740 zoekresultaten voor “k3 surfaces” in de Publieke website

Topological aspects of rational points on K3 surfaces
Promotor: P. Stevenhagen, Copromotor: R.M. van Luijk

Topics in the arithmetic of del Pezzo and K3 surfaces
Promotores: P. Stevenhagen, L. van Geemen (Università degli studi di Milano), CoSupervisor: Ronald M. van Luijk

Counting points on K3 surfaces and other arithmeticgeometric objects
This PhD thesis concerns the topic of arithmetic geometry. We address three different questions and each of the questions in some way is about counting how big some set is or can be.

Arithmetic of affine del Pezzo surfaces
In this thesis integral points on affine del Pezzo surfaces are studied.

Deformations of nodal surfaces
Promotores: P. Stevenhagen, L. van Geemen Copromotor: R.M. van Luijk

Hydrogen dissociation on metal surfaces
Promotor: G. J. Kroes

Steps in gassurface reactions
Heterogeneous catalysis is essential to many industrial applications. These catalysts are often comprised of supported nanoparticles, which contain various different surface sites.

Surfacestructure dependencies in catalytic reactions
Promotor: M.T.M. Koper, CoPromotor: L.B.F. Juurlink

Gassurface reaction dynamics and surface science
The local ordering of atoms at the surface of a metallic particle determines its catalytic activity and selectivity. As energy systems of the future will be based on efficient catalytic conversion of small molecules in closed cycles, we study how structural effects of catalysts can be used to our ad…

Topics in the arithmetic of del Pezzo and K3 surfaces
Promotie

Catalysis and Surface Chemistry
The research aim of the Catalysis and Surface Chemistry group headed by Prof. Marc Koper is to probe and understand chemical reactions on welldefined, mostly single crystalline, surfaces at the molecular level.

Exploring structure dependencies of gassurface interactions with curved single crystals
Curved single crystals provide variable, but welldefined surface structures.

Surface plasmon lasers
Surface plasmons (SPs) are surface waves at the interface between a dielectric and a good metal, and are formed by the interaction between light and the free electrons at the metaldielectric interface. They provide strong field confinement for optical fields, opening new possibilities for enhanced…

Complex multiplication of abelian surfaces
Promotor: Peter Stevenhagen

Beyond the BornOppenheimer Static Surface Model for Molecule Surface Reactions
Several techniques are explored for going beyond the bornoppenheimer static surface model for moleculesurface reactions.

Frontiers in surface scattering simulations
Theorists have recently made substantial progress in simulating reactive moleculemetal surface scattering but still face major challenges. The grand challenge is to develop an approach that enables accurate predictive calculations of reactions involving electronically excited states with potential…

Counting points on surfaces
van Luijk

Bestrijdingsmiddelenatlas (BMA)  Pesticide Atlas of Dutch surface waters
Improving environmental risk assessment of pesticides in surface waters

Geometry and arithmetic of del Pezzo surfaces of degree 1
This thesis contains results on the arithmetic and geometry of del Pezzo surfaces of degree 1.In Chapter 1 we give the necessary background, assuming the reader is familiar with algebraic geometry.

Structure dependence of molecular reactions on surfaces
The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on welldefined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

Water related adsorbates on stepped platinum surfaces
Promotor: M.T.M. Koper, CoPromotor: L.B.F. Juurlink

Counting points on K3 surfaces and other arithmeticgeometric objects
Promotie

MediSURF: Bioactive surfaces for precision medicines
Is it possible to successfully design selfassembling nanoscale protein skeletons for use as a vaccine platform?

molecular dynamics calculations on reactions of molecules with metal surfaces
Promotor: Prof.dr. G.J. Kroes

Towards a chemically accurate description of reactions on metal surfaces
How can we make make accurate predictions for reactions of molecules on metal surfaces?

The structure of a working catalyst: from flat surfaces to nanoparticles
Promotor: Prof.dr. J.W.M. Frenken

Quantum dynamics of dissociative chemisorption of CH4 on metal surfaces
The dissociation of CH4 into CH3 + H on a metal surface is the rate determining step in processes which produce hydrogen, such as steam reforming and catalytic partial oxidation. Ultimately, we want to study the dissociation of methane on Ni(111) and Pt(111) quantum mechanically while taking into account…

MULTIPLY  MULTIscale SENTINEL land surface information retrieval Platform
Aim: To develop and enable application of a practical, flexible, userfriendly platform to provide the scientific community with a tool to generate land surface products and its associated uncertainties and exploit these for dataintensive science.

