Chemically modified field-effect transistors; a sodium ion selective sensor based on calix[4]arene receptor molecules

The development of an ion-sensitive field-effect transistor for sodium ions is described. Cahx[4]arene derivatives incorporated in a poly(vinyl chloride)-based membrane provide the selectivity. A poly(2-hydroxyethyl methacrylate) interlayer between the silicon dioxide gate and the sensing membrane i...

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Bibliographic Details
Published in:Analytica chimica acta 1991-11, Vol.254 (1), p.75-80
Main Authors: Brunink, Jos A.J., Haak, Jan R., Bomer, Johan G., Reinhoudt, David N., McKervey, M.Anthony, Harris, Stephen J.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Electrochemical methods
Exact sciences and technology
Ion-sensitive field-effect transistor
Potentiometry
Sodium
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Summary:The development of an ion-sensitive field-effect transistor for sodium ions is described. Cahx[4]arene derivatives incorporated in a poly(vinyl chloride)-based membrane provide the selectivity. A poly(2-hydroxyethyl methacrylate) interlayer between the silicon dioxide gate and the sensing membrane is necessary to obtain a Na +-sensitive ISFET with Nernstian behaviour. The potentiometric selectivity coefficients (log K i, j pot) for Na + over K + and Li + are −1.9 and −2.5, respectively.
ISSN:0003-2670
1873-4324
DOI:10.1016/0003-2670(91)90011-S