Comparison of Planar and 3-D Interdigitated Electrodes as Electrochemical Impedance Biosensors

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  2. Dr Sunilkumar Rana
  3. Dr Robin Page
  4. Professor Calum McNeil
Author(s)Rana S, Page RH, McNeil CJ
Publication type Article
JournalElectroanalysis
Year2011
Volume23
Issue10
Pages2485-2490
ISSN (print)1040-0397
ISSN (electronic)1521-4109
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It has been reported that the introduction of a dielectric barrier between adjacent digits of an interdigitated electrode array can improve the sensitivity of the array as an electrochemical impedance biosensor. Here we present an in-depth analysis of the impedance in planar interdigitated electrodes and 3-D interdigitated electrodes (with dielectric barriers). The analysis indicates that the planar geometry not only provides lower impedance but also a higher change impedance as a result of molecular immobilization on the electrode array surface.
PublisherWiley - V C H Verlag GmbH & Co. KGaA
URLhttp://dx.doi.org/10.1002/elan.201100353
DOI10.1002/elan.201100353
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