Hydrogen-selective microelectrodes based on silicon needles

Nadia Zine, Joan Bausells, Antoni Ivorra, Jordi Aguiló, Miguel Zabala, Francesc Teixidor, Carles Masalles, Clara Viñas, Abdelhamid Errachid*

*Corresponding author for this work

    Research output: Contribution to journalArticleResearchpeer-review

    41 Citations (Scopus)


    The fabrication of hydrogen-selective microelectrodes on silicon needle-shaped substrates is described. The microelectrodes are based on an ion-selective poly(vinyl chloride) (PVC) membrane with an intrinsically conducting polymer (polypyrrole (PPy)) solid contact layer. The polypyrrole is prepared with the dopant anion cobaltbis(dicarbollide) [3,3′-Co(1,2-C2B9H11)2]- , which gives a high stability to the polymer layer. The performance of the resulting solid-contact ion-selective microelectrodes (SCISME) is investigated by using potentiometric measurement and electrochemical impedance spectrometry. The feasibility of the fabrication technology is demonstrated and the devices operate satisfactorily, with a response showing good sensitivity and selectivity against common interfering cations in background solutions. The SCISME has been developed for organ monitoring during cardiac surgery or during transportation for transplants.

    Original languageEnglish
    Pages (from-to)76-82
    Number of pages7
    JournalSensors and Actuators, B: Chemical
    Issue number1-3
    Publication statusPublished - 1 Jun 2003


    • Conducting organic polymer
    • pH microelectrode
    • Polypyrrole
    • Silicon needle
    • Solid-state ion-selective microelectrode


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