Spectromicroscopy of C-60 and azafullerene C59N: Identifying surface adsorbed water - Archive ouverte HAL Access content directly
Journal Articles Scientific Reports Year : 2016

Spectromicroscopy of C-60 and azafullerene C59N: Identifying surface adsorbed water

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Abstract

C fullerene crystals may serve as important catalysts for interstellar organic chemistry. To explore this possibility, the electronic structures of free-standing powders of C and (CN) azafullerenes are characterized using X-ray microscopy with near-edge X-ray adsorption fine structure (NEXAFS) spectroscopy, closely coupled with density functional theory (DFT) calculations. This is supported with X-ray photoelectron spectroscopy (XPS) measurements and associated core-level shift DFT calculations. We compare the oxygen 1s spectra from oxygen impurities in C and CN, and calculate a range of possible oxidized and hydroxylated structures and associated formation barriers. These results allow us to propose a model for the oxygen present in these samples, notably the importance of water surface adsorption and possible ice formation. Water adsorption on C crystal surfaces may prove important for astrobiological studies of interstellar amino acid formation.

Dates and versions

hal-01395474 , version 1 (10-11-2016)

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Cite

Dogan Erbahar, Toma Susi, Xavier Rocquefelte, Carla Bittencourt, Mattia Scardamaglia, et al.. Spectromicroscopy of C-60 and azafullerene C59N: Identifying surface adsorbed water. Scientific Reports, 2016, 6 (1), pp.35605. ⟨10.1038/srep35605⟩. ⟨hal-01395474⟩
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