The interface between chloroaluminum phthalocyanine and titanium dioxide: the influence of surface defects and substrate termination.

Interface properties of chloroaluminum(iii) phthalocyanine (AlClPc) on two different rutile titanium dioxide (TiO2) single crystal surfaces ((100) and (001)) have been studied using X-ray and ultraviolet photoemission spectroscopy (XPS and UPS). It is shown that the strength of the interaction clearly depends on the substrate termination and preparation. Generally, the (001) surface is more reactive compared to the (100) surface.

FePc and FePcF on Rutile TiO(110) and (100): Influence of the Substrate Preparation on the Interaction Strength.

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.

Communication: Influence of graphene interlayers on the interaction between cobalt phthalocyanine and Ni(111).

The influence of graphene interlayers on electronic interface properties of cobalt phthalocyanine on Ni(111) is studied using both photoemission and X-ray absorption spectroscopy. A charge transfer associated with a redistribution of the d-electrons at the Co-atom of the phthalocyanine occurs at the interface to Ni(111). Even a graphene buffer layer cannot prevent the charge transfer at the interface to Ni(111); however, the detailed electronic situation is different.