Keywords

electrowetting, floating electrode, silicon dioxide, droplet charging, electrowetting grounding, memory droplet

Abstract

Floating electrode electrowetting is caused by dc voltage applied to a liquid droplet on the Cytop surface, without electrical connection to the substrate. The effect is caused by the charge separation in the floating electrode. A highly-resistive thermally-grown SiO2 layer underneath the Cytop enables the droplet to hold charges without leakage, which is the key contribution. Electrowetting with an SiO2 layer shows a memory effect, where the wetting angle stays the same after the auxiliary electrode is removed from the droplet in both conventional and floating electrode electrowetting. Floating electrode electrowetting provides an alternative configuration for developing advanced electrowetting-based devices.

Original Publication Citation

M. Khodayari, B. Hahne, N. B. Crane, A. A. Volinsky (5/15/13). Floating electrode electrowetting on hydrophobic dielectric with an SiO2 layer. Applied Physics Letters, Vol 102 (May 13 2013), n 19 p 192907:1-3, DOI 10.1063/1.4807018.

Document Type

Peer-Reviewed Article

Publication Date

2013-05-13

Publisher

Applied Physics Letters

Language

English

College

Ira A. Fulton College of Engineering and Technology

Department

Mechanical Engineering

University Standing at Time of Publication

Full Professor

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