Berlin 2012 – scientific programme

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DS: Fachverband Dünne Schichten

DS 38: Poster III: Resistive switching (jointly with DF, KR, HL); Thermoelectric materials (Focused session); Micro- and nanopatterning (jointly with O); Ion irradiation effects

DS 38.46: Poster

Thursday, March 29, 2012, 17:30–19:00, Poster E

Modification of diamond-like carbon by ion irradiation — •Hanna Bukowska¹, Benedict Kleine Bußmann¹, Dirk Walecki¹, Florian Meinerzhagen¹, Marc Brötzmann², Hans-Gregor Gehrke², Hans Hofsäss², and Marika Schleberger¹ — ¹Universität Duisburg-Essen, Fakultät für Physik, Lotherstraße 1, 47057 Duisburg, Germany — ²Universität Göttingen, Fakultät für Physik, Bunsenstraße 13, 37073 Göttingen, Germany

Diamond-like carbon (DLC) films were irradiated with swift heavy ion beams of varying energy and angles of incidence. The irradiation created electrically conducting tracks in the DLC-films by transforming sp³ into sp² bonds. The DLC-films were analyzed by conductive atomic force microscopy. The images were used to identify ion impact sites, and I-V-Spectroscopy was applied to determine the conductivity of the tracks. High energy ions (2,2 GeV, Au²⁵⁺) created tracks with ohmic conductivity in the case of perpendicular bombardment, whereas grazing irradiation results in tracks that show mainly tunneling behavior. Low energy ions (100 MeV, Xe²³⁺) created tracks which exhibit tunneling behaviour after perpendicular incidence irradiation, but irradiation under 1^∘ did not result in conductive tracks.