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Crystal nucleation of colloidal hard dumbbells
Ran Ni, Marjolein Dijkstra
Using computer simulations we investigate the homogeneous crystal nucleation in suspensions of colloidal hard dumbbells. The free energy barriers are determined by Monte Carlo simu…
Measuring Colloidal Forces from Particle Position Deviations inside an Optical Trap
Djamel El Masri, Peter van Oostrum, Frank Smallenburg +4
We measure interaction forces between pairs of charged PMMA colloidal particles suspended in a relatively low-polar medium (5 8) directly from the deviations o…
Phase diagrams of colloidal spheres with a constant zeta-potential
Frank Smallenburg, Niels Boon, Maarten Kater +2
We study suspensions of colloidal spheres with a constant zeta-potential within Poisson-Boltzmann theory, quantifying the discharging of the spheres with increasing colloid density…
Heterogeneous Dynamics in Columnar Liquid Crystals of Parallel Hard Rods
Simone Belli, Alessandro Patti, René van Roij +1
In the wake of previous studies on the rattling-and-jumping diffusion in smectic liquid crystal phases of colloidal rods, we analyze here for the first time the heterogeneous dynam…
Phase behavior and structure of colloidal bowl-shaped particles: simulations
Matthieu Marechal, Marjolein Dijkstra
We study the phase behavior of bowl-shaped particles using computer simulations. These particles were found experimentally to form a meta-stable worm-like fluid phase in which the…
Phase Diagrams of Binary Mixtures of Oppositely Charged Colloids
Markus Bier, Rene van Roij, Marjolein Dijkstra
Phase diagrams of binary mixtures of oppositely charged colloids are calculated theoretically. The proposed mean-field-like formalism interpolates between the limits of a hard-sphe…
Glassy dynamics, spinodal fluctuations, and the kinetic limit of hard-rod nucleation
Ran Ni, Simone Belli, Rene van Roij +1
Using simulations we identify three dynamic regimes in supersaturated isotropic fluid states of short hard rods: (i) for moderate supersaturations we observe nucleation of multi-la…
Collective Diffusion of Colloidal Hard Rods in Smectic Liquid Crystals: Effect of Particle Anisotropy
Alessandro Patti, Djamel El Masri, René van Roij +1
We study the layer-to-layer diffusion in smectic-A liquid crystals of colloidal hard rods with different length-to-diameter ratios using computer simulations. The layered arrangeme…
Adsorption Trajectories and Free-Energy Separatrices for Colloidal Particles in Contact with a Liquid-Liquid Interface
J. de Graaf, M. Dijkstra, R. van Roij
We apply the recently developed triangular tessellation technique as presented in [J. de Graaf et al., Phys. Rev. E 80, 051405 (2009)] to calculate the free energy associated with…