Three-body interactions in colloidal systems -: art. no. 031402

被引：57
|
作者：
Dobnikar, J [1 ]
Brunner, M
von Grünberg, HH
Bechinger, C
机构：
[1] Univ Konstanz, Dept Phys, D-78457 Constance, Germany
[2] Univ Stuttgart, Inst Phys 2, D-70550 Stuttgart, Germany
来源：
PHYSICAL REVIEW E | 2004年 / 69卷 / 03期
关键词：
D O I：
10.1103/PhysRevE.69.031402
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We present a direct measurement of three-body interactions in a colloidal system comprised of three charged colloidal particles. Two of the particles have been confined by means of a scanned laser tweezers to a line-shaped optical trap where they diffused due to thermal fluctuations. Upon the approach of a third particle, attractive three-body interactions have been observed. The results are in qualitative agreement with additionally performed nonlinear Poisson-Boltzmann calculations, which also allow us to investigate the microionic density distributions in the neighborhood of the interacting colloidal particles.
引用
收藏
页码：031402 / 1
页数：7
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