Lund University

MAX IV laboratory




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Research fields

X-ray photoemission spectrum

Catalysis and surface oxidation

This project involves studies of atomic processes in model systems in order to obtain a fundamental understanding of the material, its electronic structure and important surface processes. Studies of catalytic processes on model surfaces involve systems such as metals, oxides, metallic clusters and nanostructures on surfaces. We are involved in several networks on catalysis research which are funded by VR, SSF and NordForsk.

Project leader: Dr Johan Gustafson
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Low-dimensional semiconductors

STM image

A primary aim of this research is to understande the roll of the surface and interface layers in material for the function and properties of the material. An understanding of how nanoscale materials grow and how to influence their structure is a driving force. Materials such as semiconductors for light-emittieng diodes, solar cells, low-energy electronics and bioelectronic contacts are of interest. Our work takes place in collaboration with the Lund Laser Centre and with the Nanometer Consortium in Lund.

The future NanoMAX beam line will be a key infrastructure for this research.

Project leader: Professor Anders Mikkelsen.
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High-pressure x-ray photoelectron spectroscopy

HIgh-pressure cell for XPS

Electron spectroscopy has provided much of our current knowledge on the chemical and physical processes involved in the complex interactions between a solid surface and its surroundings. Such processes are important for surface catalysis and corrosion, for example.

As the surface state depends strongly on its environment, it is vital that such studies are performed under realistic in situ and/or operando conditions. Recently, HP-XPS has been introduced as a powerful method to approach such questions due to the sensitivity to the chemical state of the substrate as well as of the adsorbates. Whereas it is not possible to perform electron spectroscopy at realistic pressures for industrial catalytic reactions, the maximum pressure of 25 mbar is in most cases sufficient for modeling real reaction conditions.

The SPECIES instrument at MAX-Lab is a key infrastructure for this project. The HIPPIE beam line is being designed for the future MAX IV ring.

Project leader: Professor Joachim Schnadt.
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Atomic, molecular and cluster spectroscopy

water rearrangement process

We are interested in understanding the photoionization of atoms, molecules, and clusters. The group is involved in experiments using synchrotron radiation where core electron excitation is an important start for dynamic processes resulting in fragmentation. We have a long history in electron spectroscopy of atoms, molecules and clusters and now imaging experiments where electrons or ions are detected have been developed within the group.

Most of the soft x-ray experiments are carried out at the I411 beam line at MAX-Lab. The normal-incidence beam line I3 at MAX III provides UV light for studies of the valence and inner-valence regions. Time-resolved studies are carried out in collaboration with scientists at the Lund Laser Center and the attosecond physics group using the attosecond pulsed laser source at LLC.

Project leader: Professor Stacey Sörensen
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