Reference : Nucleation in suspensions of anisotropic colloids
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/7735
Nucleation in suspensions of anisotropic colloids
English
Schilling, Tanja mailto [Institut für Physik, Johannes Gutenberg Universität, Mainz, Germany]
Frenkel, Daan [FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands]
2005
Computer Physics Communications
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
169
1-3
117-121
Yes (verified by ORBilu)
International
0010-4655
[en] We report Monte Carlo studies of liquid crystal nucleation in two types of anisotropic colloidal systems: hard rods and hard ellipsoids. In both cases we find that nucleation pathways differ strongly from the pathways in systems of spherical particles. Short hard rods show an effect of self-poisoning. This part of the article is based on a previous publication [T. Schilling, D. Frenkel, Self-poisoning of crystal nuclei in hard-rod liquids, Phys. Rev. Lett. 92 (2004) 085505]. When a crystallite forms, its surfaces are covered preferentially by rods which align perpendicular to the surface. Therefore subsequent growth is stunted. Hard, almost spherical ellipsoids can be compressed to very high densities without crystallization—in contrast to hard spheres, which crystallize easily. When forced to crystallize, ellipsoids form very loosely aggregated nuclei.

In both cases nucleation pathways are complex and it is therefore difficult to define an appropriate reaction coordinate. The common strategies of investigation of nucleation problems (i.e. definition of a coordinate and then sampling barrier crossing with well-known techniques) fail in these systems.
http://hdl.handle.net/10993/7735
10.1016/j.cpc.2005.03.028

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