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Joule heating effects on electrokinetic focusing and trapping of particles in constriction microchannels
Zhu JJ; Sridharan S; Hu GQ(胡国庆); Xuan XC; Hu, GQ; Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China.
Source PublicationJOURNAL OF MICROMECHANICS AND MICROENGINEERING
2012-07-01
Volume22Issue:7Pages:075011
ISSN0960-1317
AbstractJoule heating (JH) is a ubiquitous phenomenon in electrokinetic microfluidic devices. Its effects on fluid and ionic species transport in capillary and microchip electrophoresis have been well studied. However, JH effects on the electrokinetic motion of microparticles in microchannels have been nearly unexplored in the literature. This paper presents an experimental investigation of JH effects on electrokinetic particle transport and manipulation in constriction microchannels under both pure dc and dc-biased ac electric fields. It is found that the JH effects reduce the dielectrophoretic focusing and trapping of particles, especially significant when dc-biased ac electric fields are used. These results are expected to provide a useful guidance for future designs of electrokinetic particle handling microdevices that will avoid JH effects or take advantage of them.
KeywordContinuous-flow Particle Electroosmotic Flow Electrodeless Dielectrophoresis Temperature Electrophoresis Separation Transport Solutes Devices Systems
Subject Area微机电系统中的流体力学问题
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000305890600025
Funding OrganizationThis work is supported by NSF under grant no CBET-0853873 and by Clemson University through a start-up package to XX. The support from the National 973 Project (grant no 2011CB707604), NSFC (grant no 50890182) and Knowledge Innovation Program of CAS (KJCX2-YW-H18) to GH is gratefully appreciated as well. We also acknowledge the Open Fund support from LNM.
DepartmentLNM微纳米流体力学
Classification二类/Q2
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46692
Collection非线性力学国家重点实验室
Corresponding AuthorHu, GQ; Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhu JJ,Sridharan S,Hu GQ,et al. Joule heating effects on electrokinetic focusing and trapping of particles in constriction microchannels[J]. JOURNAL OF MICROMECHANICS AND MICROENGINEERING,2012,22(7):075011.
APA Zhu JJ,Sridharan S,胡国庆,Xuan XC,Hu, GQ,&Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China..(2012).Joule heating effects on electrokinetic focusing and trapping of particles in constriction microchannels.JOURNAL OF MICROMECHANICS AND MICROENGINEERING,22(7),075011.
MLA Zhu JJ,et al."Joule heating effects on electrokinetic focusing and trapping of particles in constriction microchannels".JOURNAL OF MICROMECHANICS AND MICROENGINEERING 22.7(2012):075011.
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