Eur. Phys. J. Appl. Phys.
Volume 75, Number 2, August 2016
6th Central European Symposium on Plasma Chemistry (CESPC-6)
|Number of page(s)||6|
|Section||Plasma, Discharges and Processes|
|Published online||08 August 2016|
Inactivation of Escherichia coli on PTFE surfaces by diffuse coplanar surface barrier discharge*
Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská Dolina, 842 48 Bratislava, Slovakia
2 Division of Environmental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská Dolina, 842 48 Bratislava, Slovakia
3 R&D Center for Low-Cost Plasma and Nanotechnology Surface Modifications, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
a e-mail: firstname.lastname@example.org
Revised: 19 April 2016
Accepted: 9 May 2016
Published online: 8 August 2016
The non-equilibrium plasma of diffuse coplanar surface barrier discharge (DCSBD) was tested for decontamination of bacteria Escherichia coli on polymer surfaces. We investigated the optical parameters of DCSBD plasma generated in synthetic air with different relative humidity. Our study was provided to estimate the main plasma components active during the DCSBD plasma degradation of E. coli contamination prepared on polytetrafluoroethylene (PTFE, Teflon) surface, in ambient air at atmospheric pressure. The DCSBD plasma was characterized by means of electrical measurements and optical emission spectroscopy. The inactivation of E. coli bacteria was evaluated by standard microbiological cultivation (CFU plate counting). The experimental results of the germicidal efficiency obtained for short plasma exposure times proved the effectiveness of DCSBD plasma for the polymer surface decontamination.
© EDP Sciences, 2016
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