Electrified Graphene becomes A Bacterial Bug Zapper > 자유게시판

Graphene's long record of achievements is slightly longer today, as researchers from Rice University have used the material to make a bacterial bug zapper. A type of the fabric called laser-induced graphene (LIG) has beforehand been discovered to be antibacterial, and Zap Zone Defender now the staff has discovered that those properties might be kicked up a notch by adding a number of volts of electricity. The Rice staff, Zap Zone Defender headed up by Professor James Tour, first created LIG in 2014 through the use of 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 discovered to be efficient at preventing microbes from building up on its surface. To further check LIG's micro organism-blasting talents, the researchers took a sheet of polyimide and used a laser to turn half of the surface into LIG. The fabric was then positioned in a solution stuffed with Pseudomonas aeruginosa bacteria, Zap Zone Defender and a small cost was run by means of the LIG electrodes.

At 1.1 volts, the bacteria, which had been fluorescently tagged so the researchers could see them clearly, have been interested in the LIG anode and Zap Zone Defender moved in direction of it, like a bug zapper. At 1.5 volts, the micro organism that came into contact with the LIG had been killed within 30 seconds, and when the juice was cranked up to 2.5 volts, it solely took one second for them to disappear virtually solely. And because LIG is already a superb antifouling materials, the dead bugs do not accumulate on its floor. Next up, the researchers tested the material as a water-purification method, leaving these LIG electrodes in a solution of micro organism and partially-treated wastewater. After 9 hours at 2.5 volts, the zapper had killed 99.9 % of the bugs, without forming a lot of a biofilm on the surface. The scientists aren't positive precisely what's killing the micro organism, Zap Zone Defender but the situation 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 quickly poisoned by the hydrogen peroxide that's created in the method.

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