Regensburg 2004 – wissenschaftliches Programm

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O: Oberflächenphysik

O 28: Postersitzung (Elektronische Struktur, Grenzfläche fest-flüssig, Halbleiteroberflächen und -grenzflächen, Magnetismus und Symposium SYXM, Methodisches, Nanostrukturen, Oberflächenreaktionen, Teilchen und Cluster, Zeitaufgelöste Spektroskopie)

O 28.43: Poster

Mittwoch, 10. März 2004, 16:00–19:00, Bereich C

Nanostructures as a result of the thermal instability of metal thin films on insulators — •Torsten Kolb, Dominik Enders, Annemarie Pucci, and Gerhard Fahsold — Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, D-69120 Heidelberg

We investigate the possibility of structuring metal thin films on a nanoscale by exploiting their thermal instability. Various metal thin films (Cu, Au, Fe) were deposited on different substrates (MgO, SiO₂) and subsequent annealing processes were applied for fractioning these films. For in-situ and online analysis of this fractioning we use infrared spectroscopy, which we perform during annealing in UHV. Measuring IR transmission enables investigation of both dynamics and energetics (critical temperatures) of the processes caused by the thermal instability of metal thin films. Their morphological properties were characterized ex-situ by atomic force microscopy (AFM). The dependence of the resulting morphology on annealing temperature and crystalline structure will be demonstrated.