title: Towards a novel bioelectrocatalytic platform based on "wiring" of pyrroloquinoline quinone-dependent glucose dehydrogenase with an electrospun conductive polymeric fiber architecture.
abstract: Electrospinning is known as a fabrication technique for electrode architectures that serve as immobilization matrices for biomolecules. The current work demonstrates a novel approach to construct a conductive polymeric platform, capable not only of immobilization, but also of electrical connection of the biomolecule with the electrode. It is produced upon electrospinning from mixtures of three different highly conductive sulfonated polyanilines and polyacrylonitrile on ITO electrodes. The resulting fiber mats are with a well-retained conductivity. After coupling the enzyme pyrroloquinoline quinone-dependent glucose dehydrogenase (PQQ-GDH) to polymeric structures and addition of the substrate glucose an efficient bioelectrocatalysis is demonstrated. Depending on the choice of the sulfonated polyanilline mediatorless bioelectrocatalysis starts at low potentials; no large overpotential is needed to drive the reaction. Thus, the electrospun conductive immobilization matrix acts here as a transducing element, representing a promising strategy to use 3D polymeric scaffolds as wiring agents for active enzymes. In addition, the mild and well reproducible fabrication process and the active role of the polymer film in withdrawing electrons from the reduced PQQ-GDH lead to a system with high stability. This could provide access to a larger group of enzymes for bioelectrochemical applications including biosensors and biofuel cells.
authors.affiliation: Biosystems Technology, Institute for Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, D-15745, Wildau, Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Gladisch
authors.affiliation: Biosystems Technology, Institute for Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, D-15745, Wildau, Germany.|Department of Chemistry and Centre for NanoScience (CeNS), University of Munich (LMU), Butenandtstraße 5-13 (E), D-81377, Munich, Germany.
authors.forename: David
authors.initials: D
authors.lastname: Sarauli
authors.affiliation: Biosystems Technology, Institute for Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, D-15745, Wildau, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Schäfer
authors.affiliation: Institute for Thin Film and Microsensor Technologies, Kantstraße 55, D-14513 Teltow, Germany.
authors.forename: Birgit
authors.initials: B
authors.lastname: Dietzel
authors.affiliation: Institute for Thin Film and Microsensor Technologies, Kantstraße 55, D-14513 Teltow, Germany.
authors.forename: Burkhard
authors.initials: B
authors.lastname: Schulz
authors.affiliation: Biosystems Technology, Institute for Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, D-15745, Wildau, Germany.
authors.forename: Fred
authors.initials: F
authors.lastname: Lisdat
mesh_terms: D001674:Bioelectric Energy Sources; D015374:Biosensing Techniques / Q000379:methods*; D004553:Electric Conductivity; D004566:Electrodes; D004800:Enzymes, Immobilized / Q000737:chemistry*; D005948:Glucose Dehydrogenases / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D045542:PQQ Cofactor / Q000737:chemistry
chemical_list: D004800:Enzymes, Immobilized; D037742:Nanotubes, Carbon; D045542:PQQ Cofactor; D005948:Glucose Dehydrogenases; C033955:glucose dehydrogenase (pyrroloquinoline-quinone)
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