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Earth, Planets and Space
Figure 2 | Earth, Planets and Space

Figure 2

From: X-ray absorption near edge structure spectroscopic study of Hayabusa category 3 carbonaceous particles

Figure 2

Carbon K edge-XANES spectra of RA-QD02-0120 and RB-QD04-0047-02. C-XANES spectra of RA-QD02-0120 before and after TEM observations (RA-before and after TEM) and two different regions (R1 and R2 in Figure 1) of RB-QD04-0047-02 (RB). The peaks assigned include the following: 1 s-π* transition of aromatic/olefinic carbon (C = C) at 285.1 eV; 1 s-π* transition of vinyl-keto (C = C-C = O), nitrile (C ≡ N) and/or nitrogen heterocycles (C-N = C) at 286.7 eV; and 1 s-π* transition of carboxyl carbon (COOH) at 288.2 eV.

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