoret Geophys, Cambridge CB3 0WA, England
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 23期
关键词：
D O I：
10.1103/PhysRevLett.100.238301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We describe an experimental test of a new theory of the unidirectional freezing of aqueous colloidal suspensions. At low freezing speeds a planar ice lens completely rejects the particles, forming a steady-state compacted boundary layer in the liquid region. At higher speeds the planar interface becomes thermodynamically unstable and breaks down geometrically to trap bulk regions of colloid within. The theoretical stability threshold is determined experimentally, thereby demonstrating that colloidal suspensions can be treated analogously to atomic or molecular alloys.
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页数：4
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