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. 2014 Oct 6;111(43):15338–15343. doi: 10.1073/pnas.1408206111

Fig. 4.

Fig. 4.

UltraSTEM images and corresponding EEL spectra of grains from both studied IDPs. (A) HAADF image of the irregular grain 8 from IDP AK5, which is enclosed by a large Fe sulfide to the right and Pt to the left. (B) HAADF image of the blocky grain 11 from IDP AK5 enclosed by Au and Pt from the substrate and preparation, respectively. (C) HAADF image of the irregular organic grain 09 from IDP AK6 with higher Z-contrast material (Pt from FIB preparation and/or Au from the substrate) penetrating the grain. (D) HAADF image of the grain 09b from IDP AK6 sandwiched between the Pt cover (upper right) and the Au substrate (lower left) as well as diverse silicates in the direct vicinity. (E) Extracted stacked EEL spectra of all IDP grains with distinct bands around the C–K edge again marked (Table S2). The two characteristic IOM-like bonding environments at ∼285 eV and ∼286 eV are clearly visible in all spectra, together with a small peak at ∼287 eV.