Denucleation rates during Ostwald ripening: Distribution kinetics of unstable clusters
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چکیده
منابع مشابه
Method for evaluating the Ostwald ripening kinetics of air microbubbles
The stability of foams (and of aerated systems in general) is affected by three basic mechanisms: drainage, Ostwald ripening (also called disproportionation), and coalescence. Ostwald ripening, in particular, refers to the changes in bubble size due to gas diffusion driven by local differences in Laplace pressure, or by gas diffusion to a head space. This process can be strongly influenced by t...
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Low area density Ge/Si(100) hut cluster ensembles are stable during days-long growth temperature anneals. Real-time scanning tunneling microscopy shows that all islands grow slowly at a decreasing rate throughout the anneal. Island growth depletes the Ge supersaturation that, in turn, reduces the island growth rate. A mean-field facet nucleation and growth model quantitatively predicts the obse...
متن کاملHomoepitaxial Ostwald ripening
This paper reports level set simulations of the Ostwald ripening of two-dimensional homoepitaxial islands. The simulation accurately accounts for both adatom diffusion between the islands and adatom attachment/detachment processes at the island edges. We compute the time evolution of the average island size and the full island size distribution function. The results provide support for a previo...
متن کاملPart I: Ostwald ripening theories
The physical basis behind the Ostwald ripening process for two-phase mixture has been reviewed in detail, using the various theories developed to describe this process. The Ostwald ripening, also termed second phase coarsening, is generally thought to be slow, diffusion-controlled process which occurs subsequent to phase separation under extremely small under-saturation levels. The major advanc...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2002
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.1506148