Iman Frozanpoor
Continuous Droplet-Actuating Platforms via an Electric Field Gradient: Electrowetting and Liquid Dielectrophoresis
Frozanpoor, Iman; Cooke, Michael. D.; Ambukan, Vibin; Gallant, Andrew. J.; Balocco, Claudio
Authors
Dr Michael Cooke michael.cooke@durham.ac.uk
Senior Experimental Officer
Vibin Ambukan
Professor Andrew Gallant a.j.gallant@durham.ac.uk
Professor
Professor Claudio Balocco claudio.balocco@durham.ac.uk
Professor
Abstract
This work develops a technology for actuating droplets of any size without the requirement for high voltages or active control systems, which are typically found in competitive systems. The droplet actuation relies on two microelectrodes separated by a variable gap distance to generate an electrostatic gradient. The physical mechanism for the droplet motion is a combination of liquid dielectrophoresis and electrowetting. Investigating the system behavior as a function of the driving frequency identified the relative contribution of these two mechanisms and the optimum operating conditions. A fixed signal frequency of 0.5 kHz actuated various liquids and contaminants. Droplet actuation was demonstrated on several platforms, including linear, radial-symmetric, and bilateral-symmetric droplet motion. The electrode designs are scalable and can be fabricated on a flexible and optically transparent substrate: these key advancements will enable consumer applications that were previously inaccessible. A self-cleaning platform was also tested under laboratory conditions and on the road. This technology has significant potential in microfluidics and self-cleaning platforms, for example, in the automotive sector to clean body parts, camera covers, and sensors.
Citation
Frozanpoor, I., Cooke, M. D., Ambukan, V., Gallant, A. J., & Balocco, C. (2021). Continuous Droplet-Actuating Platforms via an Electric Field Gradient: Electrowetting and Liquid Dielectrophoresis. Langmuir, 37(21), 6414-6422. https://doi.org/10.1021/acs.langmuir.1c00329
Journal Article Type | Article |
---|---|
Online Publication Date | May 20, 2021 |
Publication Date | Jun 1, 2021 |
Deposit Date | Jun 17, 2021 |
Publicly Available Date | Jun 17, 2021 |
Journal | Langmuir |
Print ISSN | 0743-7463 |
Electronic ISSN | 1520-5827 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 37 |
Issue | 21 |
Pages | 6414-6422 |
DOI | https://doi.org/10.1021/acs.langmuir.1c00329 |
Public URL | https://durham-repository.worktribe.com/output/1246982 |
Files
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
© 2021 The Authors. Published by American Chemical Society
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