SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 28: Organic Molecules on Inorganic Substrates III: Adsorption and Growth I

O 28.9: Vortrag

Dienstag, 28. März 2023, 12:30–12:45, CHE 89

Variable Temperature Scanning Tunneling Microscopy Investigation on Pyrene Monolayers — •Patrick Penner, Xianghui Zhang, Berthold Völkel, and Armin Gölzhäuser — Physik Supramolekularer Systeme und Oberflächen, Universität Bielefeld, Bielefeld, Germany

Pyrene (C16H10) monolayers were prepared by physical vapor deposition on Au(111). Afterwards they were investigated with a variable temperature scanning tunneling microscope with the capability to cool the surface down to -80°C. Without prior cooling, it was impossible to image any molecules at room temperature. After reaching a temperature of 10°C first images could be made. Independent of the temperature the molecules seem to be lying flat on the sample, with a next-neighbor distance of 1.05 nm. After cooling down it was possible to scan at room-temperature small domains of pyrenes near edges of gold terraces, as well as single mobile pyrene molecules.