Spinodal Phase Separation in Liquid Films with Quenched Disorder

Details Spinodal Phase Separation in Liquid Films with Quenched Disorder Spinodal Phase Separation in Liquid Films with Quenched Disorder

2010-06-08

arxiv.org/abs/1006.1638v1

Phys. Chem. Chem. Phys. 12, 12964 (2010)

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 7 figures

Scientific paper

10.1039/C0CP00776E

We study spinodal phase separation in unstable thin liquid films on chemically disordered substrates via simulations of the thin-film equation. The disorder is characterized by immobile patches of varying size and Hamaker constant. The effect of disorder is pronounced in the early stages (amplification of fluctuations), remains during the intermediate stages and vanishes in the late stages (domain growth). These findings are in contrast to the well-known effects of quenched disorder in usual phase-separation processes, viz., the early stages remain undisturbed and domain growth is slowed down in the asymptotic regime. We also address the inverse problem of estimating disorder by thin-film experiments.

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