Berlin 2012 – scientific programme
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SYRS: Symposium Resistive Switching
SYRS 2: Poster: Resistive switching (jointly organized by DS, DF, KR, HL)
SYRS 2.46: 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.