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Oscillatory driven colloidal binary mixtures: axial segregation versus laning
Adam Wysocki, Hartmut Löwen
Using Brownian dynamics computer simulations we show that binary mixtures of colloids driven in opposite directions by an oscillating external field exhibit axial segregation in sh…
Non-equilibrium melting of colloidal crystals in confinement
Enrique Villanova-Vidal, Thomas Palberg, Hans Joachim Schöpe +1
We report on a novel and flexible experiment to investigate the non-equilibrium melting behaviour of model crystals made from charged colloidal spheres. In a slit geometry polycrys…
Crystalline multilayers of the confined Yukawa system
Erdal Celal Oğuz, René Messina, Hartmut Löwen
The phase diagram of Yukawa particles confined between two parallel hard walls is calculated at zero-temperature beyond the bilayer regime by lattice-sum-minimization. Tuning the s…
Ultra-fast quenching of binary colloidal suspensions in an external magnetic field
Lahcen Assoud, Florian Ebert, Peter Keim +3
An ultra-fast quench is applied to binary mixtures of superparamagnetic colloidal particles confined at a two-dimensional water-air interface by a sudden increase of an external ma…
Aggregation of self-propelled colloidal rods near confining walls
H. H. Wensink, H. Löwen
Non-equilibrium collective behavior of self-propelled colloidal rods in a confining channel is studied using Brownian dynamics simulations and dynamical density functional theory.…
Crystallization of magnetic dipolar monolayers: a density functional approach
Sven van Teeffelen, Hartmut Löwen, Christos N. Likos
We employ density functional theory to study in detail the crystallization of super-paramagnetic particles in two dimensions under the influence of an external magnetic field that…
Dynamical density functional theory with hydrodynamic interactions and colloids in unstable traps
M. Rex, H. Loewen
A density functional theory for colloidal dynamics is presented which includes hydrodynamic interactions between the colloidal particles. The theory is applied to the dynamics of c…
Dynamics of a Brownian circle swimmer
Sven van Teeffelen, Hartmut Löwen
Self-propelled particles move along circles rather than along a straight line when their driving force does not coincide with their propagation direction. Examples include confined…
Colloidal crystal growth at externally imposed nucleation clusters
Sven van Teeffelen, Christos N. Likos, Hartmut Löwen
We study the conditions under which and how an imposed cluster of fixed colloidal particles at prescribed positions triggers crystal nucleation from a metastable colloidal fluid. D…
Binary crystals in two-dimensional two-component Yukawa mixtures
Lahcen Assoud, Rene Messina, Hartmut Loewen
The zero-temperature phase diagram of binary mixtures of particles interacting via a screened Coulomb pair potential is calculated as a function of composition and charge ratio. Th…