Density-dependent particle separation in microchannels using 3D AC-driven electro-osmotic pumps

Hilber, Wolfgang; Weiß, Bernhard; Saeed, Ahmad; Holly, Roman; Jakoby, Bernhard

doi:10.1016/j.sna.2009.03.029

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…Theoretical modeling of the frequency-dependent pumping was further developed [49] and used to simulate different aspects of the ACEO pumping [50,51]. Furthermore, the effect of several parameters and pumping configurations were investigated, such as studying the effect of channel height, electrochemical reactions, and non-linear surface capacitance of the Debye layer [52]; controlling the pumping direction by switching the voltage using an inclined electrode array [53,54], pumping of two different electrolytes simultaneously through microchannels [55], bubble-free pumping [56,57] as well as ACEO pumping using biased AC/DC signals [48,[58][59][60][61], pulse voltage waveforms [57], square pole-slit electrode arrays [62], and arrays of asymmetric ring electrode pairs in the cylindrical microchannels [63]. Also, the comparison between fluid velocity on arrays of identical electrodes with AC voltage and a traveling-wave potential demonstrated that traveling-wave potential resulted in a higher fluid velocity [64,65].…”

Section: Aceo Micropumpsmentioning

confidence: 99%

Induced-charge electrokinetics in microfluidics: a review on recent advancements

Manshadi

Mohammadi

Zarei

et al. 2020

J. Micromech. Microeng.

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Applying an external electric field over a polarizable electrode or object within microchannels can induce an electric double layer (EDL) around channel walls and create induced-charge electrokinetics (ICEK) within channels. The primary consequence of the induced charge is the generation of micro-vortices around the polarizable electrode or object, presenting great potential for various microfluidic applications. This review presents the advances in theoretical, numerical and experimental studies on the physics and applications of ICEK within microfluidics. In particular, the characteristics and performance of ICEK-based microfluidic components in active micromixers, micropumps, and microvalves are critically reviewed, followed by discussing the applications of ICEK in electrophoresis and particle/cell manipulation within microfluidics. Furthermore, the opportunities and challenges of ICEK-based microfluidic devices are highlighted. This work facilitates recognizing deliverable ICEK-based microfluidic technologies with unprecedented functionality for the next generation of biomedical applications with predictable manufacturability and functionality.

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Section: Aceo Micropumpsmentioning

confidence: 99%

Induced-charge electrokinetics in microfluidics: a review on recent advancements

Manshadi

Mohammadi

Zarei

et al. 2020

J. Micromech. Microeng.

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“…The features of ACEO are as follows: (1) the working fluid is water, which is inexpensive and useful for biomedical applications; (2) the driving mechanism is simple and miniaturizable without mechanical moving parts [1,2]; (3) the driving electrostatic force is effective on a small scale; and (4) the flow is stable without electrolysis with a relatively low AC voltage [1,2]. Hence, ACEO has been applied to µ-TASs (micro total analysis systems), lab-ona-chips, biosensors, and so on [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional AC electroosmotic micropump with high power density

Watanabe,

Yoshida,

Kim

et al. 2023

J. Micromech. Microeng.

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This paper presents a novel three-dimensional alternating current electroosmosis (ACEO) micropump with high power density. ACEO is a phenomenon to generate a flow of a liquid such as water by applying an AC voltage to the liquid. Using a specific configuration, a net flow due to ACEO becomes unidirectional and an ACEO micropump can be constructed. Many ACEO micropumps have been proposed; however, most of them are of the planar type, and their output power per device volume is not sufficiently high for applications such as micro fluid power sources for μ-TASs, lab-on-a-chips, bio-MEMSs, soft microactuators, and soft microrobots. To achieve a higher output power density, in this study, we proposed an ACEO micropump using an array of plate-cylinder electrodes, which is called PC-ACEO-MP. To induce unidirectional flow efficiently, a square pole-slit electrodes ACEO micropump called SS-ACEO-MP has been proposed using asymmetrical pillar-shaped electrodes. PC-ACEO-MP is an extension of SS-ACEO-MP with a three-dimensional structure. First, the finite element method (FEM) simulations were performed and the results showed that PC-ACEO-MP has the potential to realize high output power with a 1 cm3 effective pump volume using large numbers of plate-cylinder electrodes connected in parallel and in series. Second, a fabrication method using MEMS fabrication process, including electroplating, was proposed and developed for a micro-holed electrode plate that forms parallel cylinder electrodes. The validity of the proposed process was confirmed by fabricating large models and micro-models of the micro-holed electrode plate. The diameter and number of microholes were 10 μm and 36,100, respectively, for the large models and 3 μm and 65,500, respectively, for the micro models. Finally, PC-ACEO-MPs were constructed and their promising pumping characteristics were clarified through experiments using deionized water. The estimated power density was approximately 400 times higher than that of the former high output power ACEO micropump.

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“…ACEO is an effective technique for the manipulation of fluids and particles in microscale systems [1][2][3][4][5]. ACEO is defined as the flow generation in a microchannel at the surface of electrodes where low AC voltage is applied.…”

Section: Introductionmentioning

confidence: 99%

Optimization and parametric study of AC electroosmotic micropumping by response surface method

Farzanehnia

Taheri

2019

SN Appl. Sci.

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Alternative current electroosmotic micropumps (ACEO) have gained a great interest in microfluidics research due to their low operating potential. In this paper, a parametric study is performed on various geometrical parameters of an ACEO micropump design. The problem is modeled and solved numerically using COMSOL Multiphysics. This micropump relies on the grouping of a periodic electrode array in terms of the applied voltage to create asymmetries in the electrode configuration. The pumping velocity is obtained and investigated for various geometry designs. In addition, the optimal parameters are obtained by employing the response surface methodology (RSM). The RSM could predict the effects of different factors affecting the performance of the system and their interactions. The most important parameters affecting the pumping velocity are identified. It is shown that the pumping velocity is controllable. Three various micropump designs with different cost to benefit ratios are presented. These designs are different due to their fabrication cost and the pumping velocity.

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Density-dependent particle separation in microchannels using 3D AC-driven electro-osmotic pumps

Cited by 10 publications

References 20 publications

Induced-charge electrokinetics in microfluidics: a review on recent advancements

Induced-charge electrokinetics in microfluidics: a review on recent advancements

Three-dimensional AC electroosmotic micropump with high power density

Optimization and parametric study of AC electroosmotic micropumping by response surface method

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