Geobacter spp. can acquire energy by coupling intracellular oxidation of organic matter with extracellular electron transfer to an anode (an electrode poised at a metabolically oxidizing potential), forming a biofilm extending many cell lengths away from the anode surface. It has been proposed that long-range electron transport in such biofilms occurs through a network of bound redox cofactors,...

An electrochemical sensor was developed by reconstituting pyrroloquinoline quinone (PQQ), flavin adenine dinucleotide (FAD) and L-proline dehydrogenase on gold electrode. Reversible redox peaks and low redox potential were obtained from cyclic voltammograms, proved that the attached PQQ and FAD accelerated electron communication between enzyme active site and gold electrode surface. It is expec...

Due to some important applications of guanine electrode in scientific and technology research such as electro-chemical DNA based biosensors, and a problem of high redox potential of guanine (0.81 V), our research study concentrates on reducing guanine redox potential by substituting Cu, Ag, Au, CH3, C2H5 and Cl on sites of 1, 2 and 9 of guanine. A 5.0% reduction...

a new schiff base 2-aminothiophenol furfural self assembled monolayer (sam) has been fabricated on a bare gold electrode as a novel sensor for determination of dopamine. electrochemical impedance spectroscopywas utilized to investigate the properties of the au 2-aminothiophenol furfural self assembled monolayermodified electrode (au atf sam-me) using the [fe(cn)6]3-/4- redox couple. the electro...

Dye-sensitized solar cells present promising low-cost alternatives to the conventional Silicon (Si)-based solar cells. The counter electrode  generally consists of Pt deposited onto FTO plate. Since Pt is rare and expensive metal, nanostructured carbonaceous materials have been widely investigated as a promising alternative to replace it. Carbon nanotubes  have shown significant properties such...

A monolayer of Nile Blue (NB) has been covalently immobilized on the self-assembled thiol-monolayer modified gold electrode. Cyclic voltammograms indicated a stable and reverse redox process of NB bonded on the electrode surface. The mechanisms of redox process coupling with proton transfer were proposed. The NB-modified electrode showed excellent electrocatalytic activity toward Nicotinamide a...

due to some important applications of guanine electrode in scientific and technology research such as electro-chemical dna based biosensors, and a problem of high redox potential of guanine (0.81 v), our research study concentrates on reducing guanine redox potential by substituting cu, ag, au, ch3, c2h5 and cl on sites of 1, 2 and 9 of guanine. a 5.0% reduction of redox potential for 9-ag-guan...

This review regards the use of dynamic electrochemistry to study the mechanism of redox enzymes, with exclusive emphasis on the configuration where the protein is adsorbed onto an electrode and electron tranfer is direct. We still often come across the statement these days that redox enzymes are too large and too fragile to interact directly with a metallic electrode without being at least part...

The direct electrochemistry of catalase (Ct) was accomplished at a gold electrode modified with single-wall carbon nanotubes (SWNTs). A pair of well-defined redox peaks was obtained for Ct with the reduction peak potential at 0.414 Vand a peak potential separation of 32 mVat pH 5.9. Both reflectance FT-IR spectra and the dependence of the reduction peak current on the scan rate revealed that Ct...

fabrication of a cysteamine (ca) self-assembled monolayer (sam) modified gold electrode insitufunctionalized with l-lysine (lys) is presented and described. the fabricated electrode was used forhighly selective and sensitive accumulation and the determination of copper ions (cu2+) in a nanomolarconcentration. techniques like cyclic voltammetry (cv) and electrochemical impedance spectroscopy (ei...