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O: Fachverband Oberflächenphysik
O 56: 2D Materials beyond Graphene
O 56.13: Poster
Dienstag, 21. März 2017, 18:30–20:30, P2-EG
Nanostructuring 2D Materials by Ion Irradiation — •Andre Maas1, Roland Kozubek1, Lukas Madauß1, Ursula Ludacka2, Mukesh Kumar Tripathi2, Henning Lebius3, Marko Karlusic4, Jani Kotakoski2, and Marika Schleberger1 — 1Universität Duisburg and Cenide, Fakultät für Physik, 47048 Duisburg, Germany — 2Universität Wien, Boltzmanngasse 5, 1090 Vienna, Austria — 3CIMAP, (CEA-CNRS-ENSICAEN-UCN), blvd Henri Becquerel, F-14070 Caen, France — 4Ruder Bošković Institute, Bijenićka cesta 54, 10000 Zagreb, Croatia
To fully exploit the colossal technological potential of 2D materials, methods to introduce defects in a controlled way are a key factor. We have investigated energetic ion irradiation induced defects and nanostructures in 2D materials like graphene and single layer MoS2. We show that apart from the well-known binary collisions caused by singly charged keV projectiles, the dense electronic excitation triggered by highly charged ions as well as swift heavy ions may be used to create various characteristic nanostructures each of which may be fabricated by choosing the proper irradiation conditions.
Our experiments, including optical spectroscopy techniques and atomic resolution STEM, reveal unique morphologies such as closed bilayer edges with a given chirality, nanopores of round shape as well as chemical modifications like hydrogenation of the 2D material. By controlled variation of ion parameters like kinetic energy, charge state, angle of incidence, etc., this wide spectrum of modifications in 2D materials can be accessed.