Monodisperse droplet generation using electrical pulses

Microdroplet generation is of interest due to its use in applications such as drug delivery. Although flow focusing has emerged as the most popular droplet generation technique it does not offer rapid size variation or drop-on-demand capabilities. To overcome this limitation attempts have been made to use high voltage pulses to extract single droplets on demand. Although a step in the right direction, continuous droplet generation and its control have not been investigated. In this paper we study the effect of various electrical and flow parameters on the ability to generate monodisperse droplets (10 - 100 ?m) continuously in a microfluidic setup through electro-generation.