# Kinetics of Surface Enrichment: A Molecular Dynamics Study

Source: [Kinetics of Surface Enrichment: A Molecular Dynamics Study](<https://www.sota2.com/research/paper/68fa29cd1e209131ce837461>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:53:06.183Z

Authors: Prabhat K. Jaiswal, Sanjay Puri, Subir K. Das

Published: 2010-11-29T17:01:31.000Z

## Abstract

We use molecular dynamics (MD) to study the kinetics of surface enrichment (SE) in a stable homogeneous mixture (AB), placed in contact with a surface which preferentially attracts A. The SE profiles show a characteristic double-exponential behavior with two length scales: \\xi\_-, which rapidly saturates to its equilibrium value, and \\xi\_+, which diverges as a power-law with time (\\xi\_+ \\sim t^\\theta). We find that hydrodynamic effects result in a crossover of the growth exponent from \\theta \\simeq 0.5 to \\theta \\simeq 1.0. There is also a corresponding crossover in the growth dynamics of the SE-layer thickness.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1011.6290>)

[PDF](<https://arxiv.org/pdf/1011.6290.pdf>)