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. 2020 Feb 4;12(2):348. doi: 10.3390/cancers12020348

Figure 1.

Figure 1

Experimental configuration and optical emission spectra of the different discharge modes with helium as the plasma-forming gas. (A) Simplified electrical circuit of the convertible plasma device. (B) Graphic representation of the treatment of cell suspensions in the jet mode. (C) Sketch of the convertible plasma device in the Ω mode. (D) Sketch of the convertible plasma device in the γ mode. (E) Sketch of the convertible plasma device in the jet mode. (F) Optical emission spectrum (OES) of the Ω mode without or with 2 mL min−1 of O2. (G) OES of the γ mode without or with 2 mL min−1 of O2. (H) OES of the jet mode.