Plasma Process. Polym. 12∕2013

Abstract

Cover: Dielectric Barrier Discharge (DBD) plasma devices are known ozone generators. The role of produced ozone in DBD sterilization was studied by examining its lethality to Escherichia coli. Measuring the levels of ozone produced during and after plasma generation identifies three phases: production, diffusion and decay. Each of these phases is characterized by an empirical formula. A correlation between the ozone production and the input energy flux to the plasma devices is also developed that is key to surface plasma sterilization. Further details can be found in the article by Subrata Roy et. al. http://doi.wiley.com/10.1002/ppap.201300108.

Effect of air, O2, Ar, and N2 plasma‐activated water on mildewing activity of moldy pathogen of Gannan navel oranges

“…[ 27,40,41 ] The $$\cdot \text{OH}$$ radical has a strong oxidation ability and can react with unsaturated fatty acids on the cell membrane, thereby causing cell membrane damage and eventually killing the cell. [ 27 ] Both $${{\rm{O}}}_{3}$$ and $${{\rm{H}}}_{2}{{\rm{O}}}_{2}$$ species also have pronounced bactericidal effects, [ 42,43 ] and water molecules interact with reactive oxygen species, active nitrogen‐free radicals produced by plasma, while RONS formed in PAW also play an important role in microbial inactivation. [ 44 ]…”

Comparison of CO production and Escherichia coli inactivation by a kHz and a MHz plasma jet

“…[ 56 ] These results agree well with studies in the literature that similarly suggest ozone as an effective disinfection agent for E. coli bacteria. [ 57–59 ] For example, Pavlovich et al demonstrated that antibacterial effects on E. coli from indirect air DBD treatment of water directly correlate with the measured ozone density in the gas phase. [ 57 ] Additionally, the amount of ozone produced in the plasma with increasing $${\text{CO}}_{2}$$ admixture directly correlates to the disinfection surface trend observed in our experiments.…”