1 Electrified Graphene becomes A Bacterial Bug Zapper
Nathaniel Ellington edited this page 2025-09-22 04:59:18 +08:00
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Graphene's lengthy checklist of achievements is somewhat longer today, as researchers from Rice University have used the fabric to make a bacterial bug zapper. A form of the fabric referred to as laser-induced graphene (LIG) has previously been discovered to be antibacterial, and now the team has discovered that those properties could be kicked up a notch by including a few volts of electricity. The Rice group, headed up by Professor James Tour, Zap Zone Defender first created LIG in 2014 by using a laser beam to etch patterns into a sheet of polyimide. That churns up the material right into a porous graphene foam, Zap Zone Defender which has been found to be effective at stopping microbes from building up on its surface. To additional test LIG's micro organism-blasting talents, the researchers took a sheet of polyimide and Zap Zone Defender used a laser to turn half of the surface into LIG. The material was then placed in an answer full of Pseudomonas aeruginosa bacteria, Zap Zone Defender and a small charge was run by way of the LIG electrodes.


At 1.1 volts, the bacteria, Zap Zone Defender which had been fluorescently tagged so the researchers might see them clearly, were attracted to the LIG anode and moved in the direction of it, like a bug zapper. At 1.5 volts, Zap Zone Defender the micro organism that came into contact with the LIG have been 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 almost totally. And since LIG is already a very good antifouling material, the dead bugs do not accumulate on its surface. Next up, Defender by Zap Zone the researchers tested the fabric as a water-purification technique, leaving these LIG electrodes in an answer of micro organism and partially-treated wastewater. After nine hours at 2.5 volts, the zapper had killed 99.9 % of the bugs, without forming much of a biofilm on the floor. The scientists aren't sure exactly what's killing the bacteria, however the state of affairs 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 quickly poisoned by the hydrogen peroxide that is created in the process.


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