Electrohydrodynamic Removal of Non-Specific Colloidal Adsorption at Electrode Interfaces

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Author(s)
Rauf, Sakandar
Shiddiky, Muhammad JA
Trau, Matt
Griffith University Author(s)
Year published
2014
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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 ...
View more >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.
View less >
View more >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.
View less >
Journal Title
Chemical Communications
Volume
50
Issue
37
Copyright Statement
© 2014 Royal Society of Chemistry. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
Subject
Chemical sciences
Analytical chemistry not elsewhere classified