Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)
O 41.107: Poster
Dienstag, 23. März 2010, 18:30–21:00, Poster B1
Modification of graphene by ion irradiation — •Hanna Bukowska1, Sevilay Akcöltekin1, Mourad El Kharrazi1, Orkhan Osmani1,2, and Marika Schleberger1 — 1Universität Duisburg-Essen, Fakultät für Physik, Lotherstraße 1, 47057 Duisburg, Germany — 2Technische Universität Kaiserslautern, Fachbereich Physik, Gottlieb-Daimler-Straße, Gebäude 47, 67663 Kaiserslautern, Germany
Ion irradiation can be used to modify surfaces on the nanometer scale. We investigate graphene on different insulator (SrTiO3, TiO2, and Al2O3) and semiconductor (SiO2) substrates. The bombardment of those target surfaces with swift heavy ions under grazing angle of incidence creates chains of nanodots on the substrate and folds graphene to typical origami-like structures. The shape of the folded graphene seems to depend on the length of the tracks. The length can be controlled by the angle of incidence. From the analysis of atomic force microscopy measurements, we classify the different types of modifications, with the aim to determine the relationship between chain length and origami shape. Further more we want to develop a theoretical understanding of the physical processes leading to the folding.