Mainz 2026 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 21: Poster – Cluster and Nanoparticles (joint session MO/A)
MO 21.2: Poster
Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG
Tracking Microhydration of Salt Molecules in Helium Nanodroplets and Commissioning a New Nanoparticle Injector System — •Mikkel Mortensen1, Niklas Scheel2, Marcel Mudrich2, Henrik B. Pedersen2, and Ltaief B. Ltaief2 — 1Institute of Physics, Kassel University — 2Department of Physics and Astronomy, Aarhus University
The solvation of NaCl molecules in water, is an important process in chemistry. However, microscopic structures and energetics of the hydration complexes remain to be investigated. A recent study has quantified the number of water molecules needed, to form a complete hydration shell around NaCl in helium nanodroplets using Penning Ionization Electron Spectroscopy (PIES)[1]. Building upon this study, we investigate the microhydration dynamics of KBr, NaBr, and NaCl under comparable conditions at the XUV synchrotron light source, ASTRID 2. Our PIES measurements aim to investigate how different ionic constituents affect hydration structure and stability.
Furthermore, we are commissioning a new nanoparticle injector based on an aerodynamic lens system for producing aerosol beams of salt nanoparticles. This development will allow us to do experiments on salt hydration and electron spectroscopy in aerosols, including interactions with XUV radiation at ASTRID.
[1] L. B. Ltaief et al., submitted (2025), arXiv.2510.22000
Keywords: Nanodroplets; Penning Ionization; Aerosols; Synchrotron radiation; Electron Spectroscopy