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O: Fachverband Oberflächenphysik

O 17: Poster Session I (Nanostructures at Surfaces; Metal Substrates: Epitaxy and Growth; Methods: Scanning Probe Techniques; Phase Transitions)

O 17.4: Poster

Montag, 26. März 2007, 17:30–20:30, Poster C

Optical properties of self-assembled Pb nanowires on Si(335)/Au — •M. Klevenz, M. Möller, F. Neubrech, R. Lovrincic, and A. Pucci — Kirchhoff-Institut für Physik, Heidelberg

A macroscopic array of aligned lead nanowires was produced by molecular beam epitaxy on a vicinal Si(335)/Au surface under UHV conditions. The optical properties of this system were studied by infrared spectroscopy and reflection of light in the visible range. We were able to observe a phase transition and to characterize the nanostructure during the whole growth process. This was possible due to the observation of excited resonances in the wires which provide an insight into their size. The measurements were performed at different temperatures. Temperature dependent diffusion properties of the lead atoms lead to differences in the wire shape and size.