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Electrochemical Impedance Spectroscopy in the Characterisation and Application of Modified Electrodes for Electrochemical Sensors and Biosensors

Molecules (Basel, Switzerland), 2022-02, Vol.27 (5), p.1497 [Peer Reviewed Journal]

2022 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2022 by the author. 2022 ;ISSN: 1420-3049 ;EISSN: 1420-3049 ;DOI: 10.3390/molecules27051497 ;PMID: 35268599

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  • Title:
    Electrochemical Impedance Spectroscopy in the Characterisation and Application of Modified Electrodes for Electrochemical Sensors and Biosensors
  • Author: Brett, Christopher M A
  • Subjects: Biosensors ; Charge transfer ; charge transfer resistance ; Chemical sensors ; Circuits ; constant phase element ; Dielectric Spectroscopy ; Electrochemical impedance spectroscopy ; Electrochemistry ; Electrodes ; Equivalent circuits ; Experiments ; Impedance ; Microscopy ; Modelling ; modified electrodes ; Review ; Sensors ; sensors and biosensors ; Spectroscopy ; Spectrum analysis ; Voltammetry ; Warburg impedance
  • Is Part Of: Molecules (Basel, Switzerland), 2022-02, Vol.27 (5), p.1497
  • Description: Electrochemical impedance spectroscopy is finding increasing use in electrochemical sensors and biosensors, both in their characterisation, including during successive phases of sensor construction, and in application as a quantitative determination technique. Much of the published work continues to make little use of all the information that can be furnished by full physical modelling and analysis of the impedance spectra, and thus does not throw more than a superficial light on the processes occurring. Analysis is often restricted to estimating values of charge transfer resistances without interpretation and ignoring other electrical equivalent circuit components. In this article, the important basics of electrochemical impedance for electrochemical sensors and biosensors are presented, focussing on the necessary electrical circuit elements. This is followed by examples of its use in characterisation and in electroanalytical applications, at the same time demonstrating how fuller use can be made of the information obtained from complete modelling and analysis of the data in the spectra, the values of the circuit components and their physical meaning. The future outlook for electrochemical impedance in the sensing field is discussed.
  • Publisher: Switzerland: MDPI AG
  • Language: English
  • Identifier: ISSN: 1420-3049
    EISSN: 1420-3049
    DOI: 10.3390/molecules27051497
    PMID: 35268599
  • Source: GFMER Free Medical Journals
    MEDLINE
    PubMed Central
    Alma/SFX Local Collection
    ProQuest Central
    DOAJ Directory of Open Access Journals
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