Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 97: Nanostructures at Surfaces: Molecular Systems II
O 97.3: Vortrag
Donnerstag, 23. März 2017, 16:00–16:15, REC/PHY C213
Self-assembly of cyano and pyridil functionalized molecules on epitaxial h-BN and metal supports — •Domenik M. Zimmermann1, Knud Seufert1, Jiri Klivar2, Gael Amans2, Irena G. Stará2, Ivo Starý2, Luka Dordević3, Tomas Marangoni3, Davide Bonifazi3, Johannes V. Barth1, and Willi Auwärter1 — 1E20, Technische Universität München, Germany — 2Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Czech Republic — 3Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
Functionality at the nanoscale is based on both, intrinsic properties of the basic building blocks like molecules or atoms and their modification due to interaction with the environment.
One such building block is helicene, an ortho-condensed polycyclic aromatic compound. Di-cyano, di-benzo functionalized helicenes feature a large in-plane dipole moment, favoring the formation of 1D chains along the high symmetry directions of a Ag(111) surface. In contrast the molecules assemble into large two-dimensional islands upon adsorption on h-BN/Cu(111). Another example is pyrene. Pyridil functionalized derivatives have shown distinct self-assembled structures, including arrays and kagome heterostructures[1]. On h-BN/Cu(111) these architectures can be electronically decoupled. Scanning tunneling spectroscopy is used to address their electronic properties to pave the way for potential optoelectronic applications.
[1] T. Kaposi et al., ACS Nano 10, 7665 (2016).