Figure 5 | Scientific Reports

Figure 5

From: A low power flexible dielectric barrier discharge disinfects surfaces and improves the action of hydrogen peroxide

Figure 5

Spectral analysis of the flex-DBD: (a) Optical emission spectrum showing the OH· emission band. (b) Infrared absorption spectrum showing the long-lived active species, O3, NO2, N2O, etc. produced in the discharge. Spectrum taken after 1 min of operation at the power and voltage used for treating bacteria. (c) Fluorescence of the 7-hydroxycoumarin indicating the presence of OH· in solution. Solution of coumarin in PBS, and coumarin with H2O2 are not different from the coumarin in water that is used to produce the baseline spectra. Fluorescence intensity increased at 460 nm following plasma treatment (DBD) and further increased for plasma treated H2O2 solution (DBD + H2O2). Spectra were taken immediately after treating 1.5 ml liquid samples for 5 min at the same DBD setting. Each curve is an average of three trials.

Back to article page