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Related Experiment Video

Updated: Jul 4, 2025

Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging

Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging

Published on: April 28, 2022

Visualization and Experimental Characterization of Wrapping Layer Using Planar Laser-Induced Fluorescence.

Haobo Xu¹, Joshua M Herzog¹, Yimin Zhou¹

¹Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48105, United States.

|January 26, 2024

Summary

This summary is machine-generated.

Lubricant depletion from oil-impregnated surfaces is caused by a silicone oil wrapping layer on water droplets. Mineral oil avoids this wrapping layer, offering a solution for lubricant retention in nanotextured surfaces.

Keywords:

lubricant-impregnated surfaces (LIS)oil-infused surfaces planar laser-induced fluorescence (PLIF)slippery liquid-infused porous surfaces (SLIPS)spreading coefficient wetting ridge wrapping layer

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Last Updated: Jul 4, 2025

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Single Molecule Fluorescence Microscopy on Planar Supported Bilayers

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Published on: October 31, 2015

Area of Science:

Surface Science
Fluid Dynamics
Materials Science

Background:

Nanotextured oil-impregnated surfaces exhibit ultralow droplet adhesion and high mobility.
Applications include enhanced condensation, reduced drag, and anti-biofouling, but lubricant depletion is a key industrial concern.

Purpose of the Study:

Investigate the source of lubricant depletion in oil-impregnated surfaces.
Visualize and quantify the oil layer (wrapping layer) surrounding droplets.
Identify strategies to mitigate lubricant loss.

Main Methods:

Planar laser-induced fluorescence (PLIF) to visualize and measure the oil wrapping layer thickness.
Experimental analysis of silicone oil and mineral oil behavior on nanotextured surfaces.
Scaling analysis balancing capillary and van der Waals forces.

Main Results:

Silicone oil forms a nonuniform wrapping layer on water droplets due to interfacial force imbalance.
The average thickness of the silicone oil wrapping layer is approximately 50 ± 10 nm.
Mineral oil does not form a wrapping layer on water droplets under similar conditions.

Conclusions:

The wrapping layer of silicone oil is a primary contributor to lubricant depletion.
Mineral oil's lack of wrapping layer formation presents a viable strategy to enhance lubricant retention.
Findings aid in understanding and quantifying lubricant depletion for improved condensation and water harvesting technologies.