Biochip Journal, 2009, 3(3), 203-207

 

Interfacial tension-mediated droplet fusion in rectangular microchannels

 

Jongin Hong, Minsuk Choi, Andrew J. deMello, Joshua B. Edel

 

We successfully demonstrate the merging of aqueous droplets within a microfluidic channel mediated by a difference in interfacial tension. Interfacial tension is shown to have a significant influence on the hydrodynamic forces associated with a segmented flow in a rectangular microchannel and results in the possibility of merging multiple droplets in a simple fashion. This facility is important in allowing droplet-based microfluidic systems to be used as synthetic tools in complex reaction processing.