SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 14: Poster Session I: Nanostructures at surfaces I
O 14.8: Poster
Montag, 1. März 2021, 10:30–12:30, P
Nano-hillock formation on CaF2 due to individual slow Au-cluster impacts — •Gabriel L. Szabo1, Markus Lehner1, Lothar Bischoff2, Wolfgang Pilz2, Ulrich Kentsch2, Friedrich Aumayr1, Nico Klingner2, and Richard A. Wilhelm1 — 1TU Wien, Institute of Applied Physics, 1040 Vienna, Austria — 2Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
Ion-irradiation of surfaces was found to be a very powerful technique for surface modifications on a large amount of technologically relevant materials. Especially the formation of nanostructures, such as iontracks and nano-hillocks, which are mediated by electronic excitation induced by slow highly charged ions and swift heavy ions received lots of interest in recent years. For those experiments, the ionic crystal CaF2 was a model system for the underlying processes. We use the same model system here, but a more direct way of creating nanohillocks by heavy cluster irradiation. In our investigations we show the formation of nano-hillocks by slow individual Au-cluster-irradiation on CaF2(111) surface that are very similar to hillocks iobserved previously with highly charged ions. We show that the size of the hillocks can be tuned by the cluster size.