Chemically modified field effect transistors: the effect of ion-pair association on the membrane potentials

Cobben, Peter L.H.M. and Egberink, Richard J.M. and Bomer, Johan G. and Bergveld, Piet and Reinhoudt, David N. (1994) Chemically modified field effect transistors: the effect of ion-pair association on the membrane potentials. Journal of Electroanalytical Chemistry, 368 (1-2). pp. 193-208. ISSN 1572-6657

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Abstract:	A theoretical model has been developed which relates physically accessible parameters to the formation of a membrane potential. The description is an extension of a theoretical description presented previously by our group, now including divalent cations and ion-pair association. Simulations of the overall membrane potential reveal several factors that may lead to non-Nernstian response curves. For monovalent and divalent cations a reduction in the slope of the response curve (sub-Nernstian response) should virtually always be expected when ion-pair association takes place in the membrane. Ion-pair association of divalent cations and sample anions can lead to a super-Nernstian response. A diffusion potential generally reduces the Nernstian slope of the response curve. In addition, several experimental results are described which illustrate and confirm our theoretical model.
Item Type:	Article
Copyright:	© 1994 Elsevier Science
Research Group:	Supramolecular Chemistry and Technology (SMCT) Biomedical and Environmental Sensor systems (BIOS)
Link to this item:	http://purl.utwente.nl/publications/15069
Official URL:	http://dx.doi.org/10.1016/0022-0728(93)03114-5
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