Electrothermal enrichment of submicron particles in an insulator-based dielectrophoretic microdevice

doi:10.1002/elps.201700342

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	Electrothermal enrichment of submicron particles in an insulator-based dielectrophoretic microdevice
	Kale A ; Song L ; Lu XY(陆星宇); Yu LD ; Hu GQ(胡国庆); Xuan XC
刊名	ELECTROPHORESIS
	2018-03-01
卷号	39 期号:2018-05-06 页码:887-896
关键词	Electrokinetic Electrothermal flow Joule heating Microfluidics Particle enrichment
ISSN号	0173-0835
DOI	10.1002/elps.201700342
英文摘要	Insulator-based dielectrophoresis (iDEP) exploits in-channel hurdles and posts etc. to create electric field gradients for various particle manipulations. However, the presence of such insulating structures also amplifies the Joule heating in the fluid around themselves, leading to both temperature gradients and electrothermal flow. These Joule heating effects have been previously demonstrated to weaken the dielectrophoretic focusing and trapping of microscale and nanoscale particles. We find that the electrothermal flow vortices are able to entrain submicron particles for a localized enrichment near the insulating tips of a ratchet microchannel. This increase in particle concentration is reasonably predicted by a full-scale numerical simulation of the mass transport along with the coupled charge, heat and fluid transport. Our model also predicts the electric current and flow pattern in the fluid with a good agreement with the experimental observations.
分类号	二类
URL标识	查看原文
WOS关键词	ON-A-CHIP ; ELECTRODELESS DIELECTROPHORESIS ; TEMPERATURE-MEASUREMENT ; ANALYSIS SYSTEMS ; SEPARATION ; DEVICES ; CELLS ; FLOW ; MICROFLUIDICS ; BIOPARTICLES
WOS研究方向	Biochemical Research Methods ; Chemistry, Analytical
语种	英语
WOS记录号	WOS:000426501100020
资助机构	NSF [CBET-1704379] ; University 111 Project of China [B12019] ; NSFC [11272321, 11572334] ; LNM
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/77923]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA 2.Hefei Univ Technol, Sch Instrument Sci & Optoelect Engn, Hefei, Anhui, Peoples R China 3.Chinese Acad Sci, LNM, Inst Mech, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Kale A,Song L,Lu XY,et al. Electrothermal enrichment of submicron particles in an insulator-based dielectrophoretic microdevice[J]. ELECTROPHORESIS,2018,39(2018-05-06):887-896.
APA	Kale A,Song L,陆星宇,Yu LD,胡国庆,&Xuan XC.(2018).Electrothermal enrichment of submicron particles in an insulator-based dielectrophoretic microdevice.ELECTROPHORESIS,39(2018-05-06),887-896.
MLA	Kale A,et al."Electrothermal enrichment of submicron particles in an insulator-based dielectrophoretic microdevice".ELECTROPHORESIS 39.2018-05-06(2018):887-896.