characterizing-electron-transport-through-living-biofilms

Characterizing Electron Transport through Living Biofilms

Here we demonstrate the method of electrochemical gating used to characterize electrical conductivity of electrode-grown microbial biofilms under ...

Naval Research Laboratory

George Mason University

Microbial biofilms grown utilizing electrodes as metabolic electron acceptors or donors are a new class of biomaterials with distinct electronic properties. Here we report that electron transport through living electrode-grown Geobacter sulfurreducens biofilms is a thermally activated process with incoherent redox conductivity. The temperature dependency of this process is consistent with electron-transfer reactions involving hemes of c-type cytochromes known to play important roles in G. sulfurreducens extracellular electron transport. While incoherent redox conductivity is ubiquitous in biological systems at molecular-length scales, it is unprecedented over distances it appears to occur through living G. sulfurreducens biofilms, which can exceed 100 microns in thickness. 

Article	Year
Thermally activated long range electron transport in living biofilms. Physical chemistry chemical physics : PCCP\| PubMed ID: 26611733	2015
Measuring conductivity of living Geobacter sulfurreducens biofilms. Nature nanotechnology\| PubMed ID: 27821847	2016

Jared Roy

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