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The nucleation mechanisms behind crystallized products remain mysterious. In this communication, we describe experiments performed using small volumes, microdroplets, to control nucleation and thus product properties. The effect of small-volume systems on nucleation is discussed.
This is a review of the wetting properties of solid helium on various solid substrates. Due to its extreme purity and to its very fast growth dynamics, solid helium 4 is often considered as a model system in materials science. Several wetting phenomena have been studied with helium 4 crystals, namely contact angles on solid substrates with variable roughness, wetting on graphite where epitaxial growth...
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