ADVANCES IN THE RESEARCH OF ELECTROOSMOTIC FLOWS IN MICRO/NANOFLUIDIC SYSTEMS
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摘要:简要介绍了微/纳流控系统中双电层和电渗流的基本原理、当前研究热点以及最新进展.从胶体界面理论出发,基于流体连续性模型和微纳米尺度流动的多物理场数值分析法,介绍了电渗流特性, 如焦耳热效应、 反离子效应、 表面电场调控双电层、双流体输运和周期电渗输运等电渗流控制方法.最后对电渗流测量作简要介绍.
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关键词:
- 微/纳流控系统, 电渗流,双电层
Abstract:Micro/nanofluidicsystem is an interdisciplinary research frontier associated withfluid mechanics, biology, chemistry, electricity and heattransfer, and electroosmosis is one of the most importantfoundamental problems associated with fluid mechanics inmicro/nanofluidic system. With rapid advances in micro/nanofluidicsystem a variety of electroosmosis phenomena, especially innona-scale, has attracted great attentions in academic sector.Electric double layer and electroosmotic flows play an importantrole in functional analysis and optimal design ofmicro/nanofluidic chips. To provide a brief review inmicro/nanofluidic field this paper presents respectivelyfoundamental principle of electric double layer andelectroosmosis, current research hotspot and latest prograsses inmicro/nanofluidic systems. Based on colloidal and interfacetheory, continuum model of fluid mechanics and numericalsimulation of multi-physics interaction this paper reviews currenthotspots associated with electroosmotic flows in micro/nanofluidicsystems, such as Joule heating effects, reverse ionic effects,double-fluid transport, AC electroosmosis, periodical fluidtransport, field-modulating electric double layer andelectroosmosis controlling. Finaly, a brief review is given formeasurement methodologies of electroosmosis in micro/nanofluidicsystems.
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