Controlled production of emulsion drops using an electric field in a flow-focusing microfluidic device

 
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Author
Kim, Haejune
Luo, Dawei
Link, Darren
Weitz, David A.
Marquez, Manuel
Cheng, Zhengdong
Published Version
https://doi.org/10.1063/1.2790785
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Citation
Kim, Haejune, Dawei Luo, Darren Link, David A. Weitz, Manuel Marquez, and Zhengdong Cheng. 2007. “Controlled Production of Emulsion Drops Using an Electric Field in a Flow-Focusing Microfluidic Device.” Applied Physics Letters91 (13): 133106. https://doi.org/10.1063/1.2790785.
Abstract
We describe a flexible emulsification method using an electric field to generate droplets in a hydrodynamic-flow-focusing geometry in microchannels. The droplet size is controlled by the ratio of inner and outer flow rates as well as by the electric field. As the voltage increases, the droplet size decreases. A Taylor cone is formed and generates very fine droplets, less than 1 mu m in diameter. Small inner flow rates and high electric fields are required to form a stable Taylor cone in a dc electric field. An ac electric field produces tiny droplets periodically.
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http://nrs.harvard.edu/urn-3:HUL.InstRepos:41511263

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