Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: 2D Materials III: Nanomembranes, hBN, and Particle Interactions
O 59.7: Vortrag
Mittwoch, 3. April 2019, 16:45–17:00, H16
Charge exchange between highly charged ions and 2D materials — •Sascha Creutzburg1,2, Janine Schwestka3, Mukesh K. Tripathi4, Heena Inani4, René Heller1, Nico Klingner1, Anna Niggas3, Tibor Lehnert5, Robert Leiter5, Roland Kozubek6, Stefan Facsko1, Ute Kaiser5, Jani Kotakoski4, Marika Schleberger6, Friedrich Aumayr3, and Richard A. Wilhelm1,3 — 1Helmholtz-Zentrum Dresden-Rossendorf, Ion Beam Center, Dresden, Germany — 2TU Dresden, Germany — 3TU Wien, Institute of Applied Physics, Vienna, Austria — 4University Vienna, Faculty of Physics, Austria — 5Ulm University, Central Facility of Electron Microscopy, Ulm, Germany — 6University Duisburg-Essen, Faculty of Physics and CENIDE, Duisburg, Germany
The neutralisation of ions due to their interaction with matter deals with fundamental aspects of ion-solid interaction, e.g.: How does the kinetic energy loss depend on the charge exchange? In order to investigate the neutralisation behaviour, classical ion beam foil experiments were performed using ultimately thin 2D materials as target. Because of their low thickness, an ion with a sufficiently high incident charge state does not reach charge equilibrium, which enables the measurement of the non-equilibrium exit charge state distribution. The influence of target material properties on the charge exchange is investigated for 2D materials consisting of graphene, MoS2 and hBN, which show different band gap energies between 0 and 6 eV, conductance properties (metallic, semi-conducting and insulating) and layer structures.