Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Surface Science: Misc.
O 58.1: Poster
Dienstag, 21. März 2017, 18:30–20:30, P2-EG
Effect of the sub-surface on the surface revealed by Scanning Probe Microscopy on irradiated graphitic surfaces — •Cem Kincal1, Dilek Yildiz1,2, Umut Kamber1, Clara Grygiel3, Cornelis J. van der Beek4, and Oğuzhan Gürlü1 — 1Istanbul Technical University, Istanbul, Turkey — 2University of Basel, Basel, Switzerland — 3Université dé Caen, Caen, France — 4Ecole Polytechnique, Palaiseau, France
Comet-like and hillock like structures on swift heavy ion (SHI) irradiated HOPG surfaces have already been reported. We have shown that it is possible to obtain atomic resolution on the tail section of the comet-like structures with STM. Such STM data proved that the interaction of SHI with the bulk does not damage surface layers except for the entry point. Friction force microscopy showed complementary results to our STM measurements. Interestingly, we observed that the tail sections of the comet-like structures appeared on the friction maps, although they could not be observed in simultaneously taken topography maps. Intriguingly, tail sections showed less friction compared to the pristine HOPG surface. Our results indicate the friction between two surfaces can also be a function of the bulk material. Moreover, we have studied SHI irradiation of moiré zones formed on HOPG. Data revealed that irradiation of moiré zones under grazing incidence did not show any unzipping or folding of the top most graphene layer generating the moiré pattern.