title: On-demand electrostatic droplet charging and sorting.
abstract: This study reports a droplet-based microfluidic device for on-demand electrostatic droplet charging and sorting. This device combines two independent modules: one is a hydrodynamic flow focusing structure to generate water-in-oil droplets, and the other is the two paired-electrodes for charging and sorting of the droplets. Depending on the polarity on charging electrodes, water-in-oil droplets can be electrostatically charged positively or negatively, followed by automatic real-time electric sorting. This approach will be useful when preformed droplets, with a positive, a negative, or with no charge, need to be manipulated for further on-chip droplet manipulation.
authors.affiliation: SMALL (Sensors and MicroActuators Learning Lab), Department of Electrical Engineering, University at Buffalo, The State University of New York (SUNY-Buffalo), Buffalo, New York 14260, USA.
authors.forename: Byungwook
authors.initials: B
authors.lastname: Ahn
authors.forename: Kangsun
authors.initials: K
authors.lastname: Lee
authors.forename: Rajagopal
authors.initials: R
authors.lastname: Panchapakesan
authors.forename: Kwang W
authors.initials: KW
authors.lastname: Oh