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Switchable Electrohydrodynamic Capillary Bridges

preprint
submitted on 10.12.2020, 16:37 and posted on 11.12.2020, 12:43 by Tianxing Ma, Darrel Dsouza, Matthew Signorelli, Krysten Ryerson, Michael Loewenberg, Chinedum Osuji, Jonathan Singer

The deformation of sessile droplets and capillary bridging in a parallel-plate capacitor under DC fields has been the subject of several scientific studies. Coaxially located droplets on opposing electrodes experience an attraction in the presence of an electric field. Application of a suitably large field will lead to either the droplets forming a liquid bridge or oscillation between bridged and de-bridged (i.e. droplet) states. We explored the bridging behavior of a variety of liquids in air. Among the liquids and droplet geometries that could form a stable field-induced bridge, only a limited set could reversibly make and break the capillary bridge by switching the electric field on and off. The ability to form a switchable liquid bridge is a function of both the liquid’s properties, including surface tension, electric conductivity, and dielectric constant, and external conditions such as electrode separation, droplet volume.

Funding

Department of Energy, EERE Advanced Manufacturing Office, DE-EE0008314

History

Email Address of Submitting Author

jonathan.singer@rutgers.edu

Institution

Rutgers University

Country

United State

ORCID For Submitting Author

0000-0002-5934-8795

Declaration of Conflict of Interest

No conflict of interest.

Exports

ChemRxiv

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