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O: Fachverband Oberflächenphysik

O 19: Poster Session II: Organic molecules on inorganic substrates: Adsorption and growth II

O 19.6: Poster

Monday, March 1, 2021, 13:30–15:30, P

Adsorption of organic molecules on the Cu(110)-(2x1)O stripe phase — •Ilias Gazizullin, Christophe Nacci, and Leonhard Grill — Physical Chemistry Department, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria

The deposition of molecules onto single-crystal surfaces allows their investigation at the single-molecule level by scanning tunneling microscopy (STM), in particular for planar molecular structures. Here, we have studied flat dibromoanthracene (DBA) molecules on the Cu(110)-(2x1)O stripe phase under ultra-high vacuum conditions with low-temperature STM. The Cu(110)-(2x1)O stripe phase is of particular interest since it offers alternating stripes of (metallic) Cu(110) areas and of oxygen-covered copper areas where the molecules are slightly decoupled from the metal substrate. The focus of our study is first on the preferred adsorption configuration and orientation of the linear molecules on the surface. It turns out that the molecules form organometallic chains on the copper areas, oriented in two surface directions. Second, we have attempted to investigate the electronic structure of the molecules by comparing their adsorption when they are on the metallic areas or on the oxide stripes. The results are compared with calculations of the molecular orbital structure.