When particles suspended in a fluid are driven through a regular lattice of cylindrical obstacles, the particle motion is usually not simply in the direction of the force, and in the high Peclet number limit particle trajectories tend to lock along certain lattice directions. By means of molecular dynamics simulations we show that this effect persists in the presence of molecular diffusion for nanoparticle flows, provided the Peclet number is not too small. We examine the effects of varying particle and obstacle size, the method of forcing, solid roughness, and particle concentration. While we observe trajectory locking in all cases, the degree of locking varies with particle size and these flows may have application as a separation technique.
Inherent fluctuation-mediated equivalent force drives directional motions of nanoscale asymmetric particles -- Surf-riding of asymmetric molecules in thermal fluctuations
Study of the Molecular Level Mechanism of Nanoscale Alternating Current Electrohydrodynamic Flow
The University of Queensland（昆士兰大学）；Australian Institute of Bioengineering and Nanotechnology, The University of Queensland（昆士兰大学生物工程与纳米技术研究所）；School of Chemistry and Molecular Biosciences, The University of Queensland（昆士兰大学化学与分子科学学院）；Griffith University（格里菲斯大学）；School of Environment and Science, Griffith University（格里菲斯大学环境与科学学院）；ARC Centre of Excellence for Green Electrochemical Transformation of Carbon Dioxide, The University of Queensland（昆士兰大学二氧化碳绿色电化学转化卓越研究中心）
