Continuous Droplet-Actuating Platforms via an Electric Field Gradient: Electrowetting and Liquid Dielectrophoresis

This work develops a technology for actuating droplets of any size without the requirement high voltages or active control systems, which are typically found in competitive systems. The droplet actuation relies on two microelectrodes separated by variable gap distance to generate an electrostatic gradient. physical mechanism motion is combination liquid dielectrophoresis and electrowetting. Investigating system behavior as function driving frequency identified relative contribution these mechanisms optimum operating conditions. A fixed signal 0.5 kHz actuated various liquids contaminants. Droplet was demonstrated several platforms, including linear, radial-symmetric, bilateral-symmetric motion. electrode designs scalable can be fabricated flexible optically transparent substrate: key advancements will enable consumer applications that were previously inaccessible. self-cleaning platform also tested under laboratory conditions road. has significant potential microfluidics example, automotive sector clean body parts, camera covers, sensors.