Coplanar Electrode Layout Optimized for Increased Sensitivity for Electrical Impedance Spectroscopy

Casper Hyttel Clausen, Gustav Erik Skands, Christian Vinther Bertelsen, Winnie Edith Svendsen

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    Abstract

    This work describes an improvement in the layout of coplanar electrodes for electrical impedance spectroscopy. We have developed, fabricated, and tested an improved electrode layout, which improves the sensitivity of an impedance flow cytometry chip. The improved chip was experimentally tested and compared to a chip with a conventional electrode layout. The improved chip was able to discriminate 0.5 mu m beads from 1 mu m as opposed to the conventional chip. Furthermore, finite element modeling was used to simulate the improvements in electrical field density and uniformity between the electrodes of the new electrode layout. Good agreement was observed between the model and the obtained experimental results.
    Original languageEnglish
    JournalMicromachines
    Volume6
    Issue number1
    Pages (from-to)110-120
    Number of pages11
    ISSN2072-666X
    DOIs
    Publication statusPublished - 2015

    Bibliographical note

    Creative Commons Attribution License

    Keywords

    • Electrical impedance spectroscopy
    • Sensitivity
    • Improved design
    • Impedance flow cytometry

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