Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster – Cluster and Nanoparticles (joint session MO/A)
A 25.7: Poster
Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG
HHG Coherent Diffraction Imaging of water nanodroplets — •José Gómez Torres1, David Biner1, Constantin Koch1, Indrani Dey1, Frederic Ussling1, Linos Hecht1, Yves Acremann1, Isabelle Bollier1, Alessandro Colombo1, Ehsan Hassanpour1, Katharina Kolatzki1, Changji Pan1, Mario Sauppe1, Lea Schüpke1, Björn Senfftleben1, Hanchao Tang2, Arnab Choudhury2, Bruce Yoder2, Ruth Signorell2, and Daniela Rupp1 — 1D-PHYS, ETH Zürich — 2D-CHAB, ETH Zürich
Homogeneous freezing of free-flying water droplets of 1μm radius and smaller remains largely not understood due to the resolution limit of optical imaging. A change in freezing dynamics is expected in respect to droplets over 10μm [1], but no experimental study has confirmed this. Ice nucleation rates are also uncertain, with previous studies not agreeing on a compatible value [2]. Using intense XUV pulses from our tabletop HHG source, we obtain single-shot diffraction patterns of individual nanodroplets injected using an aerodynamic lens, to investigate possible morphology changes related to freezing. Here, the first results from this measurement are shown.
[1] Buttersack, T et al., JPCB 120 (2016): 504
[2] Amaya, A. and Wyslouzil, B., J. Chem. Phys. 148.8 (2018)
Keywords: Aerosol; Ice nucleation; High-harmonic generation; Single-droplet imaging