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.

引用

页数：4

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