Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 49: Poster: Nanostructures on Surfaces I
O 49.15: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster A
Studying surface interactions of molecular polyoxovanadate species for new electronic nanodevices — •Marco Moors1, Oliver Linnenberg2, Maria Glöß1,2, Aleksandar Kondinski2, and Kirill Monakhov1,2 — 1Forschungszentrum Jülich — 2RWTH Aachen
Polyoxovanadates (POVs) have already been for a long time in the focus of several experimental and theoretical studies due to their synthetic accessibility, versatile structural chemistry, and intriguing electronic and magnetic properties. The possible applications for POVs cover many different fields of interest ranging from catalysis to nanoelectronics. A very promising approach is hereby their implementation as redox active centers in resistive switching memory cells. However, one of the most important challenges for a technological integration of such molecular systems in real devices is the controlled deposition of single POVs on surfaces and their individual contacting.
In our recent study we investigate the deposition of [V18O42I]5- on Au(111) by droplet deposition from different solvents and by thermal deposition from the solid phase. This mixed-valent superkeggin-type POV is a perfect candidate for molecular switching experiments due to its several and easily addressable vanadium redox states. Depending on the deposition technique and parameters we are able to control the particle size on the surface ranging from small agglomerates over single molecules up to molecular fragments, which tend to recombine on the metallic substrate leading to new low-valent vanadium-oxo species.