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O: Fachverband Oberflächenphysik

O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)

O 42.34: Poster

Mittwoch, 25. März 2009, 17:45–20:30, P2

Growth of horizontally aligned carbon nanotubes on single crystalline surfaces — •Florian Szillat, Hans Kleemann, Philipp Zeigermann, Michael Blech, Mathias Steglich, and Bernd Schroeter — Universitaet Jena, Institut fuer Festkoerperphysik, Max-Wien-Platz 1, 07743 Jena, Deutschland

A controlled growth of aligned carbon nanotubes with particular structural and electronic properties at predefined positions is a prerequisite to utilize them in electronic or nanooptical devices. Alignment could be reached by applying electric fields during growth via chemical vapor deposition or by using single crystalline substrates. In the latter case the anisotropic arrangement of the surface atoms create an intrinsic electric field. An easy and fast way to analyze the crystallographic orientation of the substrate is the use of electron channeling pattern. The metal catalyst is deposited and prestructured at the substrate surface to support the aligned growth of CNTs. The carbon nanotubes are produced by catalytic chemical vapor deposition using ethanol or methane as precursor gas. The quality of these nanotubes is tested by raman and x-ray spectroscopy. Morphology and orientation of the nanotubes are characterized by scanning electron and atomic force microscopy.