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The adsorption of O 2 onto a dispersed (low coverage) phase of K on graphite has been characterized by X-ray photoemission and X-ray absorption spectroscopy. We identify two oxygen adsorption phases before physisorbed oxygen appears. The first species dominates at low O 2 exposures whereas the second one, which is probably due to oxygen adsorbed in a superoxo-like configuration (O...
Low-energy electron diffraction and electron energy-loss spectroscopy have been applied to study C60 thin films on a graphite substrate. Well-ordered C60 overlayers with close-packed face-centred cubic (fcc) (111) lattice structure have been prepared on graphite at 380K. Cooling of the C60 multilayers to 100K resulted in a (2×2) superlattice. This structure transformation has been identified as the...
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