Collective dynamics of dipolar and multipolar colloids: from passive to active systems

@article{Klapp2016CollectiveDO,
  title={Collective dynamics of dipolar and multipolar colloids: from passive to active systems},
  author={Sabine H. L. Klapp},
  journal={arXiv: Soft Condensed Matter},
  year={2016}
}
  • S. Klapp
  • Published 30 January 2016
  • Physics
  • arXiv: Soft Condensed Matter
This article reviews recent research on the collective dynamical behavior of colloids with dipolar or multipolar interactions. Indeed, whereas equilibrium structures and static self-assembly of such systems are now rather well understood, the past years have seen an explosion of interest in understanding dynamicals aspects, from the relaxation dynamics of strongly correlated dipolar networks over systems driven by time-dependent, electric or magnetic fields, to pattern formation and dynamical… 

Figures from this paper

Simulations of structure formation by confined dipolar active particles.
TLDR
This work quantifies the type of structures that emerge and how they depend on the self-propulsion speed and the dipolar magnetic strength of the particles and shows that the structural configurations are also affected by the confining walls.
Hierarchical collective motion of a mixture of active dipolar Janus particles and passive charged colloids in two dimensions.
We use computer simulations to study the behavior of a mixture of large passive charged colloids in a suspension of smaller active dipolar Janus particles. We find that when a single charged colloid
Dynamical self-assembly of dipolar active Brownian particles in two dimensions.
TLDR
This work studies the dynamical self-assembly of active Brownian particles with dipole-dipole interactions, stemming from a permanent point dipole at the particle center, and provides arguments for the emergence of the flocking behavior, which is absent in the passive dipolar system.
2D colloids in rotating electric fields: A laboratory of strong tunable three-body interactions.
TLDR
The results demonstrate that colloidal systems in rotating electric fields are a unique laboratory to study the role of many-body interactions in physics of phase transitions and in applications, such as self-assembly, offering exciting opportunities for studying generic phenomena inherent to liquids and solids.
Competing active and passive interactions drive amoebalike crystallites and ordered bands in active colloids.
TLDR
This work parametrize a particulate simulation model which reproduces the experimentally observed phases of a quasi-two-dimensional system of electrically driven particles exhibiting a rich and exotic phase behavior exhibiting passive crystallites, motile crystallite, an active gas, and banding.
Self-assembly of magnetic colloids with radially shifted dipoles.
TLDR
This study shows that dipolar shifts in colloids can serve as a control parameter in applications where unique size, morphology, and aggregation kinetics of clusters are required.
Diagrammatic method for tunable interactions in colloidal suspensions in rotating electric or magnetic fields.
TLDR
It is shown that the interactions and polarization mechanisms governing the tunable interactions can be described, calculated, and analyzed in detail with the diagrammatic method, and the method is of broad interest in condensed matter, chemical physics, physical chemistry, materials science, and soft matter.
Hierarchical assemblies of superparamagnetic colloids in time-varying magnetic fields.
TLDR
The dipolar interactions that govern superparamagnetic colloids in time-varying magnetic fields are described, and how such interactions have guided colloidal assembly into materials with increasing complexity that display novel dynamics.
Steady states of non-axial dipolar rods driven by rotating fields.
TLDR
The structural and dynamical properties of the steady states are analyzed by means of Langevin dynamics simulations as a function of the misalignment of the intrinsic magnetic dipole moment of the rods with respect to their axial direction, and also in terms of the strength and rotation frequency of an external magnetic field.
Multidirectional colloidal assembly in concurrent electric and magnetic fields.
TLDR
This novel methodology of introducing and interpreting double-dipolar particle interactions may assist in the assembly of colloidal coatings, dynamically reconfigurable particle networks, and bidirectional active structures.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 133 REFERENCES
Nonequilibrium condensation and coarsening of field-driven dipolar colloids.
TLDR
It is demonstrated that the clustering described in the driven system arises from a first-order phase transition between a vapor and a condensed phase.
Dynamical arrest in low density dipolar colloidal gels.
TLDR
The relation of gel formation to fluid-fluid phase separation and spinodal decomposition in the light of current knowledge of dipolar fluid phase diagrams is discussed.
Depinning and collective dynamics of magnetically driven colloidal monolayers.
  • P. Tierno
  • Materials Science, Medicine
    Physical review letters
  • 2012
TLDR
It is shown that induced attractive interactions between the moving colloids lead to enhancement of the particle current due to formation of condensed chains traveling along the modulated landscape.
Dynamics of cluster formation in driven magnetic colloids dispersed on a monolayer.
  • S. Jäger, H. Stark, S. Klapp
  • Materials Science, Medicine
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2013
TLDR
This work focuses on the interplay between permanent dipolar and hydrodynamic interactions and its influence on the dynamic behavior of the particles, including their individual as well as their collective motion.
Pattern formation of dipolar colloids in rotating fields: layering and synchronization
We report Brownian dynamics (BD) simulation and theoretical results for a system of spherical colloidal particles with permanent dipole moments in a rotating magnetic field. Performing simulations at
Driving self-assembly and emergent dynamics in colloidal suspensions by time-dependent magnetic fields.
TLDR
This review discusses various methods of driven self-assembly in magnetic suspensions subjected to alternating magnetic fields, and some of the remarkable properties of these novel materials are described.
Theory of Active Suspensions
Active suspensions, of which a bath of swimming microorganisms is a paradigmatic example, denote large collections of individual particles or macromolecules capable of converting fuel into mechanical
Phase diagram of two-dimensional systems of dipole-like colloids
Based on Discontinuous Molecular Dynamics (DMD) simulations we present a phase diagram of two-dimensional nano-particles with dipole-like short-ranged interactions. Similar to systems with true,
Slow relaxation in structure-forming ferrofluids.
  • Aparna Sreekumari, P. Ilg
  • Materials Science, Medicine
    Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2013
TLDR
Drastic changes from chainlike to networklike structures in the absence of an external magnetic field are observed and this crossover plays an important role in the slowing down of dynamics that is reflected in various dynamical properties including the tracer diffusion and the viscosity.
Inverse patchy colloids with small patches: fluid structure and dynamical slowing down.
TLDR
Overall neutral IPCs carrying two, relatively small, polar patches are considered, focusing on both the structure and the dynamics of the fluid phase in a wide region of the phase diagram, which shows good agreement between theoretical and numerical quantities.
...
1
2
3
4
5
...