X-ray & neutron spectroscopy, scattering, and imaging in atmospheric chemistry

Session

Solids and solid interfaces

13 Nov 2024, 16:30

OSGA/EG6 (Paul Scherrer Institut)

Conveners

Solids and solid interfaces

• Markus Ammann (PSI - Paul Scherrer Institut)

Solids and solid interfaces

• Luca Artiglia (Paul Scherrer Institut)

22. Interfacial Acid Base Chemistry

Thorsten Bartels-Rausch (PSI - Paul Scherrer Institut)

13/11/2024, 16:30

Cloud formation, atmospheric chemistry, and human health are influenced by multiphase chemistry at the air-substrate interface of atmospheric particles and ground surfaces (Pöschl and Shiraiwa 2015). All of these impacts are affected by acidity (Angle et al. 2021). A conceptional understanding of interfacial acid-base character has not yet been reached (Saykally 2013). Using X-ray...

25. Pores, Patches, and Burried Surfaces: Samples for future XPS and XAS studies

Thorsten Bartels-Rausch (PSI - Paul Scherrer Institut)

13/11/2024, 16:40

I'll present some atmospheric chemistry science cases and options to answer key questions with X-ray excited electron spectroscopy. This talk focuses very much on sample development that mimic atmospheric surfaces and allow systematic studies.

14. Current status and future developments of in situ XPS studies of solid-gas/vapor interfaces

Luca Artiglia (Paul Scherrer Institut)

13/11/2024, 16:50

Interfaces have a fundamental role in chemistry because they are the place where most reactions take place. Over the last 20 years, in situ X-ray photoelectron spectroscopy (XPS) has known a huge technological development and now offers the possibility to routinely characterize solid-gas, solid-vapor and solid-liquid interfaces. In situ XPS has joined the surface sensitivity of the technique...

20. Chemically active aerosol surface

Xiangrui Kong (University of Gothenburg)

13/11/2024, 17:10

17. Application of synchrotron X-ray radiation methods to study alkali feldspar / water interface

Alexei Kiselev (Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research)

14/11/2024, 09:00

"Alkali feldspar is an important constituent of airborne mineral dust, the major source of primary ice nucleating particles (INPs) in the atmosphere. Some alkali feldspars have particularly high ice nucleation (IN) activity. This phenomenon has been recently ascribed to the ability of (100) planes of alkali feldspar to nucleate ice. However, the structure of feldspar-ice interface is not known...

18. X-ray scattering methods for ice formation on solid surfaces

Bärbel Krause (KIT)

14/11/2024, 09:20

Aerosol particles, in particular mineral dust, play an important role in the condensation of cloud droplets and formation of ice crystals. Airborne mineral dust consists mainly of clay minerals (~60%), quartz (~25%), and feldspar (~12 %). The comparatively low fraction of feldspar dominates the ice nucleation. Recently, A. Kiselev et al. revealed oriented ice growth on several feldspar...

26. Small-Angle Neutron Scattering (SANS) for Characterization of Particulate Microstructures

Urs Gasser (PSI - Paul Scherrer Institut)

14/11/2024, 09:40

Small-angle scattering (SAS), including neutron (SANS) and X-ray scattering (SAXS) techniques, enables in-depth examination of particle structure and composition at the nanometer scale, making it highly applicable for atmospheric research. This presentation will introduce the fundamentals of SANS, with a focus on its distinctive advantage of contrast variation, which allows selective...