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. 2016 Jun 14;6:27872. doi: 10.1038/srep27872

Figure 3. Emission spectra of different plasmas as detected by spectroscopy.

Figure 3

(A) Schematic of the spectroscopy experimental setup. (B) The emission spectra of Ar, Ar + H2O, Ar + N2 and Ar + O2 plasmas are shown; certain unique spectral lines (OH, N2) are marked.