Publications by authors named "Reimer Karstens"

We study interface properties of CoPcF and FePcF ( = 0 or 16) on niobium-doped SrTiO(100) surfaces using mainly X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. For all studied molecules, a rather complex, bidirectional charge transfer with the oxide substrate was observed, involving both the macrocycle and the central metal atom. For molecules of the first monolayer, an electron transfer to the central metal atom is concluded from transition metal 2p core level photoemission spectra.

View Article and Find Full Text PDF

Interface properties of iron phthalocyanine (FePc) and perfluorinated iron phthalocyanine (FePcF) on rutile TiO(100) and TiO(110) surfaces were studied using X-ray photoemission spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and low-energy electron diffraction (LEED). It is demonstrated that the interaction strength at the interfaces is considerably affected by the detailed preparation procedure. Weak interactions were observed for all studied interfaces between FePc or FePcF and rutile, as long as the substrate was exposed to oxygen during the annealing steps of the preparation procedure.

View Article and Find Full Text PDF