User:Jairahalindogan/sandbox
Assignment 4
[edit]Original - "Bacterial nanowires"
[edit]Implications and potential applications
[edit]Biologically it is unclear what is implied by the existence of bacterial nanowires. Nanowires may function as conduits for electron transport between different members of a microbial community.
Edit - "Bacterial nanowires"
[edit]*Note that the added section "Potential bioenergy uses" is intended to be separate from the present Implications and Potential Applications
Implications
[edit]Biologically it is unclear what is implied by the existence of bacterial nanowires. Nanowires may function as conduits for electron transport between different members of a microbial community.
Potential bioenergy uses
[edit]Bacterial nanowires have been shown to enhance microbial fuel cells due to their relatively long-range electrical conductivity[1]. Nanofilament networks of Shewanella oneidensis[2] and G. sulfurreducens[3] are able to transport electrons along centimeter-scale distances, greater than other mechanisms of biological electron transfer. In particular, nanowires of G. sulfurreducens, due to their metallic-like conductivity, are able to yield electricity levels comparable to those of synthetic metallic nanostructures[4]. Coating bacterial nanowires with metal oxides also promotes electrical conductivity[5]. The efficacy of bacterial nanowires suggests potential applications for microbe-produced nanomaterials in bioelectronics as well as microbial fuel cells as renewable energy sources[6].
Assignment 5: Edit #2 - "Bacterial Nanowires"
[edit]Implications and applications
[edit]Bioenergy uses in microbial fuel cells
[edit]In microbial fuel cells (MFCs), bacterial nanowires can generate electricity via extracellular electron transport to the MFC's anode [1]. Nanowire networks have been shown to enhance the electricity output of MFCs with efficient and long-range conductivity. In particular, pili of Geobacter sulfurreducens possess metallic-like conductivity, producing electricity at levels comparable to those of synthetic metallic nanostructures [4]. When bacterial strains are genetically manipulated to boost nanowire formation, higher electricity yields are generally observed [3]. Coating the nanowires with metal oxides further promotes electrical conductivity [5]. Additionally, these nanowires can transport electrons up to centimetre-scale distances [3]. Long-range electron transfer via pili networks allows viable cells that are not in direct contact with an anode to contribute to electron flow [7]. Thus, increased current production in MFCs is observed in thicker biofilms.
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- ^ a b Kodesia, A.; Ghosh, M.; Chatterjee, A. (September 5, 2017). "Development of Biofilm Nanowires and Electrode for Efficient Microbial Fuel Cells (MFCs)". Thapar University Digital Repository (TuDR).
- ^ El-Naggar, M.; Wanger, G.; Leung, K.M.; Yuzvinsky, T.D.; Southam, G.; Yang, J.; Lau, W.M.; Nealson, K.H.; Gorby, Y.A. (August 31, 2010). "Electrical transport along bacterial nanowires from Shewanella oneidensis MR-1". PNAS. 107 (42): 18127–18131. doi:10.1073/pnas.1004880107.
- ^ a b c Malvankar, N.S.; Lovley, D.R. (May 21, 2012). "Microbial Nanowires: A New Paradigm for Biological Electron Transfer and Bioelectronics". ChemSusChem. 5 (6): 1039–1046. doi:10.1002/cssc.201100733 – via Wiley Online Library.
- ^ a b Malvankar, N.S.; Vargas, M.; Nevin, K.P.; Franks, A.E.; Leang, C.; Kim, B.C.; Inoue, K. (August 7, 2011). "Tunable metallic-like conductivity in microbialnanowire networks". Nature Nanotechnology. 6: 573–579. doi:10.1038/NNANO.2011.119.
- ^ a b Maruthupandy, M.; Anand, M.; Maduraiveeran, G. (June 5, 2017). "Fabrication of CuO nanoparticles coated bacterial nanowire film for a high-performance electrochemical conductivity". J Mater Sci. 52: 10766–10778. doi:10.1007/s10853-017-1248-6.
- ^ Strycharz-Glaven, S.M.; Snider, R.M.; Guiseppi-Elie, A.; Tender, L.M. (August 26, 2011). "On the electrical conductivity of microbial nanowires and biofilms". Energy Environ. Sci. 4 (11): 4366–4379. doi:10.1039/C1EE01753E.
- ^ Reguera, Gemma (November 2006). "Biofilm and Nanowire Production Leads to Increased Current in Geobacter sulfurreducens Fuel Cells". Appl. Environ. Microbiol. 72: 7345–7348.