Cover Image

Factors affecting particle collection by electro-osmosis in microfluidic systems

Alternating-current electro-osmosis, a phenomenon of fluid transport due to the interaction between an electrical double layer and a tangential electric field, has been used both for inducing fluid movement and for the concentration of particles suspended in the fluid. This offers many advantages ov...

Full description

Saved in:
Bibliographic Details
Main Authors: Mohtar, Mohd Nazim, Hoettges, Kai Friedrich, Hughes, Michael Pycraft
Format: Article
Language:English
Published: Wiley-VCH Verlag 2014
Online Access:http://psasir.upm.edu.my/id/eprint/37617/1/Factors%20affecting%20particle%20collection%20by%20electro-osmosis%20in%20microfluidic%20systems.pdf
http://psasir.upm.edu.my/id/eprint/37617/
http://onlinelibrary.wiley.com/doi/10.1002/elps.201300420/abstract;jsessionid=43A6F813DF707244EA4FA364CE53E6B5.f02t04
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.37617
record_format eprints
spelling my.upm.eprints.376172016-01-12T07:42:22Z http://psasir.upm.edu.my/id/eprint/37617/ Factors affecting particle collection by electro-osmosis in microfluidic systems Mohtar, Mohd Nazim Hoettges, Kai Friedrich Hughes, Michael Pycraft Alternating-current electro-osmosis, a phenomenon of fluid transport due to the interaction between an electrical double layer and a tangential electric field, has been used both for inducing fluid movement and for the concentration of particles suspended in the fluid. This offers many advantages over other phenomena used to trap particles, such as placing particles at an electrode centre rather than an edge; benefits of scale, where electrodes hundreds of micrometers across can trap particles from the molecules to cells at the same rate; and a trapping volume limited by the vortex height, a phenomenon thus far unstudied. In this paper, the collection of particles due to alternating-current electro-osmosis driven collection is examined for a range of particle concentrations, inter-electrode gap widths, chamber heights and media viscosity and density. A model of collection behaviour is described where particle collection over time is governed by two processes, one driven by the vortices and the other by sedimentation, allowing the determination of the maximum height of vortex-driven collection, but also indicates how trapping is limited by high particle concentrations and fluid velocities. The results also indicate that viscosity, rather than density, is a significant governing factor in determining the trapping behaviour of particles. Wiley-VCH Verlag 2014-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/37617/1/Factors%20affecting%20particle%20collection%20by%20electro-osmosis%20in%20microfluidic%20systems.pdf Mohtar, Mohd Nazim and Hoettges, Kai Friedrich and Hughes, Michael Pycraft (2014) Factors affecting particle collection by electro-osmosis in microfluidic systems. Electrophoresis, 35 (2-3). pp. 345-351. ISSN 0173-0835; ESSN: 1522-2683 http://onlinelibrary.wiley.com/doi/10.1002/elps.201300420/abstract;jsessionid=43A6F813DF707244EA4FA364CE53E6B5.f02t04 10.1002/elps.201300420
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Alternating-current electro-osmosis, a phenomenon of fluid transport due to the interaction between an electrical double layer and a tangential electric field, has been used both for inducing fluid movement and for the concentration of particles suspended in the fluid. This offers many advantages over other phenomena used to trap particles, such as placing particles at an electrode centre rather than an edge; benefits of scale, where electrodes hundreds of micrometers across can trap particles from the molecules to cells at the same rate; and a trapping volume limited by the vortex height, a phenomenon thus far unstudied. In this paper, the collection of particles due to alternating-current electro-osmosis driven collection is examined for a range of particle concentrations, inter-electrode gap widths, chamber heights and media viscosity and density. A model of collection behaviour is described where particle collection over time is governed by two processes, one driven by the vortices and the other by sedimentation, allowing the determination of the maximum height of vortex-driven collection, but also indicates how trapping is limited by high particle concentrations and fluid velocities. The results also indicate that viscosity, rather than density, is a significant governing factor in determining the trapping behaviour of particles.
format Article
author Mohtar, Mohd Nazim
Hoettges, Kai Friedrich
Hughes, Michael Pycraft
spellingShingle Mohtar, Mohd Nazim
Hoettges, Kai Friedrich
Hughes, Michael Pycraft
Factors affecting particle collection by electro-osmosis in microfluidic systems
author_facet Mohtar, Mohd Nazim
Hoettges, Kai Friedrich
Hughes, Michael Pycraft
author_sort Mohtar, Mohd Nazim
title Factors affecting particle collection by electro-osmosis in microfluidic systems
title_short Factors affecting particle collection by electro-osmosis in microfluidic systems
title_full Factors affecting particle collection by electro-osmosis in microfluidic systems
title_fullStr Factors affecting particle collection by electro-osmosis in microfluidic systems
title_full_unstemmed Factors affecting particle collection by electro-osmosis in microfluidic systems
title_sort factors affecting particle collection by electro-osmosis in microfluidic systems
publisher Wiley-VCH Verlag
publishDate 2014
url http://psasir.upm.edu.my/id/eprint/37617/1/Factors%20affecting%20particle%20collection%20by%20electro-osmosis%20in%20microfluidic%20systems.pdf
http://psasir.upm.edu.my/id/eprint/37617/
http://onlinelibrary.wiley.com/doi/10.1002/elps.201300420/abstract;jsessionid=43A6F813DF707244EA4FA364CE53E6B5.f02t04
_version_ 1643832025572966400
score 13.211869

Similar Items