Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 20: Poster Monday: Solid-Liquid Interfaces

O 20.11: Poster

Montag, 5. September 2022, 18:00–20:00, P4

Imaging and Illumination of Self-Assembled Molecules at Solid and Liquid Interfaces — •Bensu Günay, •Shilpa Panchami Raj, Christophe Nacci, and Leonhard Grill — University of Graz

Nanotechnological approaches for photochemical on-surface synthesis of covalently-bonded nanostructures have received recent attention at solid/air and solid/liquid interfaces. At the solid/liquid interface, there is in principle always a dynamic equilibrium between the molecules adsorbed on the surface and those still dissolved in the supernatant solution. Additionally, on-surface photochemical activation of chemical reactions provides new reaction pathways and enables the formation of long-range ordered covalent structures. The scanning tunneling microscope (STM) is a powerful tool for observing such structures at surfaces. In this study we present STM measurements under ambient pressure and at room temperature at the solid/liquid interface. In a first step for investigating photoactivated polymerisation under such conditions, 2,5-didodecyl-1,4-di-1-propenyl benzene was introduced onto a highly oriented pyrolytic graphite (HOPG) surface. We report on the self-assembled structures as well as attempts for photochemical activation using various wavelengths at room temperature.