Varnik, F.: Complex rheology of a simple model glass: Shear thinning, dynamic versus static yielding and flow heterogeneity. Institut für theoretische Physik, University of Düsseldorf, Germany (2005)
Varnik, F.: Stress fluctuations, static yield stress and shear banding in a flowing Lennard-Jones glass. SPIE conference on Fluctuation and Noise in Materials, Maspalomas, Gran Canaria, Spain (2004)
Varnik, F.: The static yield stress and flow heterogeneity in a model glass: A molecular dynamics study. International workshop on dynamics in viscous liquids, München, Germany (2004)
Varnik, F.: Etude par dynamique moléculaire de l’écoulement dans les systèmes amorphes. Laboratoire de Physique de la Matière Condensée, Université Claude Bernard Lyon 1, Lyon, France (2004)
Varnik, F.: Yield stress and shear banding in a flowing Lennard-Jones glass: A molecular dynamics study. Seminar talk at Laboratoire de Physico-Chimie Théorique, ESPCI, Paris, France (2003)
Varnik, F.: Rhéologie non-linéaire d’un modèle simple: La bande de cisaillement et la dynamique locale. Deuxième Journée de Modélisation Moléculaire des Polymères et des Matériaux Amorphes, Université Paris Sud, Orsay, France (2003)
Varnik, F.: Confinement effects on the slow dynamics of a supercooled polymer melt: Rouse modes and the incoherent scattering function. 2nd International Workshop on Dynamics in Confinement, Grenoble, France (2003)
Varnik, F.: Résultats de simulations de dynamique moléculaire sur la dynamique vitreuse d’un système de polymères. Seminar at Laboratoire de Chimie-Physique, Université Paris Sud, Orsay, France (2001)
Varnik, F.: Effects of the confinement on the glass transition in thin polymer films. 28th International Conference on Dynamical Properties of Solids (DYPROSO XXVIII), Kerkrade, The Netherlands (2001)
Varnik, F.: Measurements of moments for diffracted laser beams: Comparison with theory. 4-th International Conference on Laser Beam and Optics Characterization (LBOC), München, Germany (1997)
The wide tunability of the fundamental electronic bandgap by size control is a key attribute of semiconductor nanocrystals, enabling applications spanning from biomedical imaging to optoelectronic devices. At finite temperature, exciton-phonon interactions are shown to exhibit a strong impact on this fundamental property.
Enabling a ‘hydrogen economy’ requires developing fuel cells satisfying economic constraints, reasonable operating costs and long-term stability. The fuel cell is an electrochemical device that converts chemical energy into electricity by recombining water from H2 and O2, allowing to generate environmentally-friendly power for e.g. cars or houses…
The project Hydrogen Embrittlement Protection Coating (HEPCO) addresses the critical aspects of hydrogen permeation and embrittlement by developing novel strategies for coating and characterizing hydrogen permeation barrier layers for valves and pumps used for hydrogen storage and transport applications.
In this project we conduct together with Dr. Sandlöbes at RWTH Aachen and the department of Prof. Neugebauer ab initio calculations for designing new Mg – Li alloys. Ab initio calculations can accurately predict basic structural, mechanical, and functional properties using only the atomic composition as a basis.
Efficient harvesting of sunlight and (photo-)electrochemical conversion into solar fuels is an emerging energy technology with enormous promise. Such emerging technologies depend critically on materials systems, in which the integration of dissimilar components and the internal interfaces that arise between them determine the functionality.
In this project, we work on the use of a combinatorial experimental approach to design advanced multicomponent multi-functional alloys with rapid alloy prototyping. We use rapid alloy prototyping to investigate five multicomponent Invar alloys with 5 at.% addition of Al, Cr, Cu, Mn and Si to a super Invar alloy (Fe63Ni32Co5; at.%), respectively…
This study investigates the mechanical properties of liquid-encapsulated metallic microstructures created using a localized electrodeposition method. By encapsulating liquid within the complex metal microstructures, we explore how the liquid influences compressive and vibrational characteristics, particularly under varying temperatures and strain…
In this project we study - together with the department of Prof. Neugebauer and Dr. Sandlöbes at RWTH Aachen - the underlying mechanisms that are responsible for the improved room-temperature ductility in Mg–Y alloys compared to pure Mg.