Theoretical prediction of fast 3D AC electro-osmotic pumps
Theoretical prediction of fast 3D AC electro-osmotic pumps
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DOI：
10.1039/b608092h
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发表时间：
2006-01-01
期刊：
影响因子：
6.1
通讯作者：
Ben, Yuxing
中科院分区：
文献类型：
--
作者：
Bazant, Martin Z.;Ben, Yuxing
微流体中的交流电渗（ACEO）泵目前涉及平面电极阵列，但最近对感应电荷电渗（ICEO）基本现象的研究表明，可以利用三维（3D）几何形状来实现更快的流动。在本文中，我们提出了周期性 3D ACEO 泵的一些新设计原理，例如 ICEO 流过阶梯式电极阵列的“流体传送带”。这些设计的数值模拟（使用标准低压模型）预测的流速几乎比现有平面 ACEO 泵快二十倍，对于相同的施加电压和最小特征尺寸。这些泵可能会启用新的便携式或可植入芯片实验室设备，因为速度相当快（mm s(-2)），可调节流量应该是可通过电池电压 (< 10 V) 实现。
AC electro-osmotic (ACEO) pumps in microfluidics currently involve planar electrode arrays, but recent work on the underlying phenomenon of induced-charge electro- osmosis (ICEO) suggests that three-dimensional (3D) geometries may be exploited to achieve faster flows. In this paper, we present some new design principles for periodic 3D ACEO pumps, such as the "fluid conveyor belt'' of ICEO flow over a stepped electrode array. Numerical simulations of these designs ( using the standard low-voltage model) predict flow rates almost twenty times faster than existing planar ACEO pumps, for the same applied voltage and minimum feature size. These pumps may enable new portable or implantable lab- on- a- chip devices, since rather fast ( mm s(-2)), tuneable flows should be attainable with battery voltages (< 10 V).