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O: Fachverband Oberflächenphysik

O 20: Poster: Spins and Magnetism at Surfaces

O 20.8: Poster

Monday, March 27, 2023, 18:00–20:00, P2/EG

Electrospray deposition for STM sample preparation in UHV — •Caroline Hommel, Lukas Spree, Dasom Choi, Luciano Colazzo, and Andreas Heinrich — Center for Quantum Nanoscience, 52 Ewhayeodae-gil, Daehyeon-dong, 03760 Seoul, South Korea

Lanthanide single molecule magnets are promising materials for future spintronics applications, such as ultrahigh density memory devices. Using several methods, we have succeeded in synthesizing different double-decker phthalocyanine complexes (M-Pc2; M = Y, Er, Tb) and depositing them on a metal substrate in ultra-high vacuum (UHV) for scanning tunneling microscopy (STM) analysis. Due to their flat geometry they are very well suited for surface deposition. Based on the very well-known chemical properties of the phthalocyanine ligands, it is possible to functionalize them for various purposes. M-Pc2 form ordered structures on the surface, which could be further enhanced by long chain alkane groups on the phthalocyanine ligands. However, such large organic molecules cannot be sublimated without fragmentation. Using electro spray deposition (ESD), thin films of thermally unstable molecules can be deposited directly in UHV. Various parameters, such as pressure, time, and solvent play a role in this process. The influence of the parameters on the deposition will be investigated for M-Pc2 molecules and their chemical derivatives.