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Permanent link (DOI): https://doi.org/10.7939/R31W38

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Electric Field Gradient and its Implications in Microfabricated Post Arrays Open Access

Descriptions

Other title
Subject/Keyword
Electrophoresis
Microfabricated Post Arrays
Dielectrophoresis
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Kazemlou, Shokoufeh
Supervisor and department
Nazemifard, Neda (Chemical and Materials Engineering)
Examining committee member and department
Thundat, Thomas (Chemical and Materials Engineering)
Zeng, Hongbo (Chemical and Materials Engineering)
Nazemifard, Neda (Chemical and Materials Engineering)
Yeung, Tony (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2013-01-30T13:58:11Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
The sources of inducing field gradients and their implications are investigated inside the microfabricated post arrays. A parametric study is conducted to understand how the posts arrangements, distance, and size change the field and field gradients. The results provide criteria where the assumption of a uniform field is valid, which can have important implications for designing microfluidic units. The DC dielectrophoretic and electrophoretic effects on the concentration of particles through the uniformly patterned arrays of posts are also evaluated. A mathematical model is solved by using a finite element scheme in order to evaluate the electrophoretic and dielectrophoretic forces exerted on the particles. The relative magnitude of these forces is presented as a measure for predicting the fate of the particles within the microfabricated array structures. The results provide an insight into the governing particle transport mechanisms in a micro scale environment in the presence of externally applied electric fields.
Language
English
DOI
doi:10.7939/R31W38
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File author: Shokufeh Kazemlou
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