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Issue 37, 2014
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Electrohydrodynamic removal of non-specific colloidal adsorption at electrode interfaces

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Abstract

This communication reports the use of an electrohydrodynamic surface shear force to selectively manipulate colloid–surface interactions. We demonstrate the selection of strongly (specifically) bound biomolecule-functionalized colloidal beads over more weakly (non-specifically) bound beads using a tuneable alternating current electrohydrodynamic (ac-EHD) force, which drives lateral fluid motion within a few nanometers of an electrode surface. By externally “tuning” the strength of the ac-EHD force, we demonstrate a significant enhancement of capture efficiency for specifically bound colloids, along with a removal of the adsorption of non-specific colloidal beads – a process which may be observed in real-time.

Graphical abstract: Electrohydrodynamic removal of non-specific colloidal adsorption at electrode interfaces

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Supplementary files

Article information


Submitted
21 Feb 2014
Accepted
05 Mar 2014
First published
05 Mar 2014

Chem. Commun., 2014,50, 4813-4815
Article type
Communication
Author version available

Electrohydrodynamic removal of non-specific colloidal adsorption at electrode interfaces

S. Rauf, M. J. A. Shiddiky and M. Trau, Chem. Commun., 2014, 50, 4813
DOI: 10.1039/C4CC01357C

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