A Capillary Microgripper based on Electrowetting
An electrowetting based capillary microgripper, which can pick up and release micro-objects, is presented. Electrowetting was utilized to dynamically change the contact angle between the liquid bridge and the gripper surface to control the capillary lifting forces. A coplanar interdigitated goldelectrode pair was employed to simplify the microfabrication. The lifting force generated by the microgripper was experimentally characterized. The pickup and release routine was demonstrated for various micro glass beads whose weight ranges from 77 to 136 μN. The design, microfabrication, and testing of the microgripper are presented.
Applied Physics Letters
Vasudev, Abhay and Zhe, Jiang, "A Capillary Microgripper based on Electrowetting" (2008). Mechanical Engineering Faculty Research. 981.