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  • Title: A novel functional conducting polymer as an immobilization platform.
    Author: Guler E, Soyleyici HC, Demirkol DO, Ak M, Timur S.
    Journal: Mater Sci Eng C Mater Biol Appl; 2014 Jul 01; 40():148-56. PubMed ID: 24857477.
    Abstract:
    Here, we present the fabrication of conducting polymer based enzymatic and microbial biosensors. To obtain immobilization platforms for both pyranose oxidase (PyOx) and Gluconobacter oxydans, the graphite electrode surface was modified with the polymer of 4-amino-N-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)benzamide (HKCN) which has free amino groups on the surface for further bioconjugation reactions with the biomolecules. Initially, the electrode surface was covered with HKCN via electropolymerization. Then, either PyOx or G. oxydans cell was stabilized using glutaraldehyde as a cross-linker. After optimization of biosensors, analytical characterization and surface imaging studies were investigated. The change of current depends on glucose concentration between 0.05-1.0mM and 0.25-2.5mM with HKCN/PyOx and HKCN/G. oxydans biosensors in batch systems. Also, the calibration graphs were obtained for glucose in FIA mode, and in this case, linear ranges were found to be 0.01-1.0mM and 0.1-7.5mM for HKCN/PyOx and HKCN/G. oxydans, respectively.
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