The oldest university in the Netherlands has produced many well-known scientists. Some of them are known to the wider public; others are perhaps less well known, but their achievements are no less impressive.

Where and how are critical materials currently used and how can this information be used to develop scenarios about their future demand.

Stack two layers of graphene, twisted at slightly different angles to each other, and the material spontaneously becomes a superconductor. Science still can't explain how something so magical can happen, but physicists use special equipment to reveal what is taking place under the surface.

A common assumption in chemistry is that the coordination number of a catalyst's surface determines the reactivity of the reaction it catalyses. Strikingly, Leiden chemists have now proven that this is not true for nature’s most simple chemical reaction: the dissociation of hydrogen. The researchers…

After almost four decades, Leiden and Eindhoven chemists have resolved the discussion about the correct model for the simplest chemical reaction in heterogeneous catalysis, which is essential for fuel cells. Using a unique curved platinum surface, Ludo Juurlink and PhD candidate Richard van Lent from…

Ady Roxburgh has been awarded a two-year grant to continue his research into the choices behind the composition of Roman, copper-alloy artefacts. The Estonian Research Council has awarded him a fully funded Mobilitas Pluss postdoctoral grant. The Evaluation Committee decided to fund the first 5 applications…

On Friday October 25th the fourth annual Jan Reedijk Symposium will be held. The main lectures of the day will be

The Spanish Society of Soil Science has chosen as the best thesis of 2015 (call 2016) in Spain to the CML-researcher Daniel Arenas Lago, for his research at the University of Vigo that expands and deepens in new knowledge about adsorption and retention of heavy metals in soils, an issue increasingly…

Archaeology can help us reflect critically on our European identity. This is what David Fontijn will claim in his inaugural lecture on 18 March.

Leiden scientists have discovered a new plant genus with two new species at a potential nickel mine site in Indonesia. Remarkable characteristic of the plants: they store manganese in their leaves.

Plants are able to resist a pathogen’s attack by a dual innate immune system. The relationship between the two pathways was not clear, but it turns out that they mutually potentiate each other, as assistant professor Pingtao Ding (Institute of Biology Leiden) and colleagues (The Sainsbury Laboratory,…

The surface of platinum electrodes changes much more during use than was previously thought. In a collaboration between the Leiden Institutes of Chemistry and Physics, chemists Leon Jacobse, Yi-Fan Huang and Marc Koper, and physicist Marcel Rost have been able to show this for the first time. Publication…

Studying surfaces of solid materials: it may not seem relevant to energy consumption, but it is. Marcel Rost studies how platinum electrodes wear out. Those electrodes are a crucial component in the fuel cells of hydrogen-powered cars. ‘We need to make the switch from fossil fuel energy to hydrogen.…

How can we organise society so as to keep our planet habitable for us and for all other life forms around us? To answer this question, Leiden researchers collaborate across disciplines, from biology to data science, and from environmental economy to archaeology.

Recent publications

How do you study complex disasters like a nuclear explosion or a natural disaster? Who can help unravel the legal knot that Brexit has become? The important societal themes of the present day call for interdisciplinary collaboration. Leiden scientists pitched their research at a symposium at Leiden…

A discovery made in Leiden helps not only to make natural gas from CO2 but also to store renewable energy. Research by Professor Marc Koper and PhD student Jing Shen shows how this process can be implemented in a cost-effective and controllable way. Nature Communications, 2 september 2015.

Graphene, the ultra-thin wonder material just a single carbon atom in thickness, holds the promise of such impressive applications as wear-resistant, friction-free coatings. But first manufacturers have to be able to produce large sheets of graphene under precisely controlled conditions. Dirk van Baarle…

Chemist Prof. Marc Koper was awarded the Carl Wagner Memorial Award of the Electrochemical Society.

Microscopic swimmers such as bacteria do not always swim alone. There are advantages to exchanging information and cooperating. Stefania Ketzetzi and colleagues now show in Nature Communications that human-made microswimmers, too, can cooperate.

Sander Blok has won the third edition of the annual LION Image Award. He created a colorful image of gold nanoparticles with a low-energy electron microscope.

