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Related Experiment Video

Updated: Dec 13, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

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Interpretation of interfacial interactions between lenticular particles.

Kyu Hwan Choi¹, Daeyeon Lee², Bum Jun Park¹

¹Department of Chemical Engineering, Kyung Hee University, Yongin, Gyeonggi-do 17104, South Korea.

Journal of Colloid and Interface Science

|July 27, 2020

Summary

This summary is machine-generated.

Charged lenticular particles at fluid interfaces adopt configurations influenced by geometry. Capillary attraction dominates interactions when the interface contacts specific boundaries, affecting particle behavior.

Keywords:

Attachment energy Capillary attraction Fluid–fluid interface Interfacial configuration Non-spherical particle Optical trapping

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Area of Science:

Colloid and Surface Science
Soft Matter Physics
Interfacial Phenomena

Background:

Geometric features of charged particles at fluid-fluid interfaces significantly impact their configurations and interactions.
Lenticular particles, with both spherical and nonspherical characteristics, offer a unique model for studying interfacial phenomena.

Purpose of the Study:

To investigate the relationship between particle configuration and interactions for lenticular particles at an oil-water interface.
To understand how particle geometry influences electrostatic and capillary forces at interfaces.

Main Methods:

Preparation of three types of lenticular particles via seeded emulsion polymerization.
Direct measurement of pair interactions at the oil-water interface using optical laser tweezers.
Numerical calculation of particle-interface attachment energy to predict configuration behavior.

Main Results:

Lenticular particles exhibit stochastic adoption of either upright or inverted configurations.
Capillary attraction becomes dominant when the interface contacts truncated or biconvex boundaries.
Contact probability correlates with attachment energy, capillary attraction, and electrostatic repulsion.

Conclusions:

Particle configuration at the interface is stochastically determined and influenced by geometric features.
Capillary forces play a crucial role in lenticular particle interactions, especially at specific boundary contacts.
Understanding these interactions is key for controlling particle assembly and behavior at interfaces.