Modeling of chemically active particles at an air-liquid interface

TL;DR

This paper presents a minimal theoretical model for chemically active particles at an air-liquid interface, capturing their self-organized states driven by hydrodynamic, capillary, and Marangoni effects.

Contribution

It introduces a novel minimal model that integrates multiple physical interactions to explain self-organization of active particles at interfaces.

Findings

Successfully reproduces various self-organized states

Identifies key physical interactions driving particle behavior

Provides a framework for understanding active particle dynamics

Abstract

The collective motion of chemically active particles at an air-liquid interface is studied theoretically as a dynamic self-organization problem. Based on a physical consideration, we propose a minimal model for self-propelled particles by combining hydrodynamic interaction, capillary interaction, driving force by Marangoni effect, and Marangoni flow. Our model has successfully captured the features of chemically active particles, that represent dynamic self-organized states such as crystalline, chain, liquid-like and spreading states.