Electricity Turns Graphene Into ‘bug Zapper’ For Bacteria

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Révision datée du 22 octobre 2025 à 08:37 par TrinaBadcoe (discussion | contributions) (Page créée avec « <br>You might be free to share this text beneath the Attribution 4.0 International license. Scientists have found that laser-induced graphene (LIG) can protect against "bi... »)
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You might be free to share this text beneath the Attribution 4.0 International license. Scientists have found that laser-induced graphene (LIG) can protect against "biofouling," the buildup of microorganisms, plants, or other biological materials on wet surfaces. In addition, the workforce also discovered 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 in the past by burning partway through a cheap polyimide sheet with a laser, which turned the surface right into a lattice of interconnected graphene sheets. The researchers have since suggested makes use of for the fabric in wearable electronics and indoor-outdoor zapper fuel cells and for superhydrophobic or superhydrophilic surfaces. "This type of graphene is extremely resistant to biofilm formation, which has promise for places like water-remedy plants, oil-drilling operations, hospitals, and ocean purposes like underwater pipes which might be sensitive to fouling," says Tour, a professor of computer science as well as of supplies science and Zap Zone Defender Device nanoengineering, whose team’s report seems in ACS Applied Materials and Interfaces.



When used as electrodes with a small applied voltage, LIG turns into the bacterial equivalent of a yard bug zapper. Tests with out the charge confirmed what has lengthy been recognized-that graphene-primarily based nanoparticles have antibacterial properties. When 1.1 to 2.5 volts were applied, the extremely 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 had been drawn towards the anode. Above 1.5 volts, the cells started to disappear and vanished completely inside 30 seconds. At 2.5 volts, bacteria disappeared nearly utterly from the floor after one second. The lab partnered with Professor Zap Zone Defender Device Christopher Arnusch, Zap Zone Defender USA a lecturer at the Ben-Gurion University Zuckerberg Institute for Zap Zone Defender USA Water Research who focuses on water purification. Arnusch’s lab examined LIG electrodes in a micro organism-laden solution with 10 p.c secondary handled wastewater and found that after nine hours at 2.5 volts, 99.9 % of the micro organism have been killed and the electrodes strongly resisted biofilm formation.



The researchers suspect micro organism might meet their demise through a combination of contact with the rough floor of LIG, the electrical cost, and toxicity from localized production of hydrogen peroxide. The contact may be one thing like a knee hitting pavement, however in this case, the bacteria are all knee and the sharp graphene edges shortly destroy their membranes. Fortunately, LIG’s anti-fouling properties keep dead bacteria from accumulating on the surface, Tour says. "The mixture of passive biofouling inhibition and energetic voltage-induced microbial elimination will doubtless make this a extremely sought-after material for inhibiting the growth of troublesome natural fouling that plagues many industries," Tour says. Other authors embrace 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, the Air Force Office of Scientific Research, and its Multidisciplinary University Research Initiative supported the research.



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