Claudia Struzzi: MaxPEEM- a dedicated photoemission microscopy and spectroscopy beamline at MAX IV Laboratory

C. Struzzi, N.A. Vinogradov, Y. Niu, A.B. Preobrajenski, A.A. Zakharov MAX IV Laboratory - Lund University, Sweden The Spectroscopic PhotoElectron and Low Energy Electron Microscope (SPELEEM) is installed at the dedicated beamline MaxPEEM at MAX IV synchrotron, Lund (Sweden). The key feature of the SPELEEM relies in the availability of different contrast mechanisms allowing imaging structural, chemical, electronic, and magnetic properties with spatial resolutions in the nanometer range. The recent upgrade of the microscope with an aberration corrector improves the spatial resolution of the microscope by an order of magnitude (down to 2nm resolution in some modes of operation) and increases the transmission by a similar factor. The samples can be investigated in operando condition by exploiting the detection at video-rates and monitoring real-time dynamical processes at the surface at elevated temperatures. Sampling structures from the micrometer down to the nanometer scale is feasible thanks to the large range of available field of view (from 0.75 μm up to 100 μm). The capabilities of this powerful instrument allow surface studies in a wide range of disciplines, e.g. materials science, nano-science, heterogeneous catalysis, corrosion science, polymer science. To give a taste of the main characteristics of the different SPELEEM imaging modes and to emphasize the capabilities of the instrument, few research examples are presented, e.g. intercalation of germanium at the SiC-graphene interface and graphene protection to oxidation of copper foil. Dr. Claudia Struzzi is an experimental physicist with experience in surface science. After the Master’s Degree in Physics at the Sapienza University of Rome (Italy) in 2012, she worked 18 months at the ARPES beamline BaDElPh, at ELETTRA synchrotron in Trieste (Italy), where she contributed to the operation, optimization, maintenance and upgrade of the beamline, providing support to the external users and performing research activities. At the end of 2013, she was awarded by the Belgian Funds for Scientific Research (FNRS) with a fellowship to start the PhD thesis (defended in 2017). Her work focused on fluorination of carbon nanostructures (graphene and carbon nanotubes) and their implementation in gas sensing devices to test their sensing properties to ppm concentration of NO2 and NH3 gases. During the PhD, she gained experience with various spectroscopic and microscopic characterization techniques. Immediately after the PhD, she joined MAX IV synchrotron in Lund (Sweden) as PostDoc Researcher working at MaxPEEM beamline where the AC-SPELEEM microscope is installed. In 2018, she won the “Prix de Chimie appliquée 2018” that is a biennial price issued by FNRS for an original PhD thesis concerning new concepts and applications in the field of industrial chemistry.