Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 39: Poster: Metal Substrates

O 39.1: Poster

Dienstag, 19. März 2024, 18:00–20:00, Poster D

Chemisorption and diffusion of fluorocarbon compounds on Ag(110) — •Shilpa Panchami Raj, Matthew Timm, and Leonhard Grill — University of Graz

The chemisorption and diffusion of molecules adsorbing at metal surfaces are key processes in heterogeneous catalysis [1]. In this work, we present a scanning tunnelling microscopy (STM) study under ultrahigh vacuum (UHV) of the deposition of CF3I on the anisotropic Ag(110) surface. Experiments were done at cryogenic temperatures of 5 K, which allows imaging single molecules in a stable fashion and also to manipulate them with the tip of the microscope in a controlled way. Dissociative chemisorption of CF3I on Ag (110) was observed and studied in dependence on the sample temperature. Moreover, first attempts will be presented of how diffusion of individual molecules can be induced in a controlled way.

[1] G. Ertl, Angew. Chem. Int. Ed. 47, 3524 (2008)

Keywords: Scanning Tunneling Microscopy; On-surface reaction dynamics; Manipulation of molecules; Ag(110); chemisorption