Reversible ultralow-voltage liquid-liquid electrowetting without a dielectric layer

Electrowetting-on-dielectric devices typically have operating voltages of 10-20 V. A reduction in the operating voltage could greatly reduce the energy consumption of these devices. Herein, fully reversible one-electrolyte electrowetting of a droplet on a solid metal surface is reported for the firs...

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Bibliographic Details
Published in:Faraday discussions 2017-07, Vol.199, p.63-73
Main Authors: Cousens, Nico E A, Kucernak, Anthony R J
Format: Article
Language:English
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Summary:Electrowetting-on-dielectric devices typically have operating voltages of 10-20 V. A reduction in the operating voltage could greatly reduce the energy consumption of these devices. Herein, fully reversible one-electrolyte electrowetting of a droplet on a solid metal surface is reported for the first time. A reversible change of 29° for an 800 mV step is achieved. The effects of surface roughness, electrolyte composition, electrolyte concentration and droplet composition are investigated. It was found that there is a dramatic dependence of the reversibility and hysteresis of the system on these parameters, contrary to theoretical predictions. When a 3-chloro-1-propanol droplet is used, a system with no hysteresis and a 40° change in angle are obtained.
ISSN:1359-6640
1364-5498
DOI:10.1039/C7FD00016B