Wensink H H, Löwen H
Institut für Theoretische Physik, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
Phys Rev Lett. 2006 Jul 21;97(3):038303. doi: 10.1103/PhysRevLett.97.038303.
We study the response of a nematic colloidal dispersion of rods to a driven probe particle which is dragged with high speed through the dispersion perpendicular to the nematic director. In front of the dragged particle, clusters of rods are generated which rhythmically grow and dissolve by rotational motion. We find evidence for a mesoscopic cluster-cluster correlation length, independent of the imposed drag speed. Our results are based on nonequilibrium Brownian dynamics computer simulations and in line with a dynamical scaling theory.
我们研究了棒状向列型胶体分散体系对一个被驱动的探针粒子的响应，该探针粒子以高速垂直于向列型指向矢拖曳通过分散体系。在被拖曳粒子的前方，会生成棒状粒子簇，这些粒子簇通过旋转运动有节奏地生长和溶解。我们发现了一个介观的簇 - 簇关联长度的证据，它与所施加的拖曳速度无关。我们的结果基于非平衡布朗动力学计算机模拟，并且与动力学标度理论一致。
