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Brusch, Lutz; Kühne, Heiko; Thiele, Uwe; Bär, Markus
Physical review. E, Statistical, nonlinear, and soft matter physics, 07/2002, Volume: 66, Issue: 1 Pt 1Journal Article
We study a model for a thin liquid film dewetting from a periodic heterogeneous substrate (template). The amplitude and periodicity of a striped template heterogeneity necessary to obtain a stable periodic stripe pattern, i.e., pinning, are computed. This requires a stabilization of the longitudinal and transversal modes driving the typical coarsening dynamics during dewetting of a thin film on a homogeneous substrate. If the heterogeneity has a larger spatial period than that of the critical dewetting mode, weak heterogeneities are sufficient for pinning. Our results imply a large region of coexistence between coarsening dynamics and pinning.
