Transport and diffusion properties of interacting colloidal particles in two-dimensional microchannels with a periodic potential.
Transport and diffusion properties of interacting colloidal particles in two-dimensional microchannels with a periodic potential.
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具有周期性电势的二维微通道中相互作用的胶体颗粒的传输和扩散特性。
DOI：
10.1103/physreve.91.022313
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
P. Nielaba
中科院分区：
文献类型：
--
作者：
U. Siems;P. Nielaba
我们报告了一个布朗动力学模拟研究的二维系统的排斥性胶体粒子在一个通道的几何形状与正弦基板的影响下，一个恒定的驱动潜力。这种驱动的结构，流动性和扩散的影响进行了讨论，以及扭结和反扭结孤子的外观。六方晶体结构的竞争秩序原则，衬底的周期，以及由于限制壁的分层可以是可解释的或不可解释的。这三者的结合产生了新的效果。由于边界线和中线之间的能量差，可以观察到扭结和反扭结的同时发生，并且可以发现半导体中的电子-空穴电导率的相似性。
We report a Brownian dynamics simulation study of a two-dimensional system of repulsive colloidal particles in a channel geometry with a sinusoidal substrate potential under influence of a constant driving. The effect of this driving on the structure, mobility, and diffusion is discussed as well as the appearance of kink and antikink solitons. The competing order principles of the hexagonal crystal structure, the period of the substrate, and the layering due to the confining walls can be either commensurable or incommensurable. The combination of those three leads to new effects. The simultaneous occurrence of kinks and antikinks can be observed, due to the energy difference between boundary- and midlanes, and similarities to the electron-hole conductivity in a semiconductor can be found.