Controlling Charge on Levitating Drops

摘要: Levitation technologies are used in containerless processing of materials, as microscale manipulators and reactors, the study single drops particles. Presented here is a method for controlling amount polarity charge on levitating drop. The uses single-axis acoustic levitation to trap levitate single, initially neutral drop with diameter between 400 microm 2 mm. This then charged controllable manner using discrete packets form produced by piezoelectric drop-on-demand dispenser equipped charging electrode. magnitude dispensed can be adjusted varying voltage applied added changed allowing removal from trapped (by neutralization) reversal. maximum limited repulsion like charges trap. scheme aid micromanipulation particles levitation.