Patrick Ilg
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View article: Time is Length in Self-Similar Logarithmic Aging of Physically Cross-Linked Semiflexible Polymer Networks
Time is Length in Self-Similar Logarithmic Aging of Physically Cross-Linked Semiflexible Polymer Networks Open
Physical aging in polymers is a fundamental yet poorly understood phenomenon, as diverse macromolecular systems exhibit remarkably similar slow dynamics. Through molecular dynamics simulations of physically cross-linked networks composed o…
View article: Analytic solution for the nonlinear response of magnetic nanoparticles to large-amplitude oscillatory fields
Analytic solution for the nonlinear response of magnetic nanoparticles to large-amplitude oscillatory fields Open
Nonlinear responses of physical systems to strong perturbations are notoriously difficult to tackle analytically. Here, we present analytic results for the nonlinear response of magnetic nanoparticles to large-amplitude oscillatory magneti…
View article: Ultra-slow self-similar coarsening of physical fibrillar gels formed by semiflexible polymers
Ultra-slow self-similar coarsening of physical fibrillar gels formed by semiflexible polymers Open
The coarsening dynamics of fibrillar networks is modeled using a bead-spring chain approach. Chain rigidity and cohesive interactions drive the transition from droplet formation to percolated network structures, quantified by various struc…
View article: Ultra-Slow Self-Similar Coarsening of Physical Fibrillar Gels Formed by Semiflexible Polymers
Ultra-Slow Self-Similar Coarsening of Physical Fibrillar Gels Formed by Semiflexible Polymers Open
Biopolymers tend to form fibrils that self-assemble into open network structures. While permanently crosslinked flexible polymers are relatively well understood, structure--property relationships of open networks and pseudo-gels formed by …
View article: Medium Amplitude Field Susceptometry (MAFS) for magnetic nanoparticles
Medium Amplitude Field Susceptometry (MAFS) for magnetic nanoparticles Open
The linear dynamic susceptibility is arguably the most important property to specify the magnetization dynamics of a given system. Therefore, this quantity has been studied in great detail and the corresponding measurements known as suscep…
View article: Magneto-Permeability Effect in Ferrofluid Flow Through Porous Media Studied via Multiparticle Collision Dynamics
Magneto-Permeability Effect in Ferrofluid Flow Through Porous Media Studied via Multiparticle Collision Dynamics Open
As more and more promising applications of magnetic nanoparticles in complicated environments are explored, their flow properties in porous media are of increasing interest. We here propose a hybrid approach based on the multiparticle coll…
View article: Magneto-Permeability Effect in Ferrofluid Flow through Porous Media studied via Multiparticle Collision Dynamics
Magneto-Permeability Effect in Ferrofluid Flow through Porous Media studied via Multiparticle Collision Dynamics Open
As more and more promising applications of magnetic nanoparticles in complicated environments are explored, their flow properties in porous media are of increasing interest. We here propose a hybrid approach based on the Multiparticle Coll…
View article: Longest relaxation time versus maximum loss peak in the field-dependent longitudinal dynamics of suspended magnetic nanoparticles
Longest relaxation time versus maximum loss peak in the field-dependent longitudinal dynamics of suspended magnetic nanoparticles Open
Magnetic nanoparticles in suspensions provide fascinating model systems to study field-induced effects. Their response to external fields also opens up promising new applications, e.g. in hyperthermia. Despite significant research efforts,…
View article: Combined dynamics of magnetization and particle rotation of a suspended superparamagnetic particle in the presence of an orienting field: Semi-analytical and numerical solution
Combined dynamics of magnetization and particle rotation of a suspended superparamagnetic particle in the presence of an orienting field: Semi-analytical and numerical solution Open
The magnetization dynamics of suspended superparamagnetic particles is governed by internal Néel relaxation as well as Brownian diffusion of the whole particle. We here present semi-analytical and numerical solutions of the kinetic equatio…
View article: Multiparticle Collision Dynamics for Ferrofluids
Multiparticle Collision Dynamics for Ferrofluids Open
Detailed studies of the intriguing field-dependent dynamics and transport properties of confined flowing ferrofluids require efficient mesoscopic simulation methods that account for fluctuating ferrohydrodynamics. Here, we propose such a n…
View article: Surface Rheology and Structure of Model Triblock Copolymers at a Liquid–Vapor Interface: A Molecular Dynamics Study
Surface Rheology and Structure of Model Triblock Copolymers at a Liquid–Vapor Interface: A Molecular Dynamics Study Open
The structure and surface rheology of two model symmetric triblock copolymers with different degrees of hydrophobicity but identical polymerization degree, spread at an explicit liquid/vapor interface, are investigated employing extensive …
View article: Dynamics of interacting magnetic nanoparticles: effective behavior from competition between Brownian and Néel relaxation
Dynamics of interacting magnetic nanoparticles: effective behavior from competition between Brownian and Néel relaxation Open
We identify the influence of dipolar and steric interactions on the Brownian and Néel contributions to the magnetization dynamics of magnetic nanoparticles from extensive computer simulations using a combined Brownian dynamics/Monte-Carlo …
View article: Combined Experimental and Simulation Studies of Cross-Linked Polymer Brushes under Shear
Combined Experimental and Simulation Studies of Cross-Linked Polymer Brushes under Shear Open
We have studied the effect of cross-linking on the tribological behavior of polymer brushes using a combined experimental and theoretical approach. Tribological and indentation measurements on poly(glycidyl methacrylate) brushes and gels i…
View article: Magnetic susceptibility, nanorheology, and magnetoviscosity of magnetic nanoparticles in viscoelastic environments
Magnetic susceptibility, nanorheology, and magnetoviscosity of magnetic nanoparticles in viscoelastic environments Open
While magnetic nanoparticles suspended in Newtonian solvents (ferrofluids) have been intensively studied in recent years, the effects of viscoelasticity of the surrounding medium on the nanoparticle dynamics are much less understood. Here …
View article: Time correlation functions in the Lebwohl-Lasher model of liquid crystals
Time correlation functions in the Lebwohl-Lasher model of liquid crystals Open
Time correlation functions in the Lebwohl-Lasher model of nematic liquid crystals are studied using theory and molecular dynamics simulations. In particular, the autocorrelation functions of angular momentum and nematic director fluctuatio…
View article: Influence of Chain Stiffness, Grafting Density and Normal Load on the Tribological and Structural Behavior of Polymer Brushes: A Nonequilibrium-Molecular-Dynamics Study
Influence of Chain Stiffness, Grafting Density and Normal Load on the Tribological and Structural Behavior of Polymer Brushes: A Nonequilibrium-Molecular-Dynamics Study Open
We have performed coarse-grained molecular-dynamics simulations on both flexible and semiflexible multi-bead-spring model polymer brushes in the presence of explicit solvent particles, to explore their tribological and structural behaviors…