Reference : Nucleation in Hard Spheres Systems |
Scientific Presentations in Universities or Research Centers : Scientific presentation in universities or research centers | |||
Physical, chemical, mathematical & earth Sciences : Physics | |||
http://hdl.handle.net/10993/7286 | |||
Nucleation in Hard Spheres Systems | |
English | |
Dorosz, Sven ![]() | |
7-Feb-2012 | |
National | |
Seminar des Graduiertenkollegs | |
7 February 2012 | |
Department of Physics, Saarland University | |
Saarbruecken | |
Germany | |
[en] Nucleation ; Template ; Hard Spheres | |
[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. | |
University of Luxembourg | |
Fonds National de la Recherche - FnR | |
Researchers ; Students | |
http://hdl.handle.net/10993/7286 |
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