Controlling adhesion using AC electric fields across fluid films

Controlling adhesion using AC electric fields across fluid films

We demonstrate reversible and switchable actuation using AC electric fields to bring two surfaces separated by a thin film of ionic fluid in and out of adhesive contact. Using a surface force balance we apply electric fields normal to a crossed-cylinder contact and measure directly the adhesive forc...

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Veröffentlicht in:Journal of physics. Condensed matter 2021-08, Vol.33 (31), p.31
Hauptverfasser: Perez-Martinez, Carla S, Groves, Timothy S, Perkin, Susan
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Sprache:eng
Schlagworte:
adhesion
electric fields
ionic liquid
surface forces
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container_title Journal of physics. Condensed matter
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creator Perez-Martinez, Carla S
Groves, Timothy S
Perkin, Susan
description We demonstrate reversible and switchable actuation using AC electric fields to bring two surfaces separated by a thin film of ionic fluid in and out of adhesive contact. Using a surface force balance we apply electric fields normal to a crossed-cylinder contact and measure directly the adhesive force and surface separation with sub-molecular resolution. Taking advantage of the oscillatory structural force acting between the surfaces across the fluid, which we show to be unaffected by the AC field, we pick between the distinct (quantized) adhesive states through precise tuning of the field. This proof-of-concept indicates exquisite control of surface interactions using an external field.
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subjects adhesion
electric fields
ionic liquid
surface forces
title Controlling adhesion using AC electric fields across fluid films
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