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Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

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Published on: September 9, 2022

Cantilevered-capillary force apparatus for measuring multiphase fluid interactions.

John M Frostad¹, Martha C Collins, L Gary Leal

¹Department of Chemical Engineering, University of California, Santa Barbara, California 93016-5080, United States. frostad@engineering.ucsb.edu

Langmuir : the ACS Journal of Surfaces and Colloids

|April 2, 2013

Summary

A novel instrument quantifies interactions between microscopic particles like emulsions and foams. It measures forces from 1 nN to 1 mN for particles 10 μm to 1 mm in size.

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Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

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Area of Science:

Colloid and surface science
Materials science
Biophysics

Background:

Understanding particle interactions is crucial in fields like food science, materials engineering, and pharmaceuticals.
Existing methods may lack the precision or range to study diverse particle systems.

Purpose of the Study:

To introduce a new instrument for precise measurement of inter-particle and particle-surface forces.
To demonstrate the instrument's versatility across various colloidal systems.

Main Methods:

Development of a novel instrument capable of applying and measuring forces.
Characterization of interfacial tension, droplet coalescence, and adhesion forces.
Utilizing particles ranging from 10 μm to 1 mm in diameter.

Main Results:

The instrument successfully measured interfacial tension and coalescence times for emulsion droplets.
Adhesion forces were quantified for giant multilamellar vesicles and model food emulsion particles.
The measurable force range spans from 1 nN to 1 mN.

Conclusions:

The new instrument provides a versatile platform for studying micro-scale particle interactions.
It offers precise force measurements critical for optimizing processes involving colloids, emulsions, and foams.