“…3e,f). Hydrocarbon species, aromatic species, and small oxygen-containing organic ions, including C -, CH -, C2 -, C2H -, C3 -, C4 -, C4H -, C5H -, C7H -, CN -, and CNOwere observed as well, as previously seen by others, [26][27][28] indicating the presence of graphene oxide and BSA (Fig. 3g,h).…”