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Related Experiment Video

Updated: Nov 21, 2025

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

Top-Down Heterogeneous Colloidal Engineering Using Capillary Assembly of Liquid Particles.

Cicely Shillingford¹, Brandon M Kim¹, Marcus Weck¹

¹Molecular Design Institute and Department of Chemistry, New York University, New York, New York 10003, United States.

|January 13, 2021

Summary

This summary is machine-generated.

Capillary assembly of liquid particles (CALP) is a novel microfabrication technique. This method engineers diverse, complex polymer colloids with unique shapes and functionalities for advanced materials.

Keywords:

Janus particles capillary assembly colloids liquid particles patchy particles

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Area of Science:

Materials Science
Colloid Science
Microfabrication

Background:

Colloids are essential building blocks for advanced materials.
Engineering complex colloidal structures with precise control remains a challenge.

Purpose of the Study:

To demonstrate the versatility of Capillary Assembly of Liquid Particles (CALP) for fabricating complex colloids.
To engineer geometrically diverse Janus and patchy colloids using CALP.

Main Methods:

Depositing emulsion particles into patterned microarrays within a fluidic cell.
Utilizing consecutive assembly and heterogeneous coassembly techniques.
Manipulating capillary immersion force, liquid particle hardness, and coalescence rate for lateral patterning.

Main Results:

Fabrication of eleven distinct colloid structures, including Janus squares and patchy particles.
Demonstration of bilayer and multi-material colloid assembly.
Engineered colloids exhibit fluorescence, resist flocculation, and are stable in organic solvents.

Conclusions:

CALP is a versatile microfabrication strategy for creating complex, arbitrarily shaped polymer colloids.
Heterogeneous CALP enables the synthesis of nonequilibrium particle structures not achievable with traditional wet chemistry.
These engineered colloids are promising for developing advanced nano/micromaterials and devices.