Search results for "extracellular electron transfer"

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From Microorganism-Based Amperometric Biosensors towards Microbial Fuel Cells

2021

This review focuses on the overview of microbial amperometric biosensors and microbial biofuel cells (MFC) and shows how very similar principles are applied for the design of both types of these bioelectronics-based devices. Most microorganism-based amperometric biosensors show poor specificity, but this drawback can be exploited in the design of microbial biofuel cells because this enables them to consume wider range of chemical fuels. The efficiency of the charge transfer is among the most challenging and critical issues during the development of any kind of biofuel cell. In most cases, particular redox mediators and nanomaterials are applied for the facilitation of charge transfer from a…

Microbial fuel cellBioelectric Energy SourcesPolymersMicroorganismNanotechnologyBiosensing TechniquesReview02 engineering and technologyyeastbioelectronicslcsh:Chemical technology010402 general chemistry01 natural sciencesBiochemistryRedoxAnalytical ChemistryNanomaterialsmicrobial biosensorslcsh:TP1-1185microbial biofuel cells ; yeast ; direct electron transfer ; extracellular electron transfer ; cell membrane/wall modifications ; conducting polymers ; enzyme-based biofuel cells ; bioelectronics ; microbial biosensors ; whole cell-based biosensorsdirect electron transferenzyme-based biofuel cellsElectrical and Electronic EngineeringElectrodesconducting polymersInstrumentationwhole cell-based biosensorsConductive polymerBioelectronicsextracellular electron transferChemistryfungitechnology industry and agriculturefood and beveragesmicrobial biofuel cells021001 nanoscience & nanotechnologyAtomic and Molecular Physics and Optics0104 chemical sciencescell membrane/wall modificationsBiofuel0210 nano-technologyOxidation-ReductionBiosensorSensors
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Electron transfer mechanism in Shewanella loihica PV-4 biofilms formed at graphite electrode

2012

Abstract Electron transfer mechanisms in Shewanella loihica PV-4 viable biofilms formed at graphite electrodes were investigated in potentiostat-controlled electrochemical cells poised at oxidative potentials (0.2 V vs. Ag/AgCl). Chronoamperometry (CA) showed a repeatable biofilm growth of S. loihica PV-4 on graphite electrode. CA, cyclic voltammetry (CV) and its first derivative shows that both direct electron transfer (DET) mediated electron transfer (MET) mechanism contributes to the overall anodic (oxidation) current. The maximum anodic current density recorded on graphite was 90 μA cm − 2 . Fluorescence emission spectra shows increased concentration of quinone derivatives and riboflavi…

ShewanellaElectroactive biofilmBioelectric Energy SourcesExtracellular Electron TransferRiboflavinInorganic chemistryBiophysicsElectrochemical cellElectron TransportElectron transferGraphite electrodeElectrochemistryGraphitePhysical and Theoretical ChemistryElectrodesMicroscopy ConfocalChemistryQuinonesBiofilmmediated electron transferElectrochemical TechniquesGeneral MedicineChronoamperometryAnodeSpectrometry FluorescenceShewanella loihica PV- 4Extracellular Electron Transfer; Shewanella loihica PV- 4; Electroactive biofilms; Graphite electrode; mediated electron transferBiofilmsMicroscopy Electron ScanningGraphiteDifferential pulse voltammetryCyclic voltammetryOxidation-ReductionBioelectrochemistry
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