Multicomponent nucleation: thermodynamically consistent description of the nucleation work

Area of Science:

• Physical Chemistry
• Thermodynamics
• Materials Science

Background:

• Classical nucleation theory often oversimplifies nucleation processes in complex systems.
• Understanding homogeneous nucleation is crucial for predicting phase transitions.

Purpose of the Study:

• To derive a thermodynamically consistent formula for nucleation work in multicomponent systems.
• To analyze the properties of nuclei defined by a conservative dividing surface.
• To investigate the curvature dependence of surface tension in nucleating systems.

Main Methods:

• Derivation of nucleation work formula using a conservative dividing surface.
• Calculation of nucleus radius based on different surface definitions.
• Determination of surface tension's dependence on nucleus curvature.

Main Results:

• A thermodynamically consistent formula for multicomponent nucleation work is established.
• Expressions for nucleus radius and curvature-dependent surface tension are provided.
• The derived model shows higher nucleation rates compared to classical nucleation theory when sigmaT <= sigma0.

Conclusions:

• The new formula offers a more accurate description of homogeneous nucleation in multicomponent systems.
• The findings are applicable to various phase transitions, including unary liquids/solids in mixtures.
• This work advances the understanding of nucleation phenomena beyond classical approximations.