Field-Induced Self-Assembly of Suspended Colloidal Membranes

被引：124
|
作者：
Osterman, N. [1 ]
Poberaj, I. [1 ,2 ]
Dobnikar, J. [2 ,3 ]
Frenkel, D. [3 ]
Ziherl, P. [1 ,2 ]
Babic, D. [1 ]
机构：
[1] Univ Ljubljana, Fac Math & Phys, SI-1000 Ljubljana, Slovenia
[2] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia
[3] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 22期
基金：
欧洲研究理事会;
关键词：
AGGREGATION; MOLECULES;
D O I：
10.1103/PhysRevLett.103.228301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report experiments that probe the self-assembly of micrometer-size colloids into one-particle-thick, robust, and self-healing membranes. In a magic-angle precessing magnetic field, superparamagnetic spheres experience isotropic pair attraction similar to the van der Waals force between atoms. But the many-body polarization interactions among them steer an ordered aggregation pathway consisting of growth of short chains, cross-linking and network formation, network coarsening, and consolidation of membrane patches. This generic aggregation scenario can be induced in any particles of large enough susceptibility.
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页数：4
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