Living Bioelectrochemical Composites.

Autor: McCuskey SR; Department of Chemical Engineering, University of California, Santa Barbara, California, 93106, USA.; Center for Polymers and Organic Solids, University of California, Santa Barbara, California, 93106, USA., Su Y; Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, 93106, USA.; Center for Polymers and Organic Solids, University of California, Santa Barbara, California, 93106, USA.; Departments of Chemistry and Chemical Engineering, National University of Singapore, Singapore, 119077, Singapore., Leifert D; Center for Polymers and Organic Solids, University of California, Santa Barbara, California, 93106, USA., Moreland AS; Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, 93106, USA.; Center for Polymers and Organic Solids, University of California, Santa Barbara, California, 93106, USA., Bazan GC; Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, 93106, USA.; Center for Polymers and Organic Solids, University of California, Santa Barbara, California, 93106, USA.; Departments of Chemistry and Chemical Engineering, National University of Singapore, Singapore, 119077, Singapore.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2020 Jun; Vol. 32 (24), pp. e1908178. Date of Electronic Publication: 2020 Apr 29.
DOI: 10.1002/adma.201908178
Abstrakt: Composites, in which two or more material elements are combined to provide properties unattainable by single components, have a historical record dating to ancient times. Few include a living microbial community as a key design element. A logical basis for enabling bioelectronic composites stems from the phenomenon that certain microorganisms transfer electrons to external surfaces, such as an electrode. A bioelectronic composite that allows cells to be addressed beyond the confines of an electrode surface can impact bioelectrochemical technologies, including microbial fuel cells for power production and bioelectrosynthesis platforms where microbes produce desired chemicals. It is shown that the conjugated polyelectrolyte CPE-K functions as a conductive matrix to electronically connect a three-dimensional network of Shewanella oneidensis MR-1 to a gold electrode, thereby increasing biocurrent ≈150-fold over control biofilms. These biocomposites spontaneously assemble from solution into an intricate arrangement of cells within a conductive polymer matrix. While increased biocurrent is due to more cells in communication with the electrode, the current extracted per cell is also enhanced, indicating efficient long-range electron transport. Further, the biocomposites show almost an order-of-magnitude lower charge transfer resistance than CPE-K alone, supporting the idea that the electroactive bacteria and the conjugated polyelectrolyte work synergistically toward an effective bioelectronic composite.
(© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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