Electricity Turns Graphene into ‘bug Zapper’ For Bacteria
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작성자 Jaqueline 작성일25-08-16 15:24 조회6회 댓글0건관련링크
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You are free to share this article below the Attribution 4.0 International license. Scientists have discovered that laser-induced graphene (LIG) can protect towards "biofouling," the buildup of microorganisms, plants, or different biological material on wet surfaces. In addition, the team also found that, when the material is electrified, it additionally kills bacteria. LIG is a spongy version of graphene, the only-atom layer of carbon atoms. The Rice University lab of chemist James Tour developed it three years ago by burning partway by way of a cheap polyimide sheet with a laser, which turned the surface right into a lattice of interconnected graphene sheets. The researchers have since steered uses for the material in wearable electronics and gasoline cells and for superhydrophobic or superhydrophilic surfaces. "This form of graphene is extraordinarily resistant to biofilm formation, which has promise for places like water-treatment plants, oil-drilling operations, hospitals, and ocean functions like underwater pipes which are delicate to fouling," says Tour, indoor-outdoor zapper a professor of pc science in addition to of materials science and nanoengineering, whose team’s report appears in ACS Applied Materials and Interfaces.
When used as electrodes with a small applied voltage, indoor-outdoor zapper LIG turns into the bacterial equal of a backyard bug indoor-outdoor zapper. Tests without the cost confirmed what has long been known-that graphene-based nanoparticles have antibacterial properties. When 1.1 to 2.5 volts had been utilized, the highly conductive LIG electrodes "greatly enhanced" those properties. Under the microscope, the researchers watched as fluorescently tagged Pseudomonas aeruginosa micro organism in an answer with LIG electrodes above 1.1 volts have been drawn toward the anode. Above 1.5 volts, the cells began to disappear and vanished fully inside 30 seconds. At 2.5 volts, micro organism disappeared virtually fully from the floor after one second. The lab partnered with Professor Christopher Arnusch, a lecturer at the Ben-Gurion University Zuckerberg Institute for Water Research who focuses on water purification. Arnusch’s lab tested LIG electrodes in a bacteria-laden answer with 10 p.c secondary handled wastewater and located that after 9 hours at 2.5 volts, 99.9 p.c of the bacteria were killed and the electrodes strongly resisted biofilm formation.
The researchers suspect micro organism might meet their demise by way of a combination of contact with the rough floor of LIG, the electrical cost, and toxicity from localized manufacturing of hydrogen peroxide. The contact may be something like a knee hitting pavement, but in this case, the micro organism are all knee and the sharp graphene edges shortly destroy their membranes. Fortunately, LIG’s anti-fouling properties keep lifeless micro organism from accumulating on the floor, Zap Zone Defender USA Tour says. "The combination of passive biofouling inhibition and active voltage-induced microbial removal will likely make this a highly sought-after materials for inhibiting the expansion of troublesome natural fouling that plagues many industries," Tour says. Other authors include researchers from Ben-Gurion University of the Negev and Rice University. The United States−Israel Binational Science Foundation, the Canadian Associates of Ben-Gurion University of the Negev Quebec Region, the Israel Science Foundation, Zap Zone Defender Setup the Air Force Office of Scientific Research, indoor-outdoor zapper and its Multidisciplinary University Research Initiative supported the research.
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