期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 17, 期 3, 页码 R101-R142出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/17/3/R01
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We review analytical and numerical results for surface-directed spinodal decomposition (SDSD), namely, the interplay of wetting kinetics and phase separation in a binary (AB) mixture in contact with a surface S which prefers one of the components (say, A). Depending on the relative strengths of the A-B, A-S and B-S interactions, the surface is either partially wetted or completely wetted by A in equilibrium. We discuss the theoretical framework for modelling SDSD. and review results obtained from both microscopic and coarse-grained models. We clarify the differences between diffusion-driven SDSD in solids. and SDSD in fluids, where velocity fields play an important role. Furthermore, we discuss the dependence of wetting-layer kinetics on the composition of the mixture. Some results are also presented for phase separation in a confined geometry. e.g., thin films. Finally, we discuss the problem of surface-enrichment kinetics, namely, the kinetics of enrichment of an attracting surface when the bulk mixture is stable. These nonequilibrium processes have important applications in the preparation of nanomaterials and multi-layered structures.
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