Influence of plasticizer on the selectivity of nitrate-sensitive CHEMFETs


Stauthamer, W.P.R.V. and Engbersen, J.F.J. and Verboom, W. and Reinhoudt, D.N. (1994) Influence of plasticizer on the selectivity of nitrate-sensitive CHEMFETs. Sensors and Actuators B: Chemical, 17 (3). pp. 197-201. ISSN 0925-4005

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Abstract:By chemical modification of an ion-sensitive field-effect transistor, a sensor (CHEMFET) has been developed whose sensitivity for nitrate has been tested. A plasticized poly(vinyl chloride) (PVC) membrane, which contains lipophilic tetra-n-octyl-ammonium ions, is responsible for the nitrate sensitivity of the device. This membrane has been attached physically on top of a pH-buffered hydrogel, which itself has been attached covalently to the gate oxide of the field-effect transistor. The influence of the plasticizer in the PVC membrane on the selectivity pattern of the CHEMFET for the detection of nitrate has been investigated.
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Copyright:© 1994 Elsevier Science
Science and Technology (TNW)
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Metis ID: 106583