Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 52: New Methods: Experiment

O 52.4: Poster

Tuesday, March 18, 2025, 18:00–20:00, P2

Simultaneous Grazing Incidence Small Angle X-Ray Scattering (GISAXS) and Absorption Spectroscopy (XAS) of Liquid Surfaces — •Carlo Schneider, Lukas Voss, Frederic Braun, and Dirk Lützenkirchen-Hecht — Bergische Universität Wuppertal

A method combining Grazing Incidence Small Angle X-ray Scattering (GISAXS) and X-ray Absorption Spectroscopy (XAS) has been developed to investigate liquid surfaces. The approach employs a specialized reaction cell and detection systems, including a PILATUS 100k detector for scattering data and a PIPS detector for absorption spectra, paired with a Quick EXAFS (QEXAFS) monochromator. Solutions of nickel chloride, cobalt nitrate, and zinc acetate were analyzed to evaluate the feasibility of integrating time-resolved GISAXS with XAS. Results demonstrate the capability of the method to provide structural and compositional information on nanometer and angstrom scales simultaneously. Challenges, such as interference patterns potentially caused by instrumental effects, were identified and suggest areas for further refinement. The developed technique offers potential for applications in materials science and chemistry, enabling insights into liquid systems.

Keywords: XAS; X-Ray Scattering; liquid; surface