Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 18: Poster Session I - MA 141/144 (Atomic Wires; Size-Selected Clusters; Nanostructures; Metal Substrates: Clean Surfaces+Adsorption of Organic / Bio Molecules+Solid-Liquid Interfaces+Adsorption of O and/or H; Surface or Interface Magnetism; Oxides and Insulators: Clean Surfaces)
O 18.70: Poster
Montag, 25. Februar 2008, 18:30–19:30, Poster F
Fabrication of Cobalt clusters by pulsed laser deposition — •Markus Trautmann, Christian Pansow, Matthias Büenfeld, Veit Große, Frank Schmidl, and Paul Seidel — Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Helmholtzweg 5, D-07743 Jena
Besides Fe and Ni (and different Fe-/Ni-compounds) Co is a catalyst material used in synthesis of carbon nanotubes (CNTs). Clusters can be formed for example by annealing of thin Co films which are usually produced by sputtering technique or electron beam evaporation. To get applicable clusters for the growth of CNTs thin films of about 1 nm are required. In this work we use pulsed laser deposition (PLD). This method enables low deposition rates of less than 0,04 monolayers per pulse using a 99,99 % Co target and a KrF excimer laser. We present our experimental set up for PLD under different vacuum conditions to produce Co layers on SiO2-coated Si-substrates. First results of surface and film analysis using different methods as atomic force microscopy (AFM), x-ray diffraction (XRD), scanning electron microscopy (SEM) and Auger electron spectroscopy (AES) will be presented.