Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 85: Vacuum Science & Technology: Theory and Applications II

O 85.2: Talk

Thursday, March 12, 2026, 15:30–15:45, HSZ/0401

Near Ambient Pressure ARPES for Operando Surface Studies at Synchrotron SOLEIL — •L. Dudy¹, E. Auffray^1,2, J.-J. Gallet^1,3, F. Bournel^1,3, M. Bouaziz³, B. S. Mun⁴, S. Jang⁴, Y. Tsujikawa⁵, H. Kondoh⁵, S. Moser⁶, V. Jovic¹⁰, V. Mischke⁷, P. Keßler⁸, and S. Maehl⁹ — ¹Synchrotron SOLEIL, France — ²U Paris-Saclay, France — ³Sorbonne U, France — ⁴GIST, South Korea — ⁵Keio U, Japan — ⁶U Bochum, Germany — ⁷TU Dortmund, Germany — ⁸U Würzburg, Germany — ⁹SPECS, Germany — ¹⁰GNS Science, New Zealand

We present a near-ambient pressure angle-resolved photoemission spectroscopy (NAP-ARPES) setup for operando studies of electronic structure under gas exposure at Synchrotron SOLEIL. This development bridges the gap between conventional UHV ARPES and realistic surface environments, enabling momentum-resolved measurements during catalytic and energy-related processes at pressures up to several millibars. The approach is demonstrated using model systems, showing that band structure evolution can be tracked in real-time during adsorption and reaction. These results highlight the potential of NAP-ARPES for investigating dynamic surface phenomena. By extending ARPES into near-ambient conditions, this method opens new opportunities for studying functional materials under realistic environments for operando electronic structure analysis in surface science.

Keywords: NAP-ARPES; Near Ambient Pressure; Operando, Surface Science; Synchrotron Radiation