Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 43: Poster Session II - MA 141/144 (Surface Spectroscopy on Kondo Systems; Frontiers of Surface Sensitive Electron Microscopy; Methods: Scanning Probe Techniques+Electronic Structure Theory+Other; Time-Resolved Spectroscopy of Surface Dynamics with EUV and XUV Radiation; joined by SYNF posters)

O 43.30: Poster

Dienstag, 26. Februar 2008, 18:30–19:30, Poster F

Design of a vacuum system for the local study of molecules — •Matthias Prostak, Germar Hoffmann, and Roland Wiesendanger — Institute of Applied Physics, University of Hamburg

Molecules are a fascinating class of materials and have a large potential impact for the design of novel, molecule-based devices. One major advantage is the possibility of low temperature preparation in industrial processes. Therefore, the precise control of growth parameters is relevant for the preparation of clean and homogeneous molecular structures.

Here, we will present the design of a new, very versatile and compact vacuum system for such a preparation study. The vacuum system is equipped with a scanning tunneling microscope, a LEED optics and an Auger spectrometer for surface analysis. In this vacuum system, flexible exchange of molecule evaporators through the load-lock and the preparation of metal-insulator-molecule sandwiches is possible. Since commercially available samples of molecules are often not sufficiently clean for high-quality investigations, the vacuum system is additionally equipped with an extra side chamber to degas molecular samples for purification over several hours and days. We will discuss the design and the first realization.