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- Title
Mathematical analysis of effects on the electrostatic double layer of nanoscale surfaces in microfluidic channels.
- Authors
Aston, D. E.; Berven, C. A.; Williams, B. C.; Basu, A.
- Abstract
The effects of microfluidics on the electrostatic double layer (EDL) of a nano-structured electrode are investigated through numerical modelling. The parameters of interest are the height and spacing of nanostructures, specifically, nanowire and 'nanopillar' pairs rising from an idealised sensor substrate perpendicular to the fluid flow. A direct comparison of the EDL thicknesses at the peaks and valleys of this nanostructure are reported for variations in fluid velocity, nanowire spacing, and height under fixed conditions of combined pressure-driven and electro-osmotic driving forces. In a microchannel based on the Navier-Stokes and Helmholtz-Smoluchoswki flow models, numerical simulations provide insight into the practical design of chemically selective nanomaterial electrodes for potentiometric detection of ions in water.
- Subjects
MICROFLUIDICS; ELECTROSTATICS; NANOSTRUCTURED materials; ELECTRODES; MATHEMATICAL models; NAVIER-Stokes equations; SIMULATION methods &; models
- Publication
Canadian Journal of Chemical Engineering, 2012, Vol 90, Issue 4, p1059
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.20475