603 zoekresultaten voor “us electron” in de Publieke website
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PROGENY
How do you make a technology sustainable that does not even exist yet? Well, by bringing together an interdisciplinary team of pioneering European experts right at the start and paying attention to sustainability right from the development phase.
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'Q-wires': Synthesis, electrochemical properties and their application in electro-enzymology
An objective of this research was to achieve direct, well-defined and non-rate-limiting electron transfer between respiratory enzymes and the electrode surface by means of 'Q-wires'.
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Spin-triplet supercurrents of odd and even parity in nanostructured devices
Triplet superconductivity refers to a condensate of equal-spin Cooper pairs (pairs of electrons with equal spin).
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Delaware: How empirical legal research on valuation biases was used in a US courtroom
Many of our department’s staff members are actively involved in the Empirical Legal Studies lab and strive towards publishing impactful empirical legal research.
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Accelerating the Photocatalytic Water Splitting in Catalyst−Dye Complexes
As a virtually inexhaustible source, solar energy plays a major role in future global energy scenarios.
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StepTalk ‘Policing in the US: What’s Feminism Got to Do with It?’ by Josephine Ross
Police killed Eric Garner 9 years ago (‘I can’t breathe’) when he resisted a search. Now everyone will consent to stops and searches. Law Professor and author Josephine Ross looks to feminism: what police call consent, feminists would call submission. During the lecture on Wednesday 31 May, Josephine…
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Development and application of cryo-EM tools to study the ultrastructure of microbes in changing environments
Cryogenic electron microscopy (cryo-EM) is a powerful technique used to visualize the inside of cells and to study specific protein complexes. Within this thesis, I describe the use of various cryo-EM techniques to gain insight into the structural changes of the human pathogen, Vibrio cholerae, as it…
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Gold nanoparticle-peptide conjugates for biomedical applications
Despite the fact that gold nanoparticles (GNPs) are one of the most studied nanoparticles, there is still a necessity for new approaches allowing for effective protective coating to enable wider use of GNPs in biomedical applications.
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Towards artificial photosynthesis: resolving supramolecular packing of artificial antennae chromophores through a hybrid approach
Promotor: H.J.M. de Groot
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Making the invisible visible: paramagnetic NMR and the transient protein complex
Promotor: Prof.dr. M. Ubbink
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Geometric phases in soft materials
Geometric phases lead to a nontrivial interference result when an electron's different quantum mechanical paths choices encircle a magnetic coil in an Aharonov-Bohm experiment.
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Understanding protein complex formation: The role of charge distribution in the encounter complex
Protein–protein complexes are formed via transient states called encounter complexes that greatly influence the formation of the stereospecific complex.
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Size effects in microstructured superconductors and quantum materials
We find ourselves in an era of transition, not just towards a more computing- and data-driven society but also away from unsustainable fossil fuels as an energy source.
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Ariane Briegel in NRC Handelsblad over supermicroscoop
Een speciaal type microscoop jaagt momenteel een revolutie aan in de biologie: de cryo-elektronenmicroscoop. Twee van zulke giganten staan sinds 2011 op de Leidse Faculteit der Wiskunde en Natuurwetenschappen. Hoogleraar Ultrastructuurbiologie Ariane Briegel vertelt hierover in het NRC Handelsblad.
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Nano-scale Electronic Structure of Strongly Correlated Electron Systems
Promotie
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Insights from scanning tunneling microscopy experiments into correlated electron systems
Promotie
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Helder beeld van bacteriën
Een bacterie supersnel bevriezen, om de structuur van buiten en binnen natuurgetrouw in beeld te brengen. Hoogleraar Ultrastructuurbiologie Ariane Briegel kwam speciaal hiervoor naar Leiden: de Universiteit Leiden is een van de weinige instituten wereldwijd waar de benodigde apparatuur beschikbaar is.…
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Photosynthetic light reactions at the gold interface
Promotor: T.J. Aartsma, Co-promotor: R.N. Frese
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The electrochemical reduction of dioxygen and hydrogen peroxide by molecular copper catalysts
The electrochemical oxygen reduction reaction (ORR) is an essential half-reaction for the utilization of hydrogen as a sustainable fuel, via the conversion of hydrogen to electrons and protons facilitated by the ORR. In the most common fuel cells, the ORR is requires high loadings of non-abundant platinum…
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Towards photo-CIDNP MAS NMR as a generally applicable enhancement method
Promotores: Prof.dr. H.J.M. de Groot, Prof.dr. J. Matysik (Universitaet Leipzig)
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Specifiek eiwit in de hoofdrol bij ziekte van Parkinson
Met elektronspins hebben natuurkundigen het bindingsproces onderzocht van het eiwit α-synucleïne, dat wordt geassocieerd met de ziekte van Parkinson. Wat blijkt is dat het eiwit op een verrassend efficiënte manier bindt aan een hersenmembraan. Met deze in Leiden ontwikkelde methode hebben de onderzoekers…
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Nanodeeltjes – redox eiwit biohybriden
Kunstmatige fotosynthese heeft als doel om via chemische processen zonne-energie om te zettn in brandstof. Semi-kunstmatige fotosynthese is een hybride aanpak waarbij chemische maar ook biotechnologische processen worden gebruikt. Wij hebben als doel om een hybride systeem te ontwikkelen met behulp…
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Probing Molecular Layers with Low-Energy Electrons
Promotie
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PhD position: ultrafast broadband-THz spectroscopy of perovskite materials
Wiskunde en Natuurwetenschappen, Leids Instituut voor Chemisch Onderzoek (LIC)
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Quantum dots in microcavities: From single spins to engineered quantum states of light
A single self-assembled semiconductor quantum dot in a high-finesse optical microcavity - the subject of this thesis - is an interesting quantum-mechanical system for future quantum applications. For instance, this system allows trapping of an extra electron and thus can serve as a spin quantum memory,…
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Accessible remote sensing of water
Water is all around us and is vital for all aspects of life. Studying the various compounds and life forms that inhabit natural waters lets us better understand the world around us.
