Berlin 2008 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 22: POSTERS Micro- and Nanofluidics
CPP 22.1: Poster
Wednesday, February 27, 2008, 16:00–18:30, Poster A
Kinetic Monte Carlo modeling of the fingering instability of dewetting fronts in nanoparticle suspensions — •Ioan Vancea1, Christopher Martin2, Matthew Blunt2, Emmanuelle Pauliac-Vaujour2, Philip Moriarty2, and Uwe Thiele1,3 — 1Max-Planck-Institut fur Physik komplexer Systeme, Noethnitzer Str. 38, D-01187, Germany — 2School of Physics & Astronomy, The University of Nottingham, University Park, Nottingham, NG7 2RD, UK — 3School of Mathematics, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK
We use a kinetic Monte Carlo simulation of a 2D Lattice Gas Model to show that for a nanoparticle solution that dewets by evaporation the particles induce a strong fingering instability of the dewetting fronts. We analyze the influence of parameters, such as nanoparticle concentration, mobility, chemical potential on the characteristics of the fingering.
Furthermore we discus in detail the role played by nanopaticle-nanoparticle and liquid-nanoparticle interaction strength and distinguish parameter regions where hydrodynamic processes and liquid-particle demixing processes dominate the structure formation.
We acknowledge support by the European Union via the FP6 Marie Curie scheme [Grant MRTN-CT-2004005728 (PATTERNS)].