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Photoelectron angular distributions as sensitive probes of surfactant layer structure at the liquid-vapor interface

Title data

Dupuy, Rémi ; Filser, Jakob ; Richter, Clemens ; Seidel, Robert ; Trinter, Florian ; Buttersack, Tillmann ; Nicolas, Christophe ; Bozek, John ; Hergenhahn, Uwe ; Oberhofer, Harald ; Winter, Bernd ; Reuter, Karsten ; Bluhm, Hendrik:
Photoelectron angular distributions as sensitive probes of surfactant layer structure at the liquid-vapor interface.
In: Physical Chemistry Chemical Physics. Vol. 24 (2022) Issue 8 . - pp. 4796-4808.
ISSN 1463-9084
DOI: https://doi.org/10.1039/D1CP05621B

Abstract in another language

The characterization of liquid–vapor interfaces at the molecular level is an important underpinning for a basic understanding of fundamental heterogeneous processes in many areas, such as atmospheric science. Here we use X-ray photoelectron spectroscopy to study the adsorption of a model surfactant, octanoic acid, at the water–gas interface. In particular, we examine the information contained in photoelectron angular distributions and show that information about the relative depth of molecules and functional groups within molecules can be obtained from these measurements. Focusing on the relative location of carboxylate (COO−) and carboxylic acid (COOH) groups at different solution pH, the former is found to be immersed deeper into the liquid–vapor interface, which is confirmed by classical molecular dynamics simulations. These results help establish photoelectron angular distributions as a sensitive tool for the characterization of molecules at the liquid–vapor interface.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics VII - Computational Materials Design (BayBatt)
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics VII - Computational Materials Design (BayBatt) > Chair Theoretical Physics VII - Computational Materials Design (BayBatt) - Univ.-Prof. Dr. Harald Oberhofer
Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 23 Mar 2022 12:29
Last Modified: 23 Mar 2022 12:29
URI: https://eref.uni-bayreuth.de/id/eprint/68983