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Arrayed electrowetting microwells
Applied Physics Letters, 2008Colored oils and aqueous solutions have been electromechanically pumped in and out of arrayed microwells. The microwells comprised pyramidal pits in Si substrates that were coated with an aluminum electrode and a hydrophobic dielectric. These substrates were then suspended between volumes of water and oil.
K. Zhou, J. Heikenfeld
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SPIE Proceedings, 2005
Electrowetting is electrostatic manipulation of liquids. It can be used to displace and deform volumes of polar liquids. A very promising application area is optics. The surface of a volume of liquid can be used as a tunable lens and displacement of the liquid can change the refraction, diffraction or transmission of light when passing through the ...
S. Kuiper +4 more
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Electrowetting is electrostatic manipulation of liquids. It can be used to displace and deform volumes of polar liquids. A very promising application area is optics. The surface of a volume of liquid can be used as a tunable lens and displacement of the liquid can change the refraction, diffraction or transmission of light when passing through the ...
S. Kuiper +4 more
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Electrowetting Dynamics of Microfluidic Actuation
Langmuir, 2005When voltage is suddenly applied to vertical, parallel dielectric-coated electrodes dipped into a liquid with finite conductivity, the liquid responds by rising up to reach a new hydrostatic equilibrium height. On the microfluidic scale, the dominating mechanism impeding this electromechanically induced actuation appears to be a dynamic friction force ...
K-L, Wang, T B, Jones
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Micropumping by Electrowetting
Heat Transfer: Volume 3 — Fluid-Physics and Heat Transfer for Macro- and Micro-Scale Gas-Liquid and Phase-Change Flows, 2001Abstract This paper introduces the recent effort to use surface tension in MEMS, especially, to use electrowetting for efficient pumping in microfluidics. Importance of surface tension in microscale is explained, and examples of utilizing it to design microdevices are presented. Development of several devices employing different types of
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Cheerios Effect Controlled by Electrowetting
Langmuir, 2015The Cheerios effect is a common phenomenon in which small floating objects are either attracted or repelled by the sidewall due to capillary interaction. This attractive or repulsive behavior is highly dependent on the slope angles (angles of the interface on the wall or floating object with respect to a horizontal line) that can be mainly controlled ...
Junqi, Yuan, Jian, Feng, Sung Kwon, Cho
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Electrowetting — From statics to dynamics
Advances in Colloid and Interface Science, 2014More than one century ago, Lippmann found that capillary forces can be effectively controlled by external electrostatic forces. As a simple example, by applying a voltage between a conducting liquid droplet and the surface it is sitting on we are able to adjust the wetting angle of the drop.
Longquan, Chen, Elmar, Bonaccurso
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Electrowetting-based microoptics
2016This Chapter discussed the following: brief history of electrowetting; surface tension; contact angle; liquid lens focal length; tunable liquid microlens; electrowetting-based microlens on a flexible curvilinear surface; arrayed electrowetting prism and switchable microlens; electrowetting-controlled liquid mirror; electrowetting-driven optical switch ...
null Chenhui Li, null Hongrui Jiang
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Electrowetting: Electrocapillarity, saturation, and dynamics
The European Physical Journal Special Topics, 2011Electrowetting is an electrocapillary phenomenon, i.e. the surface charge generated at the solid-liquid interface through an external voltage improves the wettability in the system. The Young-Lippmann equation provides the simplest thermodynamic framework and describes electrowetting adequately. Saturation, i.e.
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