Helium atmospheric pressure plasma jet parameters and their influence on bacteria deactivation in a medium

Atmospheric pressure plasmas are becoming relevant in local microbial deactivation and other combined effects of on living organisms. For this reason, our research was focussed optimisation atmospheric plasma jet (APPJ) parameters to complete the different bacteria strains a medium. Different helium APPJ treatments with discharge were used, such as input voltages gas flows. To better understand properties behind at optimised parameters, optical electrical diagnostics performed, including characterisation source, emission spectroscopy plume intensified charged coupled device imaging behaviour for every set parameters. Then, resulting liquid chemistry assessed establish connections between reactive species generated gaseous phases. The most efficient found higher powers flow rates, that linked densities oxygen nitrogen species, especially hydrogen peroxide medium solvated charges.