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Technological applications of surfatron produced discharge

V. STRAŇÁK1,2,* , M. TICHÝ2, V. KŘÍHA3, V. SCHOLTZ3, B. ŠERÁ4, P. ŠPATENKA1

Affiliation

  1. University of South Bohemia, Dept. of Physics, Jeronýmova 10, 371 15 České Budějovice, Czech Republic
  2. Charles University in Prague, Fac. of Math. and Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
  3. Czech Technical University, Faculty of Electrical Engineering, Technická 2, 166 27 Prague 6, Czech Republic
  4. Institute of Systems Biology and Ecology AS CR, Na Sádkách 7, 370 05 České Budějovice, Czech Republic

Abstract

The unique properties, which low-temperature plasma offers are frequently used for industrial plasma processing. Plasma surface treatment can lead to changes of free surface energy and also to bactericidal effects. We applied a plasma source of jet type based on surfatron principle for bio-technological experiments - surface activation of plastic materials, plasma sterilisation, increasing of seed germination. The surfatron source was powered by a microwave magnetron generator working at frequency 2.45 GHz with the output power range 0-300 W. Mixtures of Ar (carrier gas) and N2 or O2 (reactive gases) were mainly used for treatment of samples. The paper is focused on surface activation of low density polyethylene (LDPE) for the purpose of increasing free surface energy. The critical surface energy was obtained from approximation of experimental data in so-called Zisman plot. Bactericidal effects of Ar/O2 and Ar/N2 discharges under open atmosphere were tested on the bactericidal cultures Neisseria sicca, Deinococcus radiodurans, Enterococcus feacium and Stenotrophomonas maltophilia. These both discharges were also used for stimulation of germination of Lambs Quarter (Chenopodium album agg.) seeds..

Keywords

Surfatron, Microwave plasma, Surface energy, Plasma sterilisation, Stimulation of germination.

Submitted at: Nov. 2, 2006
Accepted at: April 15, 2007

Citation

V. STRAŇÁK, M. TICHÝ, V. KŘÍHA, V. SCHOLTZ, B. ŠERÁ, P. ŠPATENKA, Technological applications of surfatron produced discharge, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 4, pp. 852-857 (2007)