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Superpositioned dielectrophoresis for enhanced trapping efficiency
KTH.
KTH.
KTH.
2005 (English)In: Electrophoresis, ISSN 0173-0835, E-ISSN 1522-2683, Vol. 26, no 22, 4252-4259 p.Article in journal (Refereed) Published
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Text
Abstract [en]

One of the major applications for dielectrophoresis is selective trapping and fractionation of particles. If the surrounding medium is of low conductivity, the trapping force is high, but if the conductivity increases, the attraction decreases and may even become negative. However, high-conductivity media are essential when working with biological material such as living cells. In this paper, some basic calculations have been performed, and a model has been developed which employs both positive and negative dielectrophoresis in a channel with interdigitated electrodes. The finite element method was utilized to predict the trajectories of Escherichia coli bacteria in the superpositioned electrical fields. It is shown that a drastic improvement of trapping efficiency can be obtained in this way, when a high conductivity medium is employed.

Place, publisher, year, edition, pages
2005. Vol. 26, no 22, 4252-4259 p.
Keyword [en]
alternating current electrokinetics; dielectrophoresis; Escherichia coli; field superposition; trajectory analysis
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:sh:diva-30099DOI: 10.1002/elps.200500068ISI: 000233740900003Scopus ID: 2-s2.0-28244475356OAI: oai:DiVA.org:sh-30099DiVA: diva2:939707
Available from: 2006-03-22 Created: 2016-06-01 Last updated: 2016-06-20Bibliographically approved

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