81 citations · 371 across the 23 of their papers we have counts for
25 papers
Universal norms of partially de Rham -pairs and perfectness in Lubin--Tate Iwasawa theory
Marvin Schneider, Rustam Steingart
We study the behaviour of partially de Rham Selmer groups of -pairs along abelian -adic Lie extensions. In the cyclotomic case we compare them with the universal norms studie…
Positive Feedback Drives Sharp Swelling of Polymer Brushes near Saturation
Simon Schubotz, Eva Bittrich, Holger Merlitz +4
We resolve the Schröder paradox for PNiPAAm brushes, showing experimentally that swelling at 100\% relative humidity (RH) matches the liquid state. This occurs via a sharp increase…
Experimental and simulation study of resin infiltration in carbon fiber rovings
Dominik Burr, Rudi Reichenbächer, Christina Scheffler +2
Continuous-fiber-reinforced polymers are vital for lightweight structural applications, where fiber-matrix wetting critically influences composite performance. Understanding dynami…
How Microplastics cross the Buoyancy Barrier: A multi-scale Study
Thomas Witzmann, Anja F. R. M. Ramsperger, Hao Liu +12
Microplastics (MPs), though less dense than water, are frequently recovered from sediments in aqueous environments, indicating they can cross the buoyancy barrier. We quantify eco-…
Rheological Insights from the Oscillation Dynamics of Viscoelastic Sessile Drops
Peyman Rostami, Alfonso A. Castrejón-Pita, Günter K. Auernhammer
This study investigates the oscillation behavior of a sessile drop placed on a hydrophobic substrate subjected to vertical vibrations with varying frequencies and amplitudes. We ex…
Dynamic Wetting by Concentrated Granular Suspensions
Reza Azizmalayeri, Peyman Rostami, Thomas Witzmann +2
Many functional materials, such as paints and inks used in applications like coating and 3D printing, are concentrated granular suspensions. In such systems, the contact line dynam…
Coalescence of viscoelastic drops on a solid substrate
Peyman Rostami, Alexander Erb, Reza Azizmalayeri +3
This study investigated the coalescence of polymer solution drops on the solid substrates. When two drops meet at their contact line on a substrate, the liquid bridge connecting th…
Breakup of viscous liquid bridges on solid surfaces
Salar Farokhi, Peyman Rostami, Günter K. Auernhammer +1
The breakup dynamics of viscous liquid bridges on solid surfaces is studied experimentally. It is found that the dynamics bears similarities to the breakup of free liquid bridges i…
How droplets dry on stretched soft substrates
Yixuan Du, Elmar Bonaccurso, Jianwei Guo +4
Liquid droplets usually wet smooth and homogeneous substrates isotropically. Recent research works have revealed that droplets sit, slide and spread anisotropically on uniaxially s…
Electronic Laboratory Notebook: A lazy approach
Simon Schubotz, Moritz Schubotz, Günter K Auernhammer
Good research data management is essential in modern-day lab work. Various solutions exist that are either highly specific or need a significant effort to be customized appropriate…
Repulsive interactions of eco-corona covered microplastic particles quantitatively follow modelling of polymer brushes
Thomas Witzmann, Anja F. R. M. Ramsperger, Simon Wieland +4
Environmental fate and toxicity of microplastic particles is dominated by their surface properties. In the environment an adsorbed layer of biomolecules and natural organic matter…
Concentration Gradients in Evaporating Binary Droplets Probed by Spatially Resolved Raman and NMR Spectroscopy
Alena K. Bell, Jonas Kind, Maximilian Hartmann +7
Understanding the evaporation process of binary sessile droplets is essential for optimizing various technical processes, such as inkjet printing or heat transfer. Liquid mixtures…
Flow profiles near receding three--phase contact lines: Influence of surfactants
Benedikt B. Straub, Henrik Schmidt, Peyman Rostami +5
The dynamics of wetting and dewetting is largely determined by the velocity field near the contact lines. For water drops it has been observed that adding surfactant decreases the…
Versatile high-speed confocal microscopy using a single laser beam
Benedikt B. Straub, David C. Lah, Henrik Schmidt +4
We present a new flexible high speed laser scanning confocal microscope and its extension by an astigmatism particle tracking device (APTV). Many standard confocal microscopes use…
Reversible magnetomechanical collapse: virtual touching and detachment of rigid inclusions in a soft elastic matrix
Mate Puljiz, Shilin Huang, Karl A. Kalina +5
Soft elastic composite materials containing particulate rigid inclusions in a soft elastic matrix are candidates for developing soft actuators or tunable damping devices. The possi…
Forced dynamic dewetting of structured surfaces: Influence of surfactants
Franziska Henrich, Dorota Linke, Hans Martin Sauer +4
We analyse the dewetting of printing plates for gravure printing with well-defined gravure cells. The printing plates were mounted on a rotating horizontal cylinder that is half im…
Forces on rigid inclusions in elastic media and resulting matrix-mediated interactions
Mate Puljiz, Shilin Huang, Günter K. Auernhammer +1
To describe many-particle systems suspended in incompressible low-Reynolds-number fluids, effective hydrodynamic interactions can be introduced. Here, we consider particles embedde…
Buckling of paramagnetic chains in soft gels
Shilin Huang, Giorgio Pessot, Peet Cremer +6
We study the magneto-elastic coupling behavior of paramagnetic chains in soft polymer gels exposed to external magnetic fields. To this end, a laser scanning confocal microscope is…
Measuring contact angle and meniscus shape with a reflected laser beam
T. F. Eibach, D. Fell, H. Nguyen +2
Side-view imaging of the contact angle between an extended planar solid surface and a liquid is problematic. Even when aligning the view perfectly parallel to the contact line, foc…
Compressive consolidation of strongly aggregated particle gels
Ryohei Seto, Robert Botet, Martine Meireles +2
The compressive yield stress of particle gels shows a highly nonlinear dependence on the packing fraction. We have studied continuous compression processes, and discussed the packi…
Restructuring of colloidal aggregates in shear flow: Coupling interparticle contact models with Stokesian dynamics
Ryohei Seto, Robert Botet, Günter K. Auernhammer +1
A method to couple interparticle contact models with Stokesian dynamics (SD) is introduced to simulate colloidal aggregates under flow conditions. The contact model mimics both the…
Experimental analysis of single particle deformations and rotations in colloidal and granular systems
Marcel Roth, Michael Franzmann, Maria D'Acunzi +2
Confocal microscopy of fluorescent labeled particles has been used to study the dynamical and structural properties of colloidal and granular matter in real space. Localization alg…
Colloidal aggregates tested via nanoindentation and simultaneous 3D imaging
Marcel Roth, Carsten Schilde, Philipp Lellig +2
The mechanical properties of aggregated colloids depend on the mutual interplay of inter-particle potentials, contact forces, aggregate structure and material properties of the bar…
Frequency dependent deformation of liquid crystal droplets in an external electric field
Günter K. Auernhammer, Jinyu Zhao, Beate Ullrich +1
Nematic drops suspended in the isotropic phase of the same substance were subjected to alternating electrical fields of varying frequency. The system was carefully kept in the isot…