Electroosmotic flow pumps with polymer frits

Zeng, Shulin; Chen, Chuan‐Hua; Santiago, Juan G.; Chen, Jing-Ran; Zare, Richard N.; Tripp, Jennifer A.; Švec, František; Fréchet, Jean M. J.

doi:10.1016/s0925-4005(01)01007-3

Cited by 101 publications

(60 citation statements)

References 5 publications

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“…Newfound attention has been given to electrokinetic energy conversion devices including electroosmotic pumps ( [1][2][3][4][5][6][7][8][9][10][11][12], see ref. [7] for a review of micropumps by Laser and Santiago) and electrokinetic generators [13][14][15][16][17] due to their potential for integration into micro-and nanofluidic systems.…”

Section: Introductionmentioning

confidence: 99%

Effects of Stern layer conductance on electrokinetic energy conversion in nanofluidic channels

Davidson

Xuan

2008

Electrophoresis

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A thermo-electro-hydro-dynamic model is developed to analytically account for the effects of Stern layer conductance on electrokinetic energy conversion in nanofluidic channels. The optimum electrokinetic devices performance is dependent on a figure of merit, in which the Stern layer conductance appears as a nondimensional Dukhin number. Such surface conductance is found to significantly reduce the figure of merit and thus the efficiency and power output. This finding may explain why the recently measured electrokinetic devices performances are far below the theoretical predictions where the effects of Stern layer conductance have been ignored.

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Section: Introductionmentioning

confidence: 99%

Effects of Stern layer conductance on electrokinetic energy conversion in nanofluidic channels

Davidson

Xuan

2008

Electrophoresis

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“…Now the flow rate of the present micropump is compared with those of the several reported micropumps. For comparison, the flow rate has been expressed in the style of the flow rate per unit voltage and unit area performance of the pump; 0.000 6 (ml/min/)V/cm 2 was reported by Gan et al (3) , 0.001 (ml/min/)V/cm 2 by Zeng et al (4) and 0.03 (ml/min/)V/cm 2 by Yao et al (5) , while it is 0.015 (ml/min/)V/cm 2 for Polystyrene latex colloid dispersion shown in Fig. 11, and 0.03 (ml/min/)V/cm 2 for NaCl and KCl solutions of Fig.…”

Section: Electrophoresis and Electro-osmosismentioning

confidence: 99%

“…In particular, the method making use of electric effects has recently attracted much attention, because it gives smooth flow by the structure of no movable mechanical part and makes easy control of the flow rate by changing voltages applied. Electroosmosis has been most widely utilized among the electric effects: Electroosmotic flow micropumps were fabricated with base on capillary systems packed with silica particles (2) , a porous core packed with sintered glass beads (3) , a densely packed particle structure between the polymer frits (4), (5) , a donut channel constructed by a gap between two parallel donut-shaped glass plates (6) . However, relatively high voltages and complicated structures are required for those methods used so far.…”

Section: Introductionmentioning

confidence: 99%

Micro-Flow Control and Micropump by Applying Electric Fields through a Porous Membrane

Hasegawa

Toga

Morita

et al. 2004

JSME international journal. Ser. B, Fluids and thermal engineer

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Experiments of micro-flow control and micropump conducted by applying electric fields on the flow through a porous membrane have clarified that only NaCl solution in water is effective for the control of micro-flow among the liquids examined but KCl solution and a colloidal dispersion of polystyrene latex particles in water as well as NaCl solution are good as working fluids for the micropump. Although the applied voltages are less than 10 V, performance of the present micropump is found belonging to the highest class in the past methods. Effects of electro-osmosis, electrophoresis and absorption were discussed about whether or not they may become causes of the present phenomena and it is concluded that absorption is most possible as a cause. The colloidal dispersion of polystyrene latex particles is thought to be a good working liquid, because it provides the flow rate proportional to the applied voltage without generating any bubble of by-product.

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“…The power consumption of this device is in milliwatts [4]. Electrokinetic pumps were used to pump liquids in microchannels with flow rates less than 1 mL/min [15].…”

Section: Related Prior Workmentioning

confidence: 99%

Cooling of integrated circuits using droplet-based microfluidics

Pamula¹,

Chakrabarty²

2003

Proceedings of the 13th ACM Great Lakes Symposium on VLSI - GLSVLSI '03

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Decreasing feature sizes and increasing package densities are making thermal issues extremely important in IC design. Uneven thermal maps and hot spots in ICs cause physical stress and performance degradation. Many MEMS and microfluidics-based solutions were proposed in the past. We present a cooling method based on high-speed electrowetting manipulation of discrete submicroliter droplets under voltage control with volume flow rates in excess of 10 mL/min. We also propose a flow-rate feedback control where the hot areas get increased supply of droplets without the need for external sensors and electrothermocapillary control where hot areas attract droplets due to thermocapillarity and are returned to their reservoirs by electrowetting resulting in a self-contained and a self-regulated system.

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Electroosmotic flow pumps with polymer frits

Cited by 101 publications

References 5 publications

Effects of Stern layer conductance on electrokinetic energy conversion in nanofluidic channels

Effects of Stern layer conductance on electrokinetic energy conversion in nanofluidic channels

Micro-Flow Control and Micropump by Applying Electric Fields through a Porous Membrane

Cooling of integrated circuits using droplet-based microfluidics

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