3D AC electro-osmotic pumps  
  Definition: 3D AC electro-osmotic pumps

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Type: Glossary & Dictionary

Category: Conveyor System

Dictionary Definition

Three-dimensional (3D) AC electro-osmotic (ACEO) pumps have recently been developed that are much faster and more robust than previous planar designs. The basic idea is to create a ``fluid conveyor belt'' by placing opposing ACEO slip velocities at different heights. Current designs involve electrodes with electroplated steps, whose heights have been optimized in simulations and experiments. Here, we consider changing the boundary conditions--rather than the geometry--and predict that flow rates can be further doubled by fabricating 3D features with non-polarizable materials. This amplifies the fluid conveyor belt by removing opposing flows on the vertical surfaces, and it increases the slip velocities which drive the flow.

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