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- W2082764054 abstract "The wetting angle of a liquid droplet on a dielectric substrate can be tuned by an applied electric field. Recent experiments revealed an intriguing phenomenon where the contact line between a droplet and a substrate may lose stability under a relatively large field, leading to the ejection of small droplets from the edge of the mother droplet. While this behavior may pose a limit on the achievable wetting angle, it also provides an interesting approach to produce patterns of tiny droplets. We propose a phase field model to explain the mechanism, which combines thermodynamics and convective viscous flow. Our study suggests that instability is preceded by a contact angle reduction and extrusion of a thin layer from the edge of the droplet. While instability appears when the electric field is above a critical value, it can be suppressed with increased surface energy of the droplet." @default.
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- W2082764054 date "2011-02-01" @default.
- W2082764054 modified "2023-10-14" @default.
- W2082764054 title "Instability of electrowetting on a dielectric substrate" @default.
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- W2082764054 doi "https://doi.org/10.1063/1.3544460" @default.
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