Dresden 2006 – scientific programme

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O: Oberflächenphysik

O 14: Poster session I (Adsorption, Epitaxy and growth, Phase transitions, Surface reactions, Organic films, Electronic structure, Methods) (sponsored by Omicron Nanotechnology GmbH)

O 14.9: Poster

Monday, March 27, 2006, 18:00–21:00, P2

Development of an in-situ exchangeable inert Shapal-M-based molecule evaporator — •Knud Lämmle, Alexander Schwarz, and Roland Wiesendanger — Institute of Applied Physics, University of Hamburg, Jungiusstr. 11, D-20355 Hamburg

We describe the development of an in-situ exchangeable evaporator and the required peripheral equipment for the preparation of organic molecules on clean substrates in an UHV environment. The evaporator is mounted on a transfer shuttle compatible with an existing Omicron chamber system. The crucible is made of Shapal-M, a machinable ceramic with a high thermal conductivity as well as a high mechanical stress resistivity and therefore much better suited than other non-metallic materials normally used like alumina, boron nitride or vitreous carbon. It is heated by a tungsten filament, which is wound directly around the Shapal-M cylinder. For precise temperature regulation, a thermocouple is integrated into the crucible. Moreover, the evaporation rate can be monitored by a quartz crystal microbalance. In order to manipulate the growth mode of the molecular thin films, the sample stage is equipped with a thermocouple controlled heating unit.