“…As shown in Figure S2, there are many active species (e.g., N 2 , N 2 + , Ar, OH, O 2 + , and H) formed in the plasma jet. 23,24,31 Noted that the emission lines at 265.5, 314.8, 336.0, 357.3, and 477.3 nm (Figure S2a) are attributed to the ionized N 2 arising from the ambient air. 25 The emission signals at 307.8, 380.1, 406.6, and 429.1 nm are derived from OH, N 2 + , H, and O 2 + , respectively, and the spectrum near 550 and 617.8 nm including the region of 700− 800 nm in Figure S2b is dominated by Ar peaks, as well as the detected O line at 774 nm.…”