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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.62: Poster

Tuesday, March 15, 2011, 18:30–22:00, P4

Cutting Carbon Nanotubes and Graphene — •Cornelius Thiele and Ralph Krupke — Institut für Nanotechnologie, Karlsruhe Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen

A new technique to locally oxidize carbon-based materials at the nanometer scale is presented. In an oxygen atmosphere, an electron beam is scanned across the material. Secondary electrons ionize the oxygen and induce oxidation around the focal point. Here the formation of trenches in graphene sheets and cuts across carbon nanotubes is shown. These gaps could provide means to contact single molecules. In-situ electrical measurements are used to characterize the cutting process.