Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 61: Nanostructures at Surfaces III

O 61.8: Talk

Wednesday, April 2, 2014, 17:45–18:00, WIL B321

Molecule substrate registry on h-BN supported by Rh(111) — •Marcella Iannuzzi — Universität Zürich, Schweiz

Modern nano-templates based on hexagonal boron nitride or graphene grown on transition metals show potential for future applications, due to their outstanding mechanical, thermal, and electronic properties. The mismatch between the lattice constant of the sp2 overlayer and the substrate produces modulated structures, which act as nano-templates for self-assembly, electron confinement, or intercalation. We apply scanning tunneling microscopy and density functional theory to investigate the adsorption of molecules and the formation and dynamics of defects. This work focus on the site-selectivity of h-BN/Rh(111) (nanomesh) for the adsorption of hexaiodo-cyclo-hexaphenylene (I6-CHP) and H2-phthalocyanine. In both cases we observe the preferential absorption within the pore of the nanomesh and the preferential orientation with respect to the substrate. Furthermore, the significant effects on the molecular electronic properties due t the interaction with the substrate are discussed. Advanced sampling techniques and tuned analysis tools for the characterization lead to a better understanding of the interaction between the precursor molecule and the substrate, which could be exploited in the development of new structure and process, as the production of graphene derivatives on metal supported insulators.