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Issue 3, 2011
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EWOD driven cleaning of bioparticles on hydrophobic and superhydrophobic surfaces

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Abstract

Environmental air monitoring is of great interest due to the large number of people concerned and exposed to different possible risks. From the most common particles in our environment (e.g. by-products of combustion or pollens) to more specific and dangerous agents (e.g. pathogenic micro-organisms), there are a large range of particles that need to be controlled. In this article we propose an original study on the collection of electrostatically deposited particles using electrowetting droplet displacement. A variety of particles were studied, from synthetic particles (e.g. Polystyrene Latex (PSL) microsphere) to different classes of biological particle (proteins, bacterial spores and a viral simulant). Furthermore, we have compared ElectroWetting-On-Dielectric (EWOD) collecting efficiency using either a hydrophobic or a superhydrophobic counter electrode. We observe different cleaning efficiencies, depending on the hydrophobicity of the substrate (varying from 45% to 99%). Superhydrophobic surfaces show the best cleaning efficiency with water droplets for all investigated particles (MS2 bacteriophage, BG (Bacillus atrophaeus) spores, OA (ovalbumin) proteins, and PSL).

Graphical abstract: EWOD driven cleaning of bioparticles on hydrophobic and superhydrophobic surfaces

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Article information


Submitted
15 Jul 2010
Accepted
13 Oct 2010
First published
22 Nov 2010

Lab Chip, 2011,11, 490-496
Article type
Paper

EWOD driven cleaning of bioparticles on hydrophobic and superhydrophobic surfaces

M. Jönsson-Niedziółka, F. Lapierre, Y. Coffinier, S. J. Parry, F. Zoueshtiagh, T. Foat, V. Thomy and R. Boukherroub, Lab Chip, 2011, 11, 490
DOI: 10.1039/C0LC00203H

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