A new regional atlas, with information about the presence of pesticides in surface waters, has been developed by the Institute of Environmental Sciences (CML) in collaboration with Royal Haskoning DHV. The aim of the regional pesticide atlas is to support decision making at local and regional levels,…

The behaviour of strongly correlated electron systems, such as high-temperature superconductors, defies explanation in the language of ordinary quantum theory. A seemingly unrelated area of physics, string theory, might give physicists a better understanding of the weird behaviour of these kinds of…

The Ra’s al-jinz project tackles economic diversification and social complexity in non-urban societies, from the perspective of Eastern Arabia, by exploring the Early Bronze Age settlement of Ra’s al-jinz RJ-3.

Current research at the Skin Barrier and Vaccination group.

A vibrant chronological narrative of ceramic manufacturing practices in the valley of Juigalpa, Chontales, Nicaragua (cal 300 CE - present)

A new mathematical model may explain how body cells get their shapes and what makes them move within a tissue. The model provides fundamental knowledge for applications in tissue engineering, amongst other things. Publication in open-access journal iScience.

High-temperature superconductivity is one of the big mysteries in physics. Milan Allan’s research group used a Josephson Scanning Tunneling Microscope to image spatial variations of superconducting particles for the first time, and published about it in the journal Nature.

Leiden Physicists have developed a new technique to visualize electrical conductance in sheet-like nano materials. It shows great promise for devices based on a new family of materials—the ‘Van der Waals materials’. The physicists, who won the 2015 Dutch Vacuum Society prize for their work, present…

Electrochemist Marc Koper has been awarded an ERC Advanced Grant of 2.5 million euros for research into chemical reactions driven by electrodes and electricity. He hopes that new insights will make it into the textbooks and help design green processes, such as making fuel from greenhouse gas.

Leiden research into the properties of platinum receives a TOP subsidy of 780.000 euros from the The Netherlands Organisation for Scientific Research NWO. Aim of the project is a more efficient and sustainable use of the rare metal.

Rather than one key and one strong lock, biology often uses tens or hundreds of weaker links to bind parts together, such as cells membranes. This allows for selectivity and also reversibility: the binding can also be undone. Researchers first caught this phenomenon using spheres or colloids, and published…

What happens to the different waste streams?

This project explored the role of material culture, in casu painted plaster and its technologies, in expressing dynamic social identities and in forging complex interwoven human relationships in the context of the Middle to Late Bronze Age of the Aegean and East Mediterranean.

Ceramics and Society in the Aegean from the 7th to the 20th century A.C. A Case Study from Boeotia, Central Greece (2003)

Kros

This project incorporates spatiality into the discussion of medieval demography, allowing for a more nuanced view on medieval town populations. It establishes a maximum population count for towns for periods prior to 1400 and provides a means to compare the ranking of towns using size and density instead…

Of the 105 Spinoza Prizes that have been awarded since 1995, 26 have gone to researchers from Leiden University. The NWO Spinoza Prize is the highest Dutch award in science. The younger NWO Stevin grant goes to researchers who have achieved great success in the field of knowledge utilisation for society.…

They were called 'annoying brats', the group of campaigning scientists who in 1978 founded what is now an internationally acclaimed ecological research institute. Their stories and those of the current staff of the Institute of Environmental Sciences are described in the book 'Forty years of Leiden…

The Old Obervatory Leiden is one of the partners of the local learning ecosystem ‘Verwonder om de Hoek’, an educational platform from Leiden that lets school children and families wonder about the world of Nature, Science, Technology and Sustainability. On this page you will find the educational programmes…

What workflow of non-destructive techniques provides accurate, valuable data to improve our understanding of Caribbean archaeological landscapes? How were Amerindian settlements configured?

How can cell wall engineering approaches be used to improve streptomycetes for industry to make new antibiotics?

Eyserheide. A Magdalenian Open-Air Site In The Loess Area Of The Netherlands And Its Archaeological Context.

This project embarks on empirical analysis of popular psycho-physical practices in contemporary Korea.

Knowledge and culture subproject 3:

What are the capabilities or limitations of traveling between islands and how does this reflect seasonal variation? Is it possible to show higher levels of connectivity between islands based on generated pathways between several sites on two separate islands?

Do selenium nanoparticles in fish food cause subtle alterations in behavior of fish: effect of particles size and concentration?

When do fire making tools appear in prehistory, and how might the use of these tools manifest in the archaeological record?

Bead microrheology: Analysis of active and passive transport in living cells

We explore the possibilities to combine magnetic resonance techniques with atomic force microscopy together in a single microscope: the MRI-AFM, also called Magnetic Resonance Force Microscopy (MRFM).