Focusing and Sorting of Ellipsoidal Magnetic Particles in Microchannels

被引：43
|
作者：
Matsunaga, Daiki [1 ]
Meng, Fanlong [1 ]
Zottl, Andreas [1 ]
Golestanian, Ramin [1 ]
Yeomans, Julia M. [1 ]
机构：
[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England
来源：
PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 19期
关键词：
CELL-SEPARATION; BROWNIAN-MOTION; SHEAR-FLOW; PLANE WALL; MICROFLUIDICS; SUSPENSIONS; SWIMMERS; DROPLET; PHYSICS; DEVICES;
D O I：
10.1103/PhysRevLett.119.198002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a simple method to control the position of ellipsoidal magnetic particles in microchannel Poiseuille flow at low Reynolds number using a static uniform magnetic field. The magnetic field is utilized to pin the particle orientation, and the hydrodynamic interactions between ellipsoids and channel walls allow control of the transverse position of the particles. We employ a far-field hydrodynamic theory and simulations using the boundary element method and Brownian dynamics to show how magnetic particles can be focused and segregated by size and shape. This is of importance for particle manipulation in lab-on-a-chip devices.
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页数：5
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