Multi-Hollow Surface Dielectric Barrier Discharge for Bacterial Biofilm Decontamination

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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KELAR TUČEKOVÁ Zlata VACEK Lukáš KRUMPOLEC Richard KELAR Jakub ZEMÁNEK Miroslav ČERNÁK Mirko RŮŽIČKA Filip

Rok publikování 2021
Druh Článek v odborném periodiku
Časopis / Zdroj Molecules
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.3390/molecules26040910
Doi http://dx.doi.org/10.3390/molecules26040910
Klíčová slova atmospheric pressure plasma; low-temperature plasma; plasma-activated media; bacterial biofilm; decontamination
Popis The plasma-activated gas is capable of decontaminating surfaces of different materials in remote distances. The effect of plasma-activated water vapor on Staphylococcus epidermidis, methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli biofilm contamination was investigated on the polypropylene nonwoven textile surface. The robust and technically simple multi-hollow surface dielectric barrier discharge was used as a low-temperature atmospheric plasma source to activate the water-based medium. The germicidal efficiency of short and long-time exposure to plasma-activated water vapor was evaluated by standard microbiological cultivation and fluorescence analysis using a fluorescence multiwell plate reader. The test was repeated in different distances of the contaminated polypropylene nonwoven sample from the surface of the plasma source. The detection of reactive species in plasma-activated gas flow and condensed activated vapor, and thermal and electrical properties of the used plasma source, were measured. The bacterial biofilm decontamination efficiency increased with the exposure time and the plasma source power input. The log reduction of viable biofilm units decreased with the increasing distance from the dielectric surface.
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