Dewetting of thin films on heterogeneous substrates: Pinning vs. coarsening

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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 the critical dewetting mode, weak heterogeneities are sufficient for pinning. A large region of coexistence between coarsening dynamics and pinning is found.
4 pages, 4 figures

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/18636

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0112156
 http://arxiv.org/abs/cond-mat/0112156
 Phys. Rev. E 66, 011602 (2002)
 doi:10.1103/PhysRevE.66.011602

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arXiv