Renske van der Veen heads new department "Atomic Dynamics in Light-Energy Conversion"
Renske van der Veen has a lot of experience with ultrafast x-ray measurements. © Irene Böttcher-Gajweski/MPIBC
From June 2021, Dr. Renske van der Veen is setting up a new research group at HZB. The chemist is an expert in time-resolved X-ray spectroscopy and electron microscopy and studies catalytic processes that enable the conversion of solar energy into chemical energy.
Dr. Renske van der Veen successfully obtained a Helmholtz Funding of first-time professorial appointments of excellent women scientists (W2/W3), whereupon the HZB has already initiated an S-W2 appointment procedure at TU Berlin. She has 14 years of experience in the field of ultrafast X-ray methods. "At BESSY II, I can apply and expand this experience in my research project," says van der Veen, emphasising, "The results could also contribute to the scientific case for BESSY III."
Renske van der Veen studied at ETH Zurich, received her PhD from the École Polytechnique Fédérale de Lausanne (EPFL) and conducted research at the California Institute of Technology, the Max Planck Institute for Biophysical Chemistry in Göttingen, and the University of Illinois, where she held an assistant professorship. Her research was honoured with the Sofja Kovalevskaja Award of the Alexander von Humboldt Foundation and the Packard Fellowship for Science and Engineering.
At HZB, Renske van der Veen is now looking forward to exchange with research groups working on related topics, from modelling ultrafast energy transfer, developing ultrafast techniques at BESSY II, to developing photoelectrodes and heterogeneous photocatalysts at the Institute for Solar Fuels.
- Patterns of polar vortices in lead-free superlattices on siliconA team at HZB has, for the first time, reported polar vortices in (BaTiO3/SrTiO3)10 superlattices on silicon. These results expand the range of materials and substrates on which polar topological textures can occur and open up new options for incorporating complex ferroelectric states into silicon-based technologies.
- Nanosilver as an electrocatalyst for CO₂ reductionVia electrolysis, CO2 can be reduced to CO, a raw material for further chemical products such as fuels. Within the GreenQuest Project, an internation team led by HZB chemist Prashanth Menezes has now systematically investigated catalyst layers made of silver nanoparticles, varying both the size of the particles and their density. The best yield was achieved with nanoparticles with diameters of around 10 nm, which were loosely distributed. Furthermore, they demonstrated how the economic efficiency of the electrochemical cell can be enhanced by integrating an additional chemical reaction at the anode, enabling the simultaneous production of a valuable formic acid, hydrogen, and CO in one device.
- Spin waves inside a nano-oscillator imaged for the first timeFor the first time, researchers have directly imaged the magnetisation dynamics inside a spin Hall nano-oscillator — a nanoscale device that converts direct current into tunable microwave signals and is a promising building block for energy-efficient wireless communication and brain-inspired computing. A Swedish–German team led by the University of Gothenburg and Helmholtz-Zentrum Berlin (HZB) achieved this using time-resolved scanning transmission X-ray microscopy at the MAXYMUS instrument at BESSY II. The results, now published in Advanced Materials, reveal spin-wave features that had escaped previous, indirect measurement techniques.