[en] I will be discussing the nucleation process in a system composed of mono-disperse
hard spheres initially in an over-compressed fluid state. Molecular dynamics
simulations are presented for the homogeneous system and the dynamics and
structure of the forming nucleus including the corresponding nucleation rates are
discussed. In comparison to the studied homogenous nucleation event we will
extend this system and introduce a substrate to study its influence onto nucleation
within the fluid. In this case the substrate is made up of the same type of spheres
held fixed in space throughout the simulation process on a triangular lattice modeling
a crystalline surface. In general heterogenous nucleation, due to surfaces, walls as
well as confinement are of great importancein experiments of colloidal
suspensionsbecause strong effects are observed. In our case the substrates
influence is studied by varying the substrate lattice constant as well as the fluid
density. We observe qualitatively different dynamical regimes that will be discussed
in detail.
Disciplines :
Physics
Author, co-author :
DOROSZ, Sven ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
