Impedance spectra analysis to characterize interdigitated electrodes as electrochemical sensors

Sunil Rana*, Robin H. Page, Calum J. McNeil

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

24 Citations (Scopus)

Abstract

Interdigitated electrode (IDE) arrays have been used widely for electrochemical impedance spectroscopy (EIS). Here, we present an in-depth analysis of interdigitated electrode impedance spectra. Such an analysis is necessary for the identification of the contribution of each interdigitated electrode circuit element to the impedance change. We also discuss the importance of the solution conductivity in impedance spectroscopy showing that the use of low conductivity solutions is advantageous when inter-digit solution resistance and geometric capacitance need to be monitored.

Original languageEnglish
Pages (from-to)8559-8563
Number of pages5
JournalElectrochimica Acta
Volume56
Issue number24
DOIs
Publication statusPublished - 1 Oct 2011

Keywords

  • Electrochemical impedance spectroscopy
  • Geometric capacitance
  • Interdigitated electrodes
  • Solution conductivity
  • Solution resistance

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