Berlin 2008 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 29: Poster II
DY 29.63: Poster
Donnerstag, 28. Februar 2008, 16:00–18:00, Poster C
Structure formation in bidisperse ferrofluid monolayers: Theory and Simulations. — •Sofia Kantorovich1,2, Juan Cerda3, and Christian Holm1,3 — 1MPI-P, Ackermannweg 10, D-55128, Mainz, Germany — 2USU, Lenin av. 51, 620083, Ekaterinburg, Russia — 3FIAS, Ruth-Moufang-Str. 1, D-60438, Frankfurt am Main, Germany
Molecular dynamics (MD) and Density functional theory are used to study thoroughly the mircrostructure formation in bidisperse ferrofluid monolayers. The simulation technique is close to the one used for monodisperse monolayers [Cerda et al., JP:CM, in print]. We show, that depending on the particle size ratio dL/dS (where dL(S) stands for the diameter of the Large (Small) particles), the presence of small particles can lead to the poisoning effect observed in 3D [Kantorovich, Ivanov, PRE, 70, 021401,(2004)] and 2D [Klokkenburg et al., private communication] ferrofluid samples with the size ratio dL/dS ∼ 1.5, but also to the cluster growth, when dL/dS > 2 due to the depletion forces. An extensive comparison of theory to the simulation results is provided.