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Dynamics of atoms in a condensing cluster
1Laboratoire de Physique de la Matière Condensée, CNRS 6622, Parc Valrose, F-06108 Nice Cedex 2, France. tenbosch@unice.fr
Summary
This study reveals how single atoms condense into clusters from vapor. Surface pressure drives atoms inward, while diffusion dominates within the cluster core.
Area of Science:
- Physics
- Chemical Engineering
- Materials Science
Background:
- Condensation is a critical phase transition in various natural and industrial processes.
- Understanding particle dynamics during nucleation is essential for controlling material properties.
Purpose of the Study:
- To investigate the kinetic dynamics of single particles during cluster formation from supersaturated vapor.
- To elucidate the flow field and particle motion in and around a growing cluster.
Main Methods:
- A kinetic approach was employed to model particle behavior.
- Analysis of the flow field, mean square displacement, and velocity correlation.
Main Results:
- Distinct flow fields were identified in the cluster core and interfacial regions.
- Surface pressure induces radial motion and inward drift of atoms.
- Particle diffusion is free within the core and high in the surrounding low-density vapor.
Conclusions:
- The kinetic model provides insights into the multi-stage dynamics of cluster condensation.
- Results align with molecular dynamics simulations for nucleating argon clusters.