Sciences and Future

Health

By

Camille Gaubert

the 22.09.2020 at 8:34 p.m.

Cold plasma, fourth state of matter, would clean surfaces of viruses that sick people have deposited there.

Door handles, metro bars and elevator button that we all have to touch every day one after the other, could become more protective than risky. The treatment of surfaces with cold plasma already allows, according to initial work carried out at the Université Libre de Bruxelles (ULB), to clean contaminated surfaces. Better, cold plasma could make some metal surfaces unsuitable for bacteria and viruses to survive.

Cold plasma is a fourth state of matter, after the solid, liquid and gas. To get some, it is necessary to apply an electric field to a gas – for example the ambient air, specifies to Sciences et Avenir Professor Anne Op de Beeck, virologist at ULB and CNRS and who participates in this work. The atoms that make up the gas will then lose electrons, which will give them an electric charge. They are said to be ionized. When the atoms are all ionized, we are talking about hot plasma. A l’inverse, incomplete ionization results in cold plasma, explains the Cold Plasma Network. By trying to get rid of their excess energy, the ions will come into contact with the organic molecules of viruses, like lipids, protein or RNA (genetic material close to DNA). In contact with these ions, viruses are “destroyed, inactivated, they can no longer be infectious”, explains Prof. Op de Beeck, whose work focuses on highly resistant viruses, but also on coronaviruses including that of Covid-19, more fragile. Their first results are promising, the surfaces being cleaned after a few seconds of exposure to cold plasma.

Even better, cold plasma treatment of certain metal surfaces could make them themselves virucidal. Any virus depositing there would be directly destroyed, allowing the design of always secure door handles or elevator buttons. “This type of surfaces could inactivate not only viruses, but also other pathogens such as bacteria for example, and therefore greatly reduce the incidence of pandemics in general”, conclut la Pr Op de Beeck.

COVID-19
Virus
Coronavirus

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Source: https://www.sciencesetavenir.fr/sante/video-utiliser-le-plasma-froid-pour-tuer-les-virus_147590

Plasma, Virus, Plasma physics, State of matter

World news – FR – VIDEO. Using cold plasma to kill viruses

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