Fluid Mixing for Low‐Power ‘Digital Microfluidics’ Using Electroactive Molecular Monolayers

A switchable electrode, which relies on an indium‐tin oxide conductive substrate coated with a self‐assembled monolayer terminated with an anthraquinone group (AQ), is reported as an electrowetting system. AQ electrochemical features confer the capability of yielding a significant modulation of surf...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Vol. 14; no. 10
Main Authors: Maglione, Maria Serena, Casalini, Stefano, Georgakopoulos, Stamatis, Barbalinardo, Marianna, Parkula, Vitaliy, Crivillers, Núria, Rovira, Concepció, Greco, Pierpaolo, Mas‐Torrent, Marta
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 01.03.2018
Subjects:
Actuation
Coated electrodes
Dispensing
electroactive molecule
electrowetting
Microfluidics
Monolayers
Nanotechnology
quinone
self‐assembled monolayer
Substrates
Tin oxides
Wettability
electrowetting
electroactive molecule
microfluidics
self-assembled monolayer
quinone
ISSN:1613-6810, 1613-6829, 1613-6829
Online Access:Get full text
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Summary:A switchable electrode, which relies on an indium‐tin oxide conductive substrate coated with a self‐assembled monolayer terminated with an anthraquinone group (AQ), is reported as an electrowetting system. AQ electrochemical features confer the capability of yielding a significant modulation of surface wettability as high as 26° when its redox state is switched. Hence, an array of planar electrodes for droplets actuation is fabricated and integrated in a microfluidic device to perform mixing and dispensing on sub‐nanoliter scale. Vehiculation of cells across microfluidic compartments is made possible by taking full advantage of surface electrowetting in culture medium. An array of planar indium‐tin oxide electrodes for droplets actuation based on a self‐assembled monolayer terminated with a switchable electroactive anthraquinone group is fabricated. The electrodes are integrated in a microfluidic device to perform mixing and dispensing at sub‐nanoliter scale. Vehiculation of cells across microfluidic compartments is further demonstrated.
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ISSN:1613-6810
1613-6829
1613-6829
DOI:10.1002/smll.201703344