Dresden 2009 – wissenschaftliches Programm
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SYSO: Symposium Self-organizing Surfaces and Interfaces
SYSO 3: Self-Organizing Surfaces and Interfaces - Posters
SYSO 3.6: Poster
Mittwoch, 25. März 2009, 17:30–19:30, P3
Dewetting of colloidal solutions: Kinetic Monte Carlo model vs. Dynamical Density Functional Theory — Ioan Vancea1, Mark Robbins1, Andrew Archer1, •Uwe Thiele1, Andrew Stannard2, Emmanuelle Pauliac-Vaujour2, Christopher Martin2, Matthew Blunt2, and Philip Moriarty2 — 1Department of Mathematical Sciences, Loughborough University, UK — 2The School of Physics and Astronomy, University of Nottingham, UK
We employ a kinetic Monte Carlo (KMC) model [1-3] and a Dynamical Density Functional Theory (DDFT) [4] to model the evaporative dewetting of a nanoscopic postcursor film of nanoparticle solution that stays behind a mesoscopic convective dewetting front [2,5]. With the KMC model we study the influence of the particles on (i) spinodal dewetting and nucleation processes, and (ii) the transverse instability of the dewetting front. The DDFT describes the dynamics of both - nanoparticle and liquid - densities. As compared to the purely 2d KMC it allows to model the evaporation/condensation of the solvent and its transport within the layer. The theories are compared in the spinodal and metastable parameter region as well as for unstable dewetting fronts.
[1] E. Rabani et al, Nature 426, 271 (2003)
[2] C. P. Martin et al, Phys. Rev. Lett., 99 116103 (2007)
[3] I. Vancea et al, Phys. Rev. E , 78 041601(2008)
[4] A.J. Archer, M. J. Robbins and U. Thiele, in preparation
[5] E. Pauliac-Vaujour et al, Phys. Rev. Lett., 100 176102 (2008)