Towards chemically accurate simulation of moleculesurface reactions
This perspective addresses four challenges facing theorists whose aim is to make quantitatively accurate predictions for reactions of molecules on metal surfaces, and suggests ways of meeting these challenges, focusing on dissociative chemisorption reactions of H2, N2, and CH4.

TAILored surfaces in Operando conditions: structure and Reactivity
This meeting will be devoted to recent advances in the operando investigation of reactivity at surfaces from both experimental and theoretical points of view.

Chemical functionalization of the graphene surface for electrical and electrochemical sensing application
Advanced sensing techniques require graphene with high quality and wellcontrolled surface chemistry.

intermediate pressure and temperature: revisiting the fruit fly of surface science
Promotor: M.T.M. Koper, Copromotors: A.I. Yanson, L.B.F. Juurlink

Unraveling the surface formation of regular and deuterated water in space: a combined laboratory and computational study
Promotor: Prof.dr. H.V.J. Linnartz, CoPromotores: H.M. Cuppen, S. Ioppolo

Photocatalytic redox reactions at the surface of liposomes
Promotor: E. Bouwman, Copromotor: S. Bonnet

Quantum dynamics of dissociative chemisorption of hydrogen and other diatomic molecules on metal surfaces
It is possible to treat the dynamics of the dissociation of hydrogen on metal surfaces quantum mechanically, while taking into account the motion in all six molecular degrees of freedom without making approximations. Because the approximations of neglecting surface phonons and electronhole pair excitation…

Chemically Accurate Simulation of a Prototypical Surface Reaction: H2 Dissociation on Cu(111)
Methods for accurately computing the interaction of molecules with metal surfaces are critical to understanding and thereby improving heterogeneous catalysis.

Surfacestructure dependence of waterrelated adsorbates on platinum
Promotor: M.T.M. Koper, Copromotor: J.B.F. Juurlink

geometry of demixing: A study of lipid phase separation on curved surfaces
Like a mixture of oil and water, lipid membranes separate into two liquid phases.

New generation of graphene biosensors based on smooth surfaces and sharp edges
The surface and the edges of graphene are expected to provide higher sensitivity and specificity in detecting and characterizing single molecules. However fundamental physical limits exist in reaching an ultimate precision in detecting the dynamics of chemical and biological systems. The research in…

'Maths is often way ahead of practical applications'
A secret code that we currently use to send emails securely is based on the maths of a century ago. The geometrical surfaces that Dino Festi studied during his PhD research will perhaps be used in future codes or new physics. PhD defence 5 July.

Semiempirical approach to the simulation of moleculesurface reaction dynamcis
Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.

Surface Reactivity of Activated CO2 Selective use of energy in splitting CO2
Juurlink

Experiments on CHD3 + Pt(111): New Insights into a Prototypical Gas–Surface Reaction
The dissociative chemisorption of methane on metal surfaces is of fundamental and practical interest, being a ratelimiting step in the steam reforming process. The reaction is best modeled with quantum dynamics calculations, but these are currently not guaranteed to produce accurate results because…

Sabine Auras
Wiskunde en Natuurwetenschappen

Electrochemical and surface studies of the effect of naphthalenebased additives on tin electrodeposition
Tin electrodeposition applications have rapidly evolved in the past 25 years.

Skin Deep? Reading the Surfaces of the Body in Ancient Greek Literature and Science
The skin has recently gained attention within body studies for its many specific cultural and social associations, in addition to its biology. This project aims to examine the different layers of meaning and the functions invested in the skin in ancient Greece: how did ancient Greek literary and medical…

Fatfree mayonnaise thanks to manipulation of surface tension
Aqueous solutions of proteins and carbohydrates separate into two parts with an extremely ‘soft’ boundary surface. The surface tension between these two parts can be manipulated, for example by adjusting the pH balance. This can be used to develop emulsions of a waterbased solution in another aqueous…

Studying abstract mathematical equations using tangible surfaces
On January 5, Rosa Winter will obtain her doctorate in arithmetic geometry. She researched solutions of equations that define socalled ‘del Pezzo surfaces’. ‘I like geometry because I can imagine and draw the shapes and objects,’ says Winter. ‘That makes abstract mathematics feel more tangible.’

Surface Plasmons Measured for Faster Internet
Leiden physicists use a new method to measure socalled surface plasmons. Researching these particles could lead to new lightbased technology, including faster internet.

Microswimmers swim faster over slippery surfaces
Tiny selfpropelling spheres, measuring only micrometers, move faster over a hydrophobic silicone surface than they do over hydrophilic glass. 'Almost nobody had realised that the substrate matters', says Stefania Ketzetzi, the researcher who discovered the effect, researched it and explained it. She…