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[Conference] Droplet manipulations by dielectrowetting: Creating, transporting, splitting, and mergi


This paper presents four droplet operations (creating, transporting, splitting and merging of droplets) actuated by dielectrowetting (not electrowetting), which fundamentally constitute a backbone of droplet-based digital microfluidics. These operations are successfully achieved for both non-conductive (dielectric) and conductive (DI water with/without surfactant) fluids in an open environment on a single plate. All these features are attributed to the dielectrowetting nature of superspreading. By contrast, electrowetting works only with conductive fluids, commonly in the two-plate (hundreds microns gap) channel environment. Particularly, splitting and creating by electrowetting have never been realized on a single plate. As for the present device, these successful operations significantly enhance digital microfluidics to work for a wide range of fluids, to simplify the required physical structures, and to increase the handing fluid volumes (otherwise limited by the two-plate gap).

Published in: Micro Electro Mechanical Systems (MEMS), 2017 IEEE 30th International Conference on MEMS

Date of Conference: 22-26 Jan. 2017

Date Added to IEEE Xplore: 28 February 2017

DOI: 10.1109/MEMSYS.2017.7863353

Hongyao Geng

University of Pittsburgh, Pittsburgh, USA

Jian Feng

University of Pittsburgh, Pittsburgh, USA

Lisa Marie Stabryla

University of Pittsburgh, Pittsburgh, USA

Sung Kwon Cho

University of Pittsburgh, Pittsburgh, USA

Link: http://ieeexplore.ieee.org/abstract/document/7863353/

#dropbasedmicrofluidics #dielectrowetting #digitalmicrofluidics #DigitalMicrofluidics #MEMS

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