Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 19: Poster Monday: Organic Molecules on Inorganic Surfaces
O 19.10: Poster
Montag, 1. April 2019, 17:45–20:00, Poster F
Adsorption of organic molecules with high dipole moment on the Au(111) surface — •Tobias Müller1, Philipp Rietsch2, Siegfried Eigler2, and Bernd Meyer1 — 1Interdisciplinary Center for Molecular Materials and Computer-Chemistry-Center, FAU Erlangen-Nürnberg — 2Institute for Chemistry and Biochemistry, FU Berlin
Molecules with high dipole moment exhibit promising electronic properties for possible single-molecule electronic devices [1]. Of particular interest is how they couple to conducting substrates and how this coupling changes electronic states and intramolecular charge distribution.
To obtain first insights into the behavior of such high dipole molecules on a metallic substrate we have studied the adsorption of N2-Ethan-Tetracyanoquinodimethan and N2-Benz-Tetracyanoquinodimethan on a Au(111) surface using density functional theory (DFT). We have identified the preferred adsorption sites and molecular orientations on the surface and we determined possible periodic arrangements for dipolar stripes. Calculated scanning tunneling microscopy (STM) and local contact potential difference (LCPD) images will be presented and changes in the electronic structure of the molecules within the dipolar stripes will be discussed.
[1] P. Rietsch, F. Witte, S. Sobottka, B. Sarkar, B. Paulus, U. Resch-Genger, S. Eigler, Diaminodicyanoquinone: A Novel Class of Fluorescent Electron Acceptor Dyes with High Dipole Moments, submitted