Dynamic self-assembly of rings of charged metallic spheres

被引：39
|
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
收藏
页码：1 / 083903
页数：4
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