Dynamic self-assembly of rings of charged metallic spheres

被引：40

作者：

Grzybowski, BA ^{[1
]}

Wiles, JA ^{[1
]}

Whitesides, GM ^{[1
]}

机构：

[1] Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.90.083903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This Letter describes dynamic self-assembly in a system of stainless steel spheres (similar to1 mm in diameter) rolling on a flat dielectric surface under the influence of an external magnetic field that rotates parallel to the plane of the surface. As the spheres move, they charge triboelectrically. Self-assembly is mediated by two types of electrostatic interactions among these charges: (i) attraction between negatively charged regions of the surface and positively charged spheres and (ii) repulsion between the like-charged spheres. The spheres organize into highly ordered rings as a result of these electrostatic interactions.

引用

页码：4 / 083903

页数：4

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