Electrochemical principles for active control of liquids on submillimeter scales
Date
1999
Authors
Gallardo, Benedict S.
Gupta, Vinay K.
Eagerton, Franklin D.
Jong, Lana I.
Craig, Vincent
Shah, Rahul
Abbott, Nicholas L.
Journal Title
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Volume Title
Publisher
American Association for the Advancement of Science
Abstract
Electrochemical methods were combined with redox-active surfactants to actively control the motions and positions of aqueous and organic liquids on millimeter and smaller scales. Surfactant species generated at one electrode and consumed at another were used to manipulate the magnitude and direction of spatial gradients in surface tension and guide droplets of organic liquids through simple fluidic networks. Solid microparticles could be transported across unconfined surfaces. Electrochemical control of the position of surface-active species within aqueous films of liquid supported on homogeneous surfaces was used to direct these films into periodic arrays of droplets with deterministic shapes and sizes.
Description
Keywords
Keywords: Drop formation; Electrochemical electrodes; Electrochemistry; Films; Flow of fluids; Molecules; Osmosis; Redox reactions; Solids; Surface active agents; Surface tension; Surfaces; Active control; Aqueous films; Organic liquids; Osmotic swelling; Solid mic
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Source
Science
Type
Journal article
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Restricted until
2037-12-31