Electrified Graphene Turns Into A Bacterial Bug Zapper
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Version vom 31. August 2025, 18:30 Uhr
Graphene's lengthy record of achievements is somewhat longer at the moment, as researchers from Rice University have used the fabric to make a bacterial electric bug zapper zapper. A type of the fabric called laser-induced graphene (LIG) has previously been found to be antibacterial, and now the workforce has found that those properties may be kicked up a notch by including a couple of volts of electricity. The Rice team, headed up by Professor James Tour, first created LIG in 2014 by using 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 test LIG's micro organism-blasting talents, the researchers took a sheet of polyimide and used a laser to turn half of the floor into LIG. The fabric was then placed in a solution stuffed with Pseudomonas aeruginosa micro organism, and backyard mosquito control a small cost was run by way of the LIG electrodes.
At 1.1 volts, the bacteria, which had been fluorescently tagged so the researchers could see them clearly, were interested in the LIG anode and backyard mosquito control moved in direction of it, like a electric bug zapper zapper. At 1.5 volts, the bacteria that got here into contact with the LIG were killed within 30 seconds, and when the juice was cranked as much as 2.5 volts, it solely took one second for them to disappear virtually fully. And since LIG is already a superb antifouling material, the dead bugs do not accumulate on its floor. Next up, the researchers tested the fabric as a water-purification method, leaving these LIG electrodes in an answer of bacteria and partially-treated wastewater. After 9 hours at 2.5 volts, backyard mosquito control the zapper had killed 99.9 p.c of the bugs, without forming much of a biofilm on the surface. The scientists aren't positive precisely what's killing the bacteria, however the situation they suspect sounds fairly ugly. First the sharp edges of the graphene pierce their cell membranes, then the charge electrocutes them, and any remaining survivors are then shortly poisoned by the hydrogen peroxide that is created in the method.
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