Thermodynamics of crystal nucleation in multicomponent droplets: Adsorption, dissociation, and surface-stimulated nucleation

A thermodynamic theory, based on the capillarity approximation, for the reversible work of formation of a crystal nucleus in a supercooled single component melt is presented. Thus, the work of nucleus formation at the melt surface to that within its volume is evaluated and compared to determine the condition under which surface nucleation is thermodynamically favored over bulk phase nucleation. This thermodynamic condition is identical to the condition of partial wetting of at least one of the crystal facets by the melt.