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

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Abstract

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.

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Publication details

The article was received on 15 Jan 2017, accepted on 19 Jan 2017 and first published on 19 Jan 2017


Article type: Paper
DOI: 10.1039/C7FD00016B
Citation: Faraday Discuss., 2017, Advance Article
  • Open access: Creative Commons BY license
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    Reversible ultralow-voltage liquid–liquid electrowetting without a dielectric layer

    N. E. A. Cousens and A. R. J. Kucernak, Faraday Discuss., 2017, Advance Article , DOI: 10.1039/C7FD00016B

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