AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Autori: IONEL CĂTĂLIN POPESCU.
DOI: 10.24193/subbchem.2020.1.01
Published Online: 2020-03-30
Published Print: 2020-03-30
pp. 7-16
VIEW PDF: FULL PDF
Cyclic voltammetry (CV) and short-time scale chronoamperometry measurements were performed aiming to investigate the layer-by-layer self-assembled multilayer structures built on Au electrodes. The attractive electrostatic interactions exerted between the successively deposited layers of charged polymers were exploited in order to immobilize a cationic Os redox polymer onto the surface of Au modified electrodes. CV responses observed at the resulted Au modified electrodes proved the efficiency of the proposed design. The chronoamperometric responses were fitted by using a three-phase exponential decay function. The fitting parameters allowed comparing the ability of charge transfer of the investigated modified electrodes. The most efficient structure was used as an amperometric transducer for electrical communication between fructose dehydrogenase and the Au electrode. In order to validate the new approach as a proof of concept for obtaining reagentless biosensors, a functional amperometric biosensor for D-fructose was successfully built.
Keywords: Self-assembled multilayer architecture, electrostatic interactions, Au modified electrodes, reagentless amperometric biosensors, Os redox polymer.
