Berlin 2015 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 18: Interfaces and Thin Films II (joint session with CPP)

DS 18.7: Vortrag

Dienstag, 17. März 2015, 15:45–16:00, C 243

Controlling Nanostructures by Templated Templates: Inheriting Molecular Orientation in Binary Heterostructures — •Tobias Breuer and Gregor Witte — AG Molekulare Festkörperphysik, Philipps-Universität Marburg, Deutschland

Precise preparation strategies are required to fabricate nanostructures of specific arrangement. In bottom-up approaches, where nano-structures are gradually formed by piecing together individual parts to the final structure, the self-ordering mechanisms of the involved structures are utilized. In order to achieve the desired structures regarding morphology, grain size and orientation of the individual moieties, templates can be applied, which influence the formation process of subsequent structures. However, this strategy is of limited use for complex architectures, as the templates only influence the structure formation at the interface between the template and the first compound. Here, we discuss the implementation of so-called templated templates and analyze, in which extent orientations of initial layers are inherited in top layers of another compound to enable structural control in binary heterostructures. To that purpose we have prepared crystalline templates of the organic semiconductors pentacene and perfluoropentacene in different exclusive orientations. We observe that for templates of both individual materials the molecular orientation is inherited in the top layers of the respective counterpart.