A Novel Potentiometric Glucose Biosensor Based on Polyaniline Semiconductor Films
- 1 December 1994
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 27 (15) , 2871-2882
- https://doi.org/10.1080/00032719408000298
Abstract
Application of polyaniline semiconductor films to potentiometric biosensor development provides certain advantages comparing with the known systems. Using self-doped polyaniline instead of common polymer as pH transducer the stable potentiometric response of 70 mV/pH was obtained. Taking as an example glucose biosensor we showed that polyaniline based electrode possessed three-four fold increased potential shift than glucose-sensitive field-effect transistor did. One can increase the sensitivity of potentiometric biosensor using thick ion-exchange membranes (in our case Nafion) in order to concentrate product near electrode surface. Such sensor possessed higher response time.Keywords
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