Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 78: Vacuum Science & Technology: Theory and Applications I

O 78.2: Vortrag

Donnerstag, 12. März 2026, 11:00–11:15, HSZ/0401

Pulsed Molecular Beam Reactive Scattering for Investigation of Surface Chemical Reactions — •Oleksandr Arsatiants, Tobias Hinke, Kevin Bertrang, and Ueli Heiz — Chair of Physical Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany

Molecular beam reactive scattering (MBRS) is a powerful technique for investigating surface reactions on defined surfaces in UHV, providing complementary results to single-cycle experiments like thermal desorption spectroscopy (TDS) [1]. Pulsed MBRS is especially promising, as it can be used to investigate surface reaction kinetics under quasi steady-state conditions [2-5]. For molecules with complex MS fragmentation patterns, however, the short time scales present a challenge due to mass switching delays. Ongoing work on automation of p-MBRS measurements for rapid mass switching will be presented.

[1] F. Zaera, Surf. Sci. Rep. 72 (2), 59-104 (2017).

[2] P. N. Brier, J. N. Fletcher and P. A. Gorry, Surf. Sci. 365 (2), 525-534 (1996).

[3] P. Bond, P. N. Brier, J. Fletcher, P. A. Gorry and M. E. Pemble, Chem. Phys. Lett. 208 (3-4), 269-275 (1993).

[4] P. Bond, P. N. Brier, J. Fletcher, W. J. Jia, H. Price and P. A. Gorry, Surf. Sci. 418 (1), 181-209 (1998).

[5] M. D. Rötzer, M. Krause, T. Hinke, K. Bertrang, F. F. Schweinberger, A. S. Crampton and U. Heiz, Phys. Chem. Chem. Phys. 26 (18), 13740-13750 (2024).

Keywords: Molecular beam reactive scattering; Ultra-high vacuum; Instrumentation; Selectivity; Mass spectrometry