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Related Experiment Video

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Pattern Generation for Micropattern Traction Microscopy

Pattern Generation for Micropattern Traction Microscopy

Published on: February 17, 2022

Study of contact angle hysteresis using the Cellular Potts Model.

Vahid Mortazavi¹, Roshan M D'Souza, Michael Nosonovsky

¹College of Engineering & Applied Science, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA.

Physical Chemistry Chemical Physics : PCCP

|January 17, 2013

Summary

This study uses the Cellular Potts Model (CPM) to investigate contact angle (CA) hysteresis in multiphase systems. It reveals how surface patterns and droplet/bubble differences influence CA hysteresis, offering new insights into wetting phenomena.

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Area of Science:

Physics
Materials Science
Computational Modeling

Background:

Contact angle (CA) hysteresis is crucial in multiphase systems, affecting phenomena like wetting and adhesion.
Understanding CA hysteresis is complex due to combined effects of surface structure and fluid interfaces.

Purpose of the Study:

To investigate contact angle (CA) hysteresis in solid-liquid-vapour systems using the Cellular Potts Model (CPM).
To differentiate CA hysteresis between droplets and bubbles and analyze its dependence on surface properties.

Main Methods:

Simulated a droplet on a tilted patterned surface and a bubble under a surface in liquid using the Cellular Potts Model (CPM).
Analyzed the dependency of CA hysteresis on surface structure and other relevant parameters.

Main Results:

Demonstrated distinct CA hysteresis behaviors for droplets and bubbles.
Quantified the influence of surface patterns and parameters on CA hysteresis magnitude.
Successfully decoupled 1D (triple line pinning) and 2D (adhesion hysteresis) contributions.

Conclusions:

The Cellular Potts Model (CPM) provides valuable insights into the mechanisms of CA hysteresis.
Distinguishing between droplet and bubble behavior is essential for accurate CA hysteresis analysis.
The study offers a novel approach to understanding wetting phenomena by separating different sources of hysteresis.