Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)

O 59.15: Poster

Mittwoch, 24. März 2010, 17:45–20:30, Poster B1

Structural and electronic properties of Au induced nanowires on Ge(001) — •Tijs Mocking, Daan Kockmann, Arie van Houselt, Bene Poelsema, and Harold Zandvliet — MESA+ instute for Nanotechnology and University of Twente, Enschede, The Netherlands

The structural and electronic properties of Au induced self-organized nanowires on Ge(001), prepared by different procedures, are investigated with scanning tunnelling microscopy and spectroscopy at room temperature and 77 K [1]. The Au induced nanowires are comprised of dimers that have their bond aligned in a direction perpendicular to the nanowire. The dimers are buckled, leading to a 2x periodicity along the nanowires. Dimers located at anti-phase boundaries are dynamic and flip back and forth between two buckled configurations. The troughs between the nanowires have a depth of several atomic layers. Finally, the differential conductivities of the nanowires and the troughs are very comparable in magnitude.

[1]. D. Kockmann, A. van Houselt, T.F. Mocking, B. Poelsema and H.J.W. Zandvliet, Journal of Physical Chemistry C 113, 17156 (2009).