Dielectrophoretic choking phenomenon in a converging-diverging microchannel for Janus particles

doi:10.1002/elps.201800368

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Dielectrophoretic choking phenomenon in a converging-diverging microchannel for Janus particles
	T.Zhou; X.Ji; L.Y.Shi; X.M.Zhang; Y.B.Deng; S.W.Joo
刊名	Electrophoresis
	2019
卷号	40 期号:6 页码:993-999
关键词	Choking,dielectrophoresis (DEP),Janus particle,microchannel,constriction,electrophoretic motion,deformable particle,separation,Biochemistry & Molecular Biology,Chemistry
ISSN号	0173-0835
DOI	10.1002/elps.201800368
英文摘要	The dielectrophoretic (DEP) choking phenomenon is revisited for Janus particles that are transported electrokinetically through a microchannel constriction by a direct-current (DC) electric field. The negative DEP force that would block a particle with a diameter significantly smaller than that of the constriction at its inlet is seen to be relaxed by the rotation of the Janus particle in a direction that minimizes the magnitude of the DEP force. This allows the particle to pass through the constriction completely. An arbitrary Lagrangian-Eulerian (ALE) numerical method is used to solve the nonlinearly coupled electric field, flow field, and moving particle, and the DEP force is calculated by the Maxwell stress tensor (MST) method. The results show how Janus particles with non-uniform surface potentials overcome the DEP force and present new conditions for the DEP choking by a parametric study. Particle transportation through microchannel constrictions is ubiquitous, and particle surface properties are more likely to be non-uniform than not in practical applications. This study provides new insights of importance for non-uniform particles transported electrokinetically in a microdevice.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/62730]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	T.Zhou,X.Ji,L.Y.Shi,et al. Dielectrophoretic choking phenomenon in a converging-diverging microchannel for Janus particles[J]. Electrophoresis,2019,40(6):993-999.
APA	T.Zhou,X.Ji,L.Y.Shi,X.M.Zhang,Y.B.Deng,&S.W.Joo.(2019).Dielectrophoretic choking phenomenon in a converging-diverging microchannel for Janus particles.Electrophoresis,40(6),993-999.
MLA	T.Zhou,et al."Dielectrophoretic choking phenomenon in a converging-diverging microchannel for Janus particles".Electrophoresis 40.6(2019):993-999.