Double-Nozzle Capillary Force Gripper for Cubical, Triangular Prismatic, and Helical 1-mm-Sized-Objects

In this letter, we describe a novel capillary force gripper with two nozzles for the manipulation of complex-shaped micro-objects. These rapidly form constant-volume droplets and have primary functions: fast water refilling by action droplet formation on-off control diaphragm pump. Capillary is dominant microscopic acting on objects all shapes owing to fluidity water. Therefore, it suitable capture release heterogeneous experiments, picked placed 1-mm cubes, triangular prisms, helical micro springs. The positioning errors ±SD each shape were 54 ± 36 μm, 85 32 162 74 respectively. prisms springs are difficult using conventional air nozzles, which typical accuracy approximately 40 μm rectangular prismatic objects. addition, setting distance between an appropriate value, reduced deviation attitude angle around vertical axis ±2.6° self-alignment phenomena cubes. proposed method feasible manipulating fragile micro-objects in micro-electro-mechanical systems field.