Showing papers by "Karsten Horn published in 2017"
TL;DR: This work uses the situation, unique to graphene, to characterize the unoccupied valence band states of the partners in the bond on the basis of the complementary adsorbate and substrate X-ray absorption K edges.
Abstract: While the bonding of molecular adsorbates to graphene has so far been characterized as physisorption, our study of adsorbed ammonia and water using near-edge X-ray absorption spectroscopy provides unambiguous evidence for a chemical contribution to the adsorption bond. We use the situation, unique to graphene, to characterize the unoccupied valence band states of the partners in the bond on the basis of the complementary adsorbate and substrate X-ray absorption K edges. New adsorbate-induced features on the substrate (carbon) K edge are interpreted as hybrid states in terms of a simple model of chemical interaction.
25 citations
TL;DR: In this paper, angle-resolved valence band and core level photoemission data are shown to derive from Ag(111) interface and bulk states in the silicene monolayer and from the well-known Ag- ( 3 × 3 ) R30 ° -Si(111), structure in Si multilayers.
14 citations
TL;DR: In this article, near-edge x-ray absorption fine structure spectra of the cis-and trans-isomers of stilbene in the gas phase reveal clear differences, which are analyzed by results from density-functional theory calculations using the transition potential approach.
8 citations