Nucleation in Hard Spheres Systems

Dorosz, Sven

Reference : Nucleation in Hard Spheres Systems


	Document type :	Scientific Presentations in Universities or Research Centers : Scientific presentation in universities or research centers
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/7286

Title :	Nucleation in Hard Spheres Systems
Language :	English
Author, co-author :	Dorosz, Sven [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Publication date :	7-Feb-2012
Audience :	National
Event name :	Seminar des Graduiertenkollegs
Event date :	7 February 2012
Event organizer :	Department of Physics, Saarland University
Event place (city) :	Saarbruecken
Event country :	Germany
Keywords :	[en] Nucleation ; Template ; Hard Spheres
Abstract :	[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.
Research centres :	University of Luxembourg
Funders :	Fonds National de la Recherche - FnR
Target :	Researchers ; Students
Permalink :	http://hdl.handle.net/10993/7286

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Open access	vortrag_SB_2012.pdf		Author preprint	7.09 MB	View/Open

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