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Multi-step dielectrophoresis for separation of particles
KTH.
KTH.
KTH.
2006 (English)In: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1131, no 1-2, 261-266 p.Article in journal (Refereed) Published
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Text
Abstract [en]

A new concept for separation of particles based on repetitive dielectrophoretic trapping and release in a flow system is proposed. Calculations using the finite element method have been performed to envision the particle behavior and the separation effectiveness of the proposed method. As a model system, polystyrene beads in deionized water and a micro-flow channel with arrays of interdigited electrodes have been used. Results show that the resolution increases as a direct function of the number of trap-and-release steps, and that a difference in size will have a larger influence on the separation than a difference in other dielectrophoretic properties. About 200 trap-and-release steps would be required to separate particles with a size difference of 0.2%. The enhanced separation power of dielectrophoresis with multiple steps could be of great importance, not only for fractionation of particles with small differences in size, but also for measuring changes in surface conductivity, or for separations based on combinations of difference in size and dielectric properties.

Place, publisher, year, edition, pages
2006. Vol. 1131, no 1-2, 261-266 p.
Keyword [en]
dielectrophoresis; dielectrophoretic mobility; resolution; selectivity; particle separation
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:sh:diva-30098DOI: 10.1016/j.chroma.2006.07.022ISI: 000241429000027Scopus ID: 2-s2.0-33749267590OAI: oai:DiVA.org:sh-30098DiVA: diva2:939569
Available from: 2008-06-02 Created: 2016-06-01 Last updated: 2016-06-20Bibliographically approved

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Citation style
  • apa
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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  • text
  • asciidoc
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