Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 55: Graphene
O 55.14: Poster
Dienstag, 21. März 2017, 18:30–20:30, P2-EG
Intercalated porphines at the BN/Cu(111) interface: structure, electronic properties and function — •Jacob Ducke1, Alexander Riss1, Alejandro Pérez Paz2, Angel Rubio3, Johannes V. Barth1, and Willi Auwärter1 — 1Physik-Department E20, Technische Universität München, 85748 Garching, Germany — 2ETSF, Universidad del País Vasco, 20018 San Sebastián, Spain — 3Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
The technological applicability of surface-supported molecular materials is often restricted by their limited stability. While covalent bonding can potentially enhance thermal stability, many of the currently researched molecular functionalities are sensitive to and impaired by the gaseous or liquid environment.
In this work we present the fabrication of heterostructures consisting of porphines that are sandwiched between a copper surface and an insulating BN monolayer. Due to the electronic transparency of the BN layer, the intercalated molecules can be characterized and manipulated using scanning tunneling microscopy (STM). While the presence of the capping BN layer influences the self-assembly, we show that intrinsic molecular functionalities as switching between different tautomers or self-metalation are preserved. Such metal/molecule/insulator structures provide an opportunity to protect organic materials from atmospheric pressure, and might also be used to control chemical reactions through geometric confinement.