SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 38: Poster: Organic Molecules on Inorganic Substrates II

O 38.7: Poster

Dienstag, 28. März 2023, 18:00–20:00, P2/EG

Implementation of a silicon wafer into an UHV STM system for low temperature molecular depositions — •Ken Kolar, Grant Simpson, Christophe Nacci, and Leonhard Grill — Uni Graz, Graz, Austria

Sublimation temperatures of organic molecules typically rise as the number of constituting atoms is increased. This can lead to fragmentation and other experimental difficulties during molecular deposition if a standard sublimation Knudsen cell is used. One of the possibilities to overcome this problem is the deposition of molecules using the "energy sudden" sublimation from a silicon wafer. We have installed such a system in our ultrahigh vacuum chamber and used it for depositions onto the sample that is kept at cryogenic temperatures during the preparation. Here, we present how such a device was implemented in our setup, together with first scannning tunneling microscopy (STM) images of the test depositions.