Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 32: Oxides and Insulators: Clean Surfaces

O 32.7: Vortrag

Dienstag, 26. Februar 2008, 14:30–14:45, MA 042

Preparation of model single crystalline aluminium oxide films suitable for scanning tunnelling microscopy — •Sergiy Borodin and Michael Rohwerder — Max-Planck-Institut für Eisenforschung, Düsseldorf, Deutschland

Self assembly of organic molecules on aluminium or aluminium alloys is of increasing technical importance, e.g. for adhesion promotion and corrosion protection. For the performance of the SAMs in many cases their defect structure is of importance. However, it is difficult to obtain detailed information about the nanoscopic defect structure, as it is difficult to prepare suitable atomically flat samples that can be scanned by STM.

In this work a model thin film aluminum has been prepared under UHV conditions, whose surface is suitable for a scanning tunneling microscopy investigation, e.g. of phosphonate self-assembly on aluminium. This surface is stable even upon contact at high water exposures and hence much superior to model aluminium oxide surfaces prepared on NiAl.