Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 10: Gaede Prize Talks

DS 10.2: Preisträgervortrag

Dienstag, 6. September 2022, 10:20–10:50, H17

Slow highly charged ions as a tool for monolayer sensitive nano-engineering — •Richard Wilhelm — TU Wien, Institute of Applied Physics, Vienna, Austria — Laureate of the Gaede-Prize 2021

Heavy ions in high charge states can be prepared with kinetic energies in the keV energy range. These slow ions interact with surface electrons upon impact of a material which leads to their neutralisation and consequently to the deposition of several ten keV of potential energy. Over the past 20 years it has been a puzzle how fast and consequently how surface sensitive this energy deposition is. With the use of freestanding two-dimensional materials we can now limit the interaction time of the ions with a solid to the femtosecond regime. We find that most of the neutralisation of the ions takes place in a single atomic monolayer of material. In this contribution I will discuss recent advancements in the study of ion neutralisation dynamics inside of solids as well as the efficiency of potential energy driven sputtering of atoms. The latter depends on the type of material and can be confined to a single monolayer only, despite the high amount of deposited energy.