Diffusion enhancement in on/off ratchets

被引：6

作者：

Germs, W. Chr ^{[1
]}

Roeling, E. M. ^{[1
]}

van IJzendoorn, L. J. ^{[1
]}

Janssen, R. A. J. ^{[1
]}

Kemerink, M. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, NL-5600 MB Eindhoven, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 07期

关键词：

TILTED PERIODIC POTENTIALS; BROWNIAN MOTORS; TRANSPORT; PARTICLES; MOTION;

D O I：

10.1063/1.4793198

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show a diffusion enhancement of suspended polystyrene particles in an electrical on/off ratchet. The enhancement can be described by a simple master equation model. Furthermore, we find that the diffusion enhancement can be described by a general curve whose shape is only determined by the asymmetry of the ratchet repeat unit. The scaling of this curve can be explained from an analytical expression valid for small off-times. Finally, we demonstrate how the master equation model can be used to find the driving parameters for optimal particle separation. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793198]

引用

页数：5

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