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Bacterial nanowires (also known as microbial nanowires) are electrically conductive appendages produced by a number of bacteria most notably from the Geobacter and Shewanella genera. [ 1 ] [ 2 ] Conductive nanowires have also been confirmed in the oxygenic cyanobacterium Synechocystis PCC6803 and a thermophilic , methanogenic coculture ...
Recently, microbial electrosynthesis cells (MES) have also emerged as a promising MET, where valuable chemicals can be produced in the cathode compartment. [2] [3] [4] Other MET applications include microbial remediation cell, microbial desalination cell, microbial solar cell, microbial chemical cell, etc.,. [5] [6] [7]
A nanowire is a nanostructure in the form of a wire with the diameter of the order of a nanometre (10 −9 m). More generally, nanowires can be defined as structures that have a thickness or diameter constrained to tens of nanometers or less and an unconstrained length.
Shewanella, which makes protein nanowires [3] Geobacter, which makes protein nanowires out of pilin [4] Methanobacterium palustre [5] Methanococcus maripaludis [6] Mycobacterium smegmatis [7] [8] Modified Escherichia coli (with Geobacter nanowire genes) [9] [10] A broad collection of 30 bacteria varieties from marine sediments [11] [12]
Geobacter sulfurreducens and its bacterial nanowires. Geobacter sulfurreducens is a rod-shaped microbe with a gram-negative cell wall.Geobacter is known as a type of bacteria that is able to conduct levels of electricity, and the species G. sulfurreducens is also known as “electricigens” due to their ability to create an electric current and produce electricity. [4]
Microbial electrosynthesis (MES) is a form of microbial electrocatalysis in which electrons are supplied to living microorganisms via a cathode in an electrochemical cell by applying an electric current. The electrons are then used by the microorganisms to reduce carbon dioxide to yield industrially relevant products.
In the future, cable bacteria may play a role in increasing the efficiency of microbial fuel cells deployed in sedimentary environments. Cable bacteria have also been found associated with a bioelectrochemical system that enhances the degradation of marine sediment contaminated by hydrocarbons [ 25 ] and thus may play a role in future oil spill ...
Nanofabrication can be used to construct ultradense parallel arrays of nanowires, as an alternative to synthesizing nanowires individually. [ 3 ] [ 4 ] Of particular prominence in this field, Silicon nanowires are being increasingly studied towards diverse applications in nanoelectronics, energy conversion and storage.