Electricity Turns Graphene into ‘bug Zapper’ For Bacteria > 자유게시판

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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 in opposition to "biofouling," the buildup of microorganisms, plants, or other biological material on wet surfaces. As well as, the workforce additionally found that, when the fabric is electrified, it additionally kills bacteria. LIG is a spongy version of graphene, the one-atom layer of carbon atoms. The Rice University lab of chemist James Tour developed it three years in the past by burning partway via 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 material in wearable electronics and Zappify Bug Zapper brand gas cells and for superhydrophobic or superhydrophilic surfaces. "This type of graphene is extraordinarily resistant to biofilm formation, which has promise for locations like water-remedy plants, oil-drilling operations, hospitals, and ocean applications like underwater pipes that are sensitive to fouling," says Tour, a professor of computer science in addition to of supplies science and nanoengineering, whose team’s report appears in ACS Applied Materials and Interfaces.

When used as electrodes with a small utilized voltage, LIG turns into the bacterial equivalent of a yard Zappify Bug Zapper brand zapper. Tests with out the cost confirmed what has lengthy been identified-that graphene-primarily based nanoparticles have antibacterial properties. When 1.1 to 2.5 volts have been utilized, the highly conductive LIG electrodes "greatly enhanced" these properties. Under the microscope, the researchers watched as fluorescently tagged Pseudomonas aeruginosa micro organism in an answer with LIG electrodes above 1.1 volts were drawn toward the anode. Above 1.5 volts, the cells started to disappear and vanished completely inside 30 seconds. At 2.5 volts, bacteria disappeared almost fully from the surface after one second. The lab partnered with Professor Christopher Arnusch, a lecturer at the Ben-Gurion University Zuckerberg Institute for Water Research who makes a speciality of water purification. Arnusch’s lab examined LIG electrodes in a micro organism-laden answer with 10 % secondary treated wastewater and located that after 9 hours at 2.5 volts, 99.9 percent of the micro organism were killed and the electrodes strongly resisted biofilm formation.

The researchers suspect bacteria may meet their demise by way of a mix of contact with the tough floor of LIG, the electrical charge, and toxicity from localized production of hydrogen peroxide. The contact may be something like a knee hitting pavement, but in this case, the bacteria are all knee and the sharp graphene edges quickly destroy their membranes. Fortunately, LIG’s anti-fouling properties keep lifeless bacteria from accumulating on the floor, Tour says. "The mixture of passive biofouling inhibition and energetic voltage-induced microbial elimination will possible make this a highly sought-after material for inhibiting the expansion of troublesome pure 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 analysis.

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