Onset of anomalous diffusion in colloids confined to quasimonolayers.
Onset of anomalous diffusion in colloids confined to quasimonolayers.
复制标题
胶体中异常扩散的开始仅限于准单层
DOI：
10.1103/physreve.95.032604
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
M. Oettel
中科院分区：
文献类型：
--
作者：
J. Bleibel;A. Domínguez;M. Oettel
最近的研究表明，在流体界面或通过适当的限制势形成的胶体单层表现出异常的集体扩散。这是由三维（3D）环境流体介导的流体动力学相互作用的结果，当颗粒被限制在二维（2D）流形上时。我们从理论上和数值模拟研究了粒子在实际系统中由正常扩散到异常扩散的交叉，因为粒子受到三维外部势的限制，因此有可能从二维流形中波动，从而形成准单层。
It has been recently shown that a colloidal monolayer, e.g., formed at a fluid interface or by means of a suitable confining potential, exhibits anomalous collective diffusion. This is a consequence of the hydrodynamic interactions mediated by the three-dimensional (3D) ambient fluid when the particles are confined to reside on a two-dimensional (2D) manifold. We study theoretically and with numerical simulations the crossover from normal to anomalous diffusion as the particles are, in real systems, confined by a 3D external potential and thus have the possibility to fluctuate out of the 2D manifold, thus forming a quasimonolayer.