Open-loop electrowetting actuation with micro-stepping
نویسندگان
چکیده
منابع مشابه
Electrowetting dynamics of microfluidic actuation.
When 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 that is directly proportional to the veloci...
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It is shown theoretically and experimentally that opto-electrowetting may be used for both pulling and pushing liquid droplets. A theoretical nalysis based on the Lippmann-equation and an electronic equivalent circuit model allows definition of a voltage and frequency range for which ushing may be achieved, a novelty in electrowetting-based actuation. Experimental confirmation of the effect dem...
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The static shape of droplets under electrowetting actuation is well understood. The steady-state shape of the droplet is obtained on the basis of the balance of surface tension and electrowetting forces, and the change in the apparent contact angle is well characterized by the Young-Lippmann equation. However, the transient droplet shape behavior when a voltage is suddenly applied across a drop...
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The serviceability of microfluidics-based instrumentation including 'lab-on-a-chip' systems critically depends on control of fluid motion. We are reporting here an alternative approach to microfluidics based upon the micromanipulation of discrete droplets of aqueous electrolyte by electrowetting. Using a simple open structure, consisting of two sets of opposing planar electrodes fabricated on g...
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A microactuator for rapid manipulation of discrete microdroplets is presented. Microactuation is accomplished by direct electrical control of the surface tension through two sets of opposing planar electrodes fabricated on glass. A prototype device consisting of a linear array of seven electrodes at 1.5 mm pitch was fabricated and tested. Droplets ~0.7–1.0 ml! of 100 mM KCl solution were succes...
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ژورنال
عنوان ژورنال: Sensors and Actuators A: Physical
سال: 2016
ISSN: 0924-4247
DOI: 10.1016/j.sna.2016.06.034