103 citations · 298 across the 16 of their papers we have counts for
14 papers · 1 filter
Controlling Colloidal Flow through a Microfluidic Y-junction
Alexander P. Antonov, Matthew Terkel, Fabian Jan Schwarzendahl +3
Microscopic particles flowing through narrow channels may accumulate near bifurcation points provoking flow reduction, clogging and ultimately chip breakage. Here we show that the…
Motility-induced shear thickening in dense colloidal suspensions
A. Gülce Bayram, Fabian Jan Schwarzendahl, Hartmut Löwen +1
Phase transitions and collective dynamics of active colloidal suspensions are fascinating topics in soft matter physics, particularly for out-of-equilibrium systems, which can lead…
Stability of interlocked self-propelled dumbbell clusters
Fabian Jan Schwarzendahl, Abraham Maulean-Amieva, C. Patrick Royall +1
Combining experimental observations of Quincke roller clusters with computer simulations and a stability analysis, we explore the formation and stability of two interlocked self-pr…
Collective mechano-response dynamically tunes cell-size distributions in growing bacterial colonies
René Wittmann, G. H. Philipp Nguyen, Hartmut Löwen +2
Mechanical stresses stemming from environmental factors are a key determinant of cellular behavior and physiology. Yet, the role of self-induced biomechanical stresses in growing b…
Active particles using reinforcement learning to navigate in complex motility landscapes
Paul A. Monderkamp, Fabian Jan Schwarzendahl, Michael A. Klatt +1
As the length scales of the smallest technology continue to advance beyond the micron scale it becomes increasingly important to equip robotic components with the means for intelli…
Active Colloids in Harmonic Optical Potentials
Ivo Buttinoni, Lorenzo Caprini, Laura Alvarez +2
We study the motion of active patchy colloids in an optical trap using experiments, theory and numerical simulations. To achieve isotropic and harmonic confinement, we prototype mi…
A one-dimensional three-state run-and-tumble model with a `cell cycle'
Davide Breoni, Fabian Jan Schwarzendahl, Ralf Blossey +1
We study a one-dimensional three-state run-and-tumble model motivated by the bacterium Caulobacter crescentus which displays a cell cycle between two non-proliferation mobile phase…
Do active nematic self-mixing dynamics help growing bacterial colonies to maintain local genetic diversity?
Fabian Jan Schwarzendahl, Daniel A. Beller
Recent studies have shown that packings of cells, both eukaryotic cellular tissues and growing or swarming bacterial colonies, can often be understood as active nematic fluids. A k…
Anomalous cooling and overcooling of active systems
Fabian Jan Schwarzendahl, Hartmut Löwen
The phenomenon that a system at a hot temperature cools faster than at a warm temperature, referred to as the Mpemba effect, has been recently realized for trapped colloids. Here,…
Self-organization and shape change by active polarization in nematic droplets
Fabian Jan Schwarzendahl, Pierre Ronceray, Kimberly L. Weirich +1
Active forces occurring within cells can drive crucial biological processes that involve spontaneous organization and shape change, such as cell division. Motivated by recent in vi…
Emergent probability fluxes in confined microbial navigation
Jan Cammann, Fabian Jan Schwarzendahl, Tanya Ostapenko +3
When the motion of a motile cell is observed closely, it appears erratic, and yet the combination of nonequilibrium forces and surfaces can produce striking examples of organizatio…
Percolation transition of pusher-type microswimmers
Fabian Jan Schwarzendahl, Marco G. Mazza
We identify the presence of a continuum percolation transition in model suspensions of pusher-type microswimmers. The clusters dynamically aggregate and disaggregate resulting from…
Hydrodynamic interactions dominate the structure of active swimmers' pair distribution functions
Fabian Jan Schwarzendahl, Marco G. Mazza
Microswimmers often exhibit surprising patterns due to the nonequilibrium nature of their dynamics. Collectively, suspensions of microswimmers appear as a liquid whose properties s…
Maximum in density heterogeneities of active swimmers
Fabian Jan Schwarzendahl, Marco G. Mazza
Suspensions of unicellular microswimmers such as flagellated bacteria or motile algae exhibit spontaneous density heterogeneities at large enough concentrations. Based on the relat…