Abstract
Moving droplets with a micro catenary. We first describe the advamages of the handling of individual droplets in microfluidic systems. To that end, we use electro-wetting to induce changes in the contact angles of drops in partial wetting. As an electrode and a guide for the drops. we use an original design consisting in a thin (25-50 mm) gold wire used as a microcatenary. The displacement of drops in the micro-liter range is obtained first with an underlying matrix of electrodes and second, by an effect of asymmetric wetting and dewetting obtained by a surface with directed structuration. We report the technology and the fluidic validation.
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