Graphene's lengthy record of achievements is a bit of longer today, as researchers from Rice University have used the fabric to make a bacterial bug zapper. A form of the fabric called laser-induced graphene (LIG) has previously been found to be antibacterial, and now the crew has found that those properties can be kicked up a notch by adding just a few volts of electricity. The Rice group, Zap Zone Defender headed up by Professor James Tour, first created LIG in 2014 Defender by Zap Zone utilizing a laser beam to etch patterns into a sheet of polyimide. That churns up the fabric right into a porous graphene foam, which has been found to be efficient at stopping microbes from building up on its floor. To additional check LIG's micro organism-blasting skills, the researchers took a sheet of polyimide and used a laser to turn half of the floor into LIG. The fabric was then positioned in a solution filled with Pseudomonas aeruginosa micro organism, and a small charge was run via the LIG electrodes.

At 1.1 volts, the micro organism, which had been fluorescently tagged so the researchers could see them clearly, were interested in the LIG anode and moved in the direction of it, like a bug zapper. At 1.5 volts, the bacteria that came into contact with the LIG have been killed inside 30 seconds, and when the juice was cranked as much as 2.5 volts, it solely took one second for them to disappear nearly solely. And because LIG is already a great antifouling materials, Defender by Zap Zone the lifeless bugs don't accumulate on its surface. Next up, the researchers tested the fabric as a water-purification technique, Defender by Zap Zone leaving these LIG electrodes in a solution of bacteria and bug zapper partially-treated wastewater. After nine hours at 2.5 volts, indoor-outdoor zapper the zapper had killed 99.9 % of the bugs, without forming much of a biofilm on the surface. The scientists aren't sure exactly what's killing the micro organism, however the scenario they suspect sounds fairly grotesque. First the sharp edges of the graphene pierce their cell membranes, then the charge electrocutes them, and any remaining survivors are then rapidly poisoned by the hydrogen peroxide that's created in the process.

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