Multi-ion sensing device for horticultural application based upon chemical modification and special packaging of ISFETs

Vlekkert van den, H.H. and Verkerk, U.H. and Wal van der, P.D. and Wingerden van, A. and Reinhoudt, D.N. and Haak, J.R. and Honig, G.W.N. and Holterman, H.A.J. (1992) Multi-ion sensing device for horticultural application based upon chemical modification and special packaging of ISFETs. Sensors and Actuators B: Chemical, 6 (1-3). pp. 34-37. ISSN 0925-4005

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Abstract:	A multi-ion sensing device, based on ISFETs, is described for horticultural applications. The advantages of a new packaging technique based on back-side contacted ISFETs are outlined. The basic pH-sensitive ISFETs can be modified to, e.g., potassium-sensitive devices by using neutral carrier-based membranes and an intermediate hydrogel. Both membrane and hydrogel are chemically anchored to the ISFET surface and the ionophore is chemically bonded to the membrane. It is shown that these chemical modifications of the membrane system lead to an increased lifetime for the sensor.
Item Type:	Article
Copyright:	© 1992 Elsevier Science
Research Group:	Supramolecular Chemistry and Technology (SMCT)
Link to this item:	http://purl.utwente.nl/publications/12601
Official URL:	http://dx.doi.org/10.1016/0925-4005(92)80027-U
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