Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 27: Electron-Driven Processes
O 27.4: Vortrag
Dienstag, 6. September 2022, 11:15–11:30, H6
Electron-driven mobility of the hydrogen-bonded ammonia clusters — •prashant srivastava1, Daniel Miller2, and Karina Morgenstern3 — 1Chair of physical chemsitry-I, Ruhr University Bochum, Germany — 2Department of Chemistry, Hofstra University, 106 Berliner Hall, Hempstead, New York 11549, United States — 3Chair of physical chemsitry-I, Ruhr University Bochum, Germany
Electron-driven processes in polar solvents are of great interest to study, e.g., electron solvation in ammonia plays a vital role in ozone layer depletion. We study the impact of electrons on the ammonia clusters adsorbed on a copper surface using a combination of low-temperature scanning tunneling microscopy, femtosecond laser pulses, and ab-initio calculations. Photo-injected electrons from the copper surface lead to diffusion or desorption of the second layer of the clusters. Upward mass transport (UMT) and downward mass transport (DMT) also play an important role in modifying the hydrogen-bonded network of these clusters. Theoretical calculations confirm electron solvation into the second layer. We present a molecular-scale insight into the interactions of photo-injected electrons with the ammonia clusters in the second layer. Our results show that this interaction can modify an ammonia cluster and enhance its mobility.