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On topological properties of massless fermions in a magnetic field
Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.
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Dancing with the Stars
This thesis develops a method for direction dependent calibration of the ionosphere in radio interferometric data.
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Applications of topology to Weyl semimetals and quantum computing
This thesis covers various applications of topology in condensed matter physics and quantum information.
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Putting a spin on it: amyloid aggregation from oligomers to fibrils
This thesis focuses on amyloid proteins, a class of proteins that convert into amyloid fibrils.
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Elektronen gevonden die stromen als water
Het blad Science publiceert drie artikelen tegelijk over een belangrijke ontdekking in vastestoffysica. Leids natuurkundige Jan Zaanen bespreekt deze ontdekking in dezelfde uitgave van 4 maart.
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Kleinste Universiteit Leiden-logo gemaakt
Het logo van de Universiteit Leiden, met letters zo klein als een bacterie. Wetenschappers van het LUMC en het Instituut Biologie hebben het kleinste logo ooit van onze universiteit gemaakt. Een grapje met een serieuze ondertoon: met de nieuwe microscoop waarmee het logo is gemaakt, kunnen zij nog gedetailleerder…
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What a glow in the dark squid tells us about the human gut microbiome
Lezing, Tuesday Talks: Science Insights
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Weighing the Dark: Cosmological Applications of Gravitational Lensing
Promotor: K. Kuijken, Co-Promotor: H. Hoekstra
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Dreaming of You: A Writing Course on Crushes
Kunst en vrije tijd, Kunst en vrije tijd
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Geert-Jan Kroes
Wiskunde en Natuurwetenschappen
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Josephson and noise scanning tunneling microscopy on conventional, unconventional and disordered superconductors
In this thesis we use Josephson and noise scanning tunneling microscopy for the study of conventional, unconventional (iron-based) and disordered superconductors. On the one hand, Josephson scanning tunneling microscopy allows us to directly visualize the superfluid density with high spatial resolut…
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Nieuwe techniek om geleiding te meten in gestapelde nanomaterialen
Leidse natuurkundigen hebben een nieuwe techniek ontwikkeld om elektrische geleiding te visualiseren in materiaal van gestapelde individuele atoomlagen. Jaap Kautz en Johannes Jobst, die dit jaar de NeVacprijs ontvingen voor hun onderzoek, publiceerden in Nature’s Scientic Reports.
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Sara Polak in Het Financieele Dagblad over white supremacism tijdens de Amerikaanse midterms
'White supermacism' is een aanjager van verhalen over verkiezingsfraude, betoogt universitair docent Sara Polak in Het Financieele Dagblad.
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Low energy electron transmission through layered materials and chiral organic films
Promotie
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Monitoring and detection of nanomaterials in biological media.
How do nanoparticles bioaccumulate and biodistribute in organisms?
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Using cryo-EM methods to uncover structure and function of bacteriophages
Bacteriophages, or phages for short, are the most abundant biological entity in nature. They shape bacterial communities and are a major driving force in bacterial evolution.
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Inducing spin triplet superconductivity in a ferromagnet
Promotor: J. Aarts
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On transport properties of Majorana fermions in superconductors: free & interacting
Majorana fermions in superconductors are the subgap quasiparticle excitations that are their own antiparticles.
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Nuclear magnetic resonance force microscopy at millikelvin temperatures
Promotor: T.H. Oosterkamp
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Reactivity of cobalt(II)-dichalcogenide complexes: correlation between redox conversion and ligand-field strength
The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.
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Photocatalytic redox reactions at the surface of liposomes
Promotor: Prof.dr. E. Bouwman, Co-promotor: S. Bonnet
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On electronic signatures of topological superconductivity
Promotor: Prof.dr. C.W.J. Beenakker
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The optimization and scale-up of the electrochemical reduction of CO₂ to formate
Carbon dioxide capture and utilization technologies are necessary to create a truly circular economy. The electrochemical reduction of carbon dioxide to formate is an appealing carbon utilization method as it can be performed at room temperature and pressure, it only requires two electrons, and it has…
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Magnetic imaging of spin waves and magnetic phase transitions with nitrogen-vacancy centers in diamond
The elementary excitations of magnets are called spin waves, and their corresponding quasi-particles are known as magnons. The rapidly growing field of Magnonics aims at using them as information carriers in a new generation of electronic devices, (almost) free of electric currents.