3k citations · 10.1k across the 73 of their papers we have counts for
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Average negative heat in a non-Markovian bath
Felix Ginot, Clemens Bechinger
We experimentally study the motion of a colloidal particle, translated back and forth within a viscoelastic, i.e. non-Markovian bath. The particle starts in equilibrium before the…
Universal symmetry of optimal control at the microscale
Sarah A. M. Loos, Samuel Monter, Felix Ginot +1
Optimizing the energy efficiency of driving processes provides valuable insights into the underlying physics and is of crucial importance for numerous applications, from biological…
Memory-induced alignment of colloidal dumbbells
Karthika Krishna Kumar, Juliana Caspers, Félix Ginot +2
When a colloidal probe is forced through a viscoelastic fluid which is characterized by a long stress-relaxation time, the fluid is excited out of equilibrium. This is leading to a…
Memory induced Magnus effect
Xin Cao, Debankur Das, Niklas Windbacher +3
Spinning objects which move through air or liquids experience a Magnus force. This effect is commonly exploited in ball sports but also of considerable importance for applications…
Frictionless nanohighways on crystalline surfaces
Emanuele Panizon, Andrea Silva, Xin Cao +5
The understanding of friction at nano-scales, ruled by the regular arrangement of atoms, is surprisingly incomplete. Here we provide a unified understanding by studying the interlo…
How are mobility and friction related in viscoelastic fluids?
Juliana Caspers, Nikolas Ditz, Karthika Krishna Kumar +4
The motion of a colloidal probe in a viscoelastic fluid is described by friction or mobility, depending on whether the probe is moving with a velocity or feeling a force. While the…
Surface melting of a colloidal glass
Li Tian, Clemens Bechinger
Despite their technological relevance, a full microscopic understanding of glasses is still lacking. This applies even more to their surfaces whose properties largely differ from t…
Force generation in confined active fluids: The role of microstructure
Shuvojit Paul, Ashreya Jayaram, N Narinder +2
We experimentally determine the force exerted by a bath of active particles onto a passive probe as a function of its distance to a wall and compare it to the measured averaged den…
Moiré-pattern evolution couples rotational and translational friction at crystalline interfaces
Xin Cao, Andrea Silva, Emanuele Panizon +4
The sliding motion of objects is typically governed by their friction with the underlying surface. Compared to translational friction, however, rotational friction has received muc…
Recoil experiments determine the eigenmodes of viscoelastic fluids
Félix Ginot, Juliana Caspers, Luis Frieder Reinalter +3
We experimentally investigate the recoil dynamics of a colloidal probe particle after shearing it with constant velocity through a viscoelastic fluid. The recoil displays two disti…
Barrier crossing in a viscoelastic bath
Félix Ginot, Juliana Caspers, Matthias Krüger +1
We investigate the hopping dynamics of a colloidal particle across a potential barrier and within a viscoelastic, i.e., non-Markovian bath, and report two clearly separated time sc…
Pervasive orientational and directional locking at geometrically heterogeneous sliding interfaces
Xin Cao, Emanuele Panizon, Andrea Vanossi +3
Understanding the drift motion and dynamical locking of crystalline clusters on patterned substrates is important for the diffusion and manipulation of nano- and micro-scale object…
Two step micro-rheological behavior in a viscoelastic fluid
Rohit Jain, Félix Ginot, Johannes Berner +2
We perform micro-rheological experiments with a colloidal bead driven through a viscoelastic worm-like micellar fluid and observe two distinctive shear thinning regimes, each of th…
Autonomously Probing Viscoelasticity in Disordered Suspensions
Clara Abaurrea-Velasco, Celia Lozano, Clemens Bechinger +1
Recent experiments show a strong rotational-diffusion enhancement for self-propelled microrheological probes in colloidal glasses. Here, we provide microscopic understanding using…
The 2019 Motile Active Matter Roadmap
Gerhard Gompper, Roland G. Winkler, Thomas Speck +34
Activity and autonomous motion are fundamental in living and engineering systems. This has stimulated the new field of active matter in recent years, which focuses on the physical…
Properties of a nonlinear bath: Experiments, theory, and a stochastic Prandtl-Tomlinson model
Boris Müller, Johannes Berner, Clemens Bechinger +1
A colloidal particle is a prominent example of a stochastic system, and, if suspended in a simple viscous liquid, very closely resembles the case of an ideal random walker. A varie…
Active particles in geometrically confined viscoelastic fluids
N Narinder, Juan Ruben Gomez-Solano, Clemens Bechinger
We experimentally study the dynamics of active particles (APs) in a viscoelastic fluid under various geometrical constraints such as flat walls, spherical obstacles and cylindrical…
Propagating Density Spikes in Light-Powered Motility-Ratchets
Celia Lozano, Benno Liebchen, Borge ten Hagen +2
Combining experiments and computer simulations, we use a spatially periodic and flashing light-field to direct the motion of phototactic active colloids. Here, the colloids self-or…
Colloidal Brazil nut effect in microswimmer mixtures induced by motility contrast
Soudeh Jahanshahi, Celia Lozano, Borge ten Hagen +2
We numerically and experimentally study the segregation dynamics in a binary mixture of microswimmers which move on a two-dimensional substrate in a static periodic triangular-like…
Memory-induced transition from a persistent random walk to circular motion for achiral microswimmers
N Narinder, Clemens Bechinger, Juan Ruben Gomez-Solano
We experimentally study the motion of light-activated colloidal microswimmers in a viscoelastic fluid. We find that, in such a non-Newtonian environment, the active colloids underg…
Experimental observation of the Aubry transition in two-dimensional colloidal monolayers
T. Brazda, A. Silva, N. Manini +4
The possibility to achieve entirely frictionless, i.e. superlubric, sliding between solids, holds enormous potential for the operation of mechanical devices. At small length scales…
Oscillating Modes of Driven Colloids in Overdamped Systems
Johannes Berner, Boris Müller, Juan Ruben Gomez-Solano +2
Microscopic particles suspended in liquids are the prime example of an overdamped system because viscous forces dominate over inertial effects. Apart from their use as model system…
Run-and-Tumble-Like Motion of Active Colloids in Viscoelastic Media
Celia Lozano, Juan Ruben Gomez-Solano, Clemens Bechinger
Run-and-tumble (RNT) motion is a prominent locomotion strategy employed by many living microorganisms. It is characterized by straight swimming intervals (runs), which are interrup…
Tuning the motility and directionality of self-propelled colloids
Juan Ruben Gomez-Solano, Sela Samin, Celia Lozano +3
Microorganisms are able to overcome the thermal randomness of their surroundings by harvesting energy to navigate in viscous fluid environments. In a similar manner, synthetic coll…