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Ewald Janssens教授研究情況簡(jiǎn)介：
Ewald Janssens was trained as an experimental physicist during his PhD and investigated the stability of transition metal doped gold and silver clusters. The interplay between geometry and shells of electrons was investigated and the conceptual shell model for metal clusters was extended towards two-dimensional clusters. During his postdoctoral stay in Berlin, he became interested in assigning the atomic configuration of clusters by a combination of infrared multiple photon dissociation spectroscopy and density functional theory calculations, which resulted in the identification of several unique cluster geometries. After a scientific break (job in industry) and since his appointment as associate professor in 2012, he is dealing with diverse properties of pure and doped clusters, such as their magnetism, chemical reactivity, and optical absorption properties, all studied with unique molecular beam techniques. The clusters are also used as model systems to describe problems of technological relevance, such as CO poisoning of platinum catalysts in fuel cells and hydrogen storage in nanostructured materials. The general outcome of his research is enhanced fundamental insight in the evolution of physical and chemical properties of few-atom clusters with size and composition.
Since five years, Ewald Janssens got interested in the interaction of soft-landed clusters on well characterized surfaces, in particular graphene and few-monolayer thin insulating films on metal supports. This research concentrates on cluster-surface interaction, which for example can be used to controllably modify the transport properties of graphene. It was also demonstrated that few-atom clusters can penetrate through thin insulating layers. This collaborative research work led to publications in high-impact journals.

•        Published 100 papers in peer-reviewed journals, (co-)author of 3 book chapters, and guest editor of 2 topical issues; h-index: 25, average citations per paper: 23 (WoS, January 2018). List of publications:         https://lirias.kuleuven.be/cv?u=U0034400
•        Author of 7 papers in Physical Review Letters (avg. number of citations 74, WoS); author of several other papers in highly ranked journals, including Journal of the American Chemical Society (5), New Journal of Physics (4), Nanoscale (3), Angewandte Chemie (2), ACS Nano (2), Nano Research (2), Nano Letters,…
•        20 invited and 18 contributed talks at international conferences, workshops, and universities，

Joris Van de Vondel教授研究情況簡(jiǎn)介：
Research program
• Superconductivity: Nanostructured superconductors, Superconductor/ferromagnet hybrids, vortex
dynamics, vortex ratchets, vortex visualization, high frequency response
• Spintronic: Spin transport in metals, spin injection and detection using non-local spin valves
• Scanning Probe microscopy: Different types of scanning probe microscopy functionalities (AFM, STM,
MFM and SHPM) to investigate (nanostructured) materials under extreme conditions.
• Electron transport in doped graphene devices

Research output
• 73 articles in peer-reviewed journals and 2 book chapter, including 1 paper in Nature, 2 in Advanced
Materials, 3 in Nature Communications, 1 in ACS Nano, 1 Nano Letters, 5 papers in Phys. Rev. Lett.
• Publications have been cited 1345 times (1202 times excluding self-citations) in 926 citing articles (872
excluding self-citations). The publication list has an h-index of 20.
• 22 invited talks and 3 contributed talks at international conferences and workshops

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項(xiàng)目簡(jiǎn)介：
Project： GRAPHENE AS A SENSOR FOR THE ELECTRONIC PROPERTIES OF FEW ATOM CLUSTERS

When merging atoms into a cluster, the unity is not simply the sum of its parts. Indeed, by bridging the gap between a single atom and a bulk material one observes a strong size dependence: At this length scale every atom counts! The emerging properties of these clusters combined with their preserved atomic-like character sparked researchers to call them superatoms.  

Despite the ultimate small size, these superatoms can be fabricated using conventional sputtering techniques and size selected, with atomic precision, using mass filters. At this point one can ask the question:  Why are these superatoms never used as basic building blocks to create novel functionalities, i.e., implemented in a real device architecture?  The answer to this question is straightforward: contacting a zero dimensional object seems impossible without destroying its intrinsic properties.   

In this project, we make it happen by introducing a unique approach, using the two-dimensional material graphene as a 'smart' landing platform for the fabricated clusters. Clusters land without strong modifications, converting these superatoms into superdopants. At the same time, the graphene can be used as a local sensor for the cluster properties. This fascinating synergy allows us to perform material engineering with ultimate precision and explore size specific charge transfer and the catalytic properties of few-atom clusters through electronic readout of a graphene-cluster hybrid structure.

This project is mainly an experimental work using state-of-the-art nanofabrication and characterization tools: clean room facilities (electron beam lithography), cluster deposition and electrical characterization under extreme conditions (i.e. low temperatures and high magnetic fields).