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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 18.61: Poster

Montag, 25. Februar 2008, 18:30–19:30, Poster F

Growth and characterization of single-wall carbon nanotubes for electronic and optical applications — •Hans Kleemann, Philipp Zeigermann, Michael Blech, Mathias Steglich, and Bernd Schröter — Universität Jena, Institut für Festkörperphysik, Max-Wien-Platz 1, 07743 Jena, Deutschland

A controlled growth of carbon nanotubes with particular structural and electronic properties at predefined positions on solid substrates is a prerequisite to utilize them in electronic or nanooptical devices. We grow single-wall nanotubes by thermal chemical vapour deposition (CVD) on various substrates like silicon, fused silica and sapphire as well as on silicon carbide. Metal films are vacuum-evaporated to catalyze the growth of high-purity single-wall nanotubes by CVD using methane as precursor gas. The quality of nanotubes is tested by raman and x-ray spectroscopy: residual catalyst amount and contamination is in general lower than the detection limits of these techniques. The morphology and orientation of the nanotubes is characterized by scanning electron and atomic force microscopy. A preferred orientation is observed on the (single-crystalline) surface of sapphire.