Berlin 2008 – scientific programme
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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 18.3: Poster
Monday, February 25, 2008, 18:30–19:30, Poster F
CVD synthesis of isolated carbon nanotube peapods on substrates — •Christian Spudat, Carola Meyer, and Claus Schneider — Research Centre Jülich, Institute for Solid State Research, Electronic Properties, 52425 Jülich
Carbon nanotubes filled with C60 Fullerenes, so-called ”peapods”, form a model system for studying one-dimensional molecular chains coupled to a ballistic conductor. C60 interacts only weakly with the surrounding SWCNT. Thus, small interactions such as phonon or spin coupling should be observable in transport measurements. In general, these peapods are synthesized by filling *bulk* material, and they are successively dispersed on a substrate from solution. The disadvantage of this method is that the nanotubes are rather short due to prior sonication and bundle together in ropes. Thus, characterisation of individual peapods including transport measurements is rather difficult. Clean and isolated SWCNTs for transport measurements can be grown using chemical vapour deposition. Here, we present a method to fill such SWCNTs with Fullerenes directly on substrates using vacuum filling in an evaporation chamber. We characterize the SWCNTs and peapods after each processing step using AFM, Raman and HRTEM. The main focus is the investigation of defects caused by thermal oxidation and the purification of the synthesized peapods.