Research Output
Microstructural, Impedance Spectroscopic and Potentiometric Analysis of Ta₂O₅ Electrochemical Thick Film pH Sensors
  Two types of pH sensors based on Ta2O5 thick films, interdigitated conductimetric and potentiometric ones, were screen printed on an alumina substrate. Their properties were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, electrochemical impedance spectroscopy and potentiometry. The impedance spectroscopic studies of the fabricated thick film sensors were carried out in the frequency range of 10 Hz–2 MHz in test solutions of pH 3–12. The conductance, capacitance and impedance of the fabricated conductimetric Ta2O5 sensor were found to be distinctly pH-dependent at low frequencies. For potentiometric sensors, a sub-Nernstian behavior was obtained.

  • Type:

    Article

  • Date:

    06 February 2015

  • Publication Status:

    Published

  • Publisher

    Wiley

  • DOI:

    10.1002/elan.201400571

  • Cross Ref:

    10.1002/elan.201400571

  • ISSN:

    1040-0397

  • Funders:

    European Commission

Citation

Manjakkal, L., Cvejin, K., Bajac, B., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2015). Microstructural, Impedance Spectroscopic and Potentiometric Analysis of Ta₂O₅ Electrochemical Thick Film pH Sensors. Electroanalysis, 27(3), 770-781. https://doi.org/10.1002/elan.201400571

Authors

Keywords

Electrochemistry; Analytical Chemistry

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