Polysiloxane based CHEMFETs for selective detection of Ca2+ ions

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Abstract

Different siloxane copolymers have been used as membrane materials for Ca2+ selective chemically modified field effect transistors (CHEMFETs). CHEMFETs with 3-benzoylaminopropyl-functionalized polysiloxane membranes and 1 wt% borate anions are intrinsically selective for Ca2+ ions. This selectivity can be further enhanced by the incorporation of a Ca2+ selective 1,3 alternate calix[4]arene which is functionalized with four amido groups. The highest Ca2+ selectivities were obtained with CHEMFETs containing this calix[4]arene ionophore in 3-cyanopropyl-functionalized polysiloxane membranes.

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Lugtenberg, R. J. W., Egberink, R. J. M., Engbersen, J. F. J., & Reinhoudt, D. N. (1997). Polysiloxane based CHEMFETs for selective detection of Ca2+ ions. Analytica Chimica Acta, 357(3), 225–229. https://doi.org/10.1016/S0003-2670(97)00571-0

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