Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 106, Issue 1, Pages 289-295Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2004.08.011
Keywords
biosensors; glucose; amperometric; polypyrrole; PEDOT
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The stability of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(pyrrole) was investigated as the electroactive component in amperometric biosensors. PEDOT and poly(pyrrole) were synthesized chemically inside the pores of a track-etch membrane by immersing the membrane into a solution of the corresponding monomer and ferric chloride. This paper reports the detailed results on the stability of poly(pyrrole)- and PEDOT-coated track-etch membranes under physiological relevant conditions by means of amperometric and resistance measurements. FT-IR spectroscopy, ESR spectroscopy and scanning electron microscopy. The experiments demonstrated that poly(pyrrole) could only be used as an electroactive component in (bio)sensing for a very short period of time. In poly(3,4-ethylenedioxythiophene) an attractive candidate is found to replace poly(pyrrole) for continuous sensor applications, since its electrochemical stability is superior compared to the latter one. (c) 2004 Elsevier B.V. All rights reserved.
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