Fig. 4
From: Amide groups in 3.7 billion years old liquid inclusions
ToF-SIMS images of liquid inclusion residue. The inclusion residue (cf. Supplementary Fig. S1b for optical photomicrograph) can be made out in the high spatial resolution total ion map (a)—note that the two right-most lobes observed in Supplementary Fig. S1b are not discernible on the ToF-SIMS map. High mass resolution (low spatial resolution) ion maps (same area as in a) shown a CxHy contaminant signal covering the surface indiscriminately (b), while CxHyOz+ species (c) and NOx+ species (d) are observed in the inclusion residue only. The intensity variation in (b) is reflecting the topography of the surface, with areas closer to the extractor yielding higher secondary ion counts.
