Enzymatic polymerization of polythiophene by immobilized glucose oxidase

Vida Krikstolaityte, Jurgis Kuliesius, Almira Ramanaviciene, Lina Mikoliunaite, Asta Kausaite-Minkstimiene, Yasemin Oztekin, Arunas Ramanavicius

Research output: Contribution to journalJournal articleResearchpeer-review


In this study 'green', environmentally friendly enzymatic reaction-based synthesis of conducting polymer polythiophene (PTP) is proposed. Glucose oxidase (GOx) was shown as an effective catalyst, which, in the presence of glucose, produces hydrogen peroxide suitable for the oxidative polymerization of PTP under ambient conditions at neutral pH. Enzymatically induced formation of the PTP layer over GOx-modified graphite rod electrode (GRE) was demonstrated and evaluated amperometrically and by attenuated total reflectance - Fourier transform infrared (ATR-FTIR) spectroscopy. Surface morphology of GOx- and PTP-modified GR electrodes was characterized by atomic force microscopy. It was clearly shown that the apparent kinetic Michaelis constant (KM(app.)) of GOx/PTP-modified GRE increased by increasing the duration of polymerization reaction. Therefore, enzymatic polymerization could be applied in adjustment and/or tuning of KM(app.) and other kinetic parameters of GOx-based electrodes used in biosensor design. (C) 2014 Elsevier Ltd. All rights reserved.
Original languageEnglish
Issue number7
Pages (from-to)1613-1620
Number of pages8
Publication statusPublished - 2014
Externally publishedYes


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