A microfluidic platform for on-demand formation and merging of microdroplets using electric control |
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Authors: | Gu Hao Murade Chandrashekhar U Duits Michael H G Mugele Frieder |
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Institution: | Physics of Complex Fluids, Faculty of Science and Technology, IMPACT and MESA+ Institutes, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands |
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Abstract: | We discuss a microfluidic system in which (programmable) local electric fields originating from embedded and protected electrodes are used to control the formation and merging of droplets in a microchannel. The creation of droplets-on-demand (DOD) is implemented using the principle of electrowetting. Combined with hydrodynamic control, the droplet size and formation frequency can be varied independently. Using two synchronized DOD injectors, merging-on-demand (MOD) is achieved via electrocoalescence. The efficiency of MOD is 98% based on hundreds of observations. These two functionalities can be activated independently. |
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