Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 64: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures IV
O 64.4: Vortrag
Mittwoch, 14. März 2018, 15:45–16:00, MA 004
Interaction of molecules with doped graphene via noncovalent interactions — •Bruno de la Torre1,2, Martin Svec1,2, Rabindranath Lo3, Pavel Jelinek1,2, Radek Zboril2, and Pavel Hobza2,3 — 1Regional Centre of Advanced Technologies and Materials, Palacký University, Olomouc, Czech Republic. — 2Institute of Physics of the CAS, Prague, Czech Republic. — 3Institute of Organic Chemistry and Biochemistry of the CAS, Prague, Czech Republic.
Chemical doping of graphene is an efficient way of tuning its intrinsic properties. In particular, implantation of a single-atom dopant [1,2] modifies graphene local electronic structure and consequently its chemical activity [3]. Understanding the interaction of molecules with individual dopants in graphene is of immense importance for development of graphene-based devices. We study the interaction of iron(II) phthalocyanine (FePc) with both pristine and N-doped graphene by means of cryogenic STM+AFM. While on pristine graphene the FePc forms regularly ordered self-assemblies, the presence of nitrogen dopants anchors FePc non-covalently, preventing their long-range ordering (see Fig.1). By STS and manipulation with the molecules we investigate how the proximity of the N-dopant affects the electronic states of a FePC molecule. The AFM high-resolution imaging with a CO-tip reveals a substantial charge redistribution within the molecule.
[1] M. Telychko et al. ACS Nano 8 (7), 7318 (2014), [2] A. Martin-Recio et al. Nanoscale 8, 17686 (2016) [3] M. Telychko et al. ACS Nano 9 (9), 9180 (2015)