Durability of phosphate-selective CHEMFETs

Wojciech Wroblewski, Kamil Wojciechowski, Artur Dybko, Zbigniew Brzozka, Richard J.M. Egberink, Bianca H.M. Ruel, David Reinhoudt

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    Abstract

    Lipophilic uranyl salophenes derivatives I and II were used as ionophores in membranes of phosphate-selective CHEMFETs. High selectivity for H2PO4− over other anions was obtained for these sensors. The influence of the ionophore structure on the sensor durability was investigated. CHEMFETs based on derivative II exhibited better long-term stability due to the better solvation of this ionophore in the membrane phase. The microsensor durability can be improved decreasing the amount of the ammonium salt in the membrane to 5% mol, with only little decrease of initial selectivity.
    Original languageUndefined
    Pages (from-to)315-319
    JournalSensors and actuators. B: Chemical
    Volume75
    Issue number1-3
    DOIs
    Publication statusPublished - 2001

    Keywords

    • CHEMFETs
    • Phosphate selectivity
    • METIS-202977
    • IR-36755
    • Uranyl salophenes

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