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Updated: Feb 13, 2026
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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
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Wetting, meniscus structure, and capillary interactions of microspheres bound to a cylindrical liquid interface
Paul Y Kim1, Anthony D Dinsmore, David A Hoagland
1Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA. russell@mail.pse.umass.edu hoagland@mail.pse.umass.edu.
Soft Matter
|March 1, 2018
Summary
Polystyrene microspheres on liquid interfaces reveal unexpected wetting behaviors and strong capillary interactions. These findings suggest interfacial assembly could create ordered 2D particle structures.
Area of Science:
- Colloid and Surface Science
- Soft Matter Physics
- Materials Science
Background:
- Understanding wetting and capillary forces is crucial for controlling particle assembly.
- Liquid interfaces with patterned substrates offer tunable curvature for studying interfacial phenomena.
Purpose of the Study:
- To investigate wetting, meniscus structure, and capillary interactions of polystyrene microspheres on cylindrical liquid interfaces.
- To explore the influence of sphere diameter, contact angle, and interfacial curvature on these phenomena.
Main Methods:
- Utilized optical interferometry and optical microscopy to study microsphere behavior.
- Employed patterned silicon substrates to create controlled liquid interface curvatures.
Main Results:
- Observed menisci with quadrupolar symmetry, generally matching theoretical predictions for sphere diameter and contact angle.
- Found unexpected local variations in contact angle and deviations from predicted interfacial deformation.
- Demonstrated quadrupole-quadrupole interactions leading to square sphere packings.
Conclusions:
- Interfacial assembly of particles on curved liquid interfaces presents a novel route to hierarchical 2D structures.
- Discrepancies between experimental results and theory highlight areas for further investigation in interfacial physics.
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