Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 15: Solid-Liquid Interfaces 2: Structure and Spectroscopy
O 15.2: Vortrag
Montag, 5. September 2022, 15:30–15:45, S054
Self-assembly and thin film growth dynamics of an ionic liquid on Au(111) investigated in real space — Manuel Meusel1, Matthias Lexow1, Afra Gezmis1, Simon Schötz1, Margareta Wagner2, •Simon Jaekel1, Andreas Bayer1, Florian Maier1, and Hans-Peter Steinrück1 — 1Chair of Physical Chemistry II, University of Erlangen-Nürnberg (FAU), Germany — 2Institute of Applied Physics, Technical University of Vienna, Austria
Ionic liquids (IL) are organic salts with low melting points, often at or even below room temperature. They have shown promise as solvents and electrolytes, but have also become part of novel catalytical concepts involving solid metal catalysts.
In this context, our group studied the self-assembly and growth dynamics of thin films of 1,3-dimethylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([C1C1Im][Tf2N]) on the model surface of Au(111) using scanning probe microscopy[1,2,3]. Our experiments show that the film undergoes distinct phases between the growth of the wetting layer and subsequent multilayers. Further, 2D film growth is shown to be in competition with the growth of a metastable 3D droplet phase, with the dominant growth mode determined by a combination of temperature and nucleus formation.
[1] Meusel et al. ACS Nano 14 (2020) 9000-9010
[2] Meusel et al. Langmuir 36 (2020) 13670-13681
[3] Meusel et al. J. Phys. Chem. C 125 (2021) 20439-20449