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Updated: Jul 1, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

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Designing Plastrons for Underwater Bubble Capture: From Model Microstructures to Stochastic Nanostructures.

William S Y Wong¹, Abhinav Naga^2,3, Tobias Armstrong⁴

¹Department of Applied Physics, School of Science, Aalto University, Espoo, FI-02150, Finland.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|July 2, 2024

Summary

Designing surfaces for chemical-free bubble capture is crucial. This study reveals that minimizing surface feature size enhances bubble rupture, while increasing gas fraction improves absorption, offering key design principles for plastron-induced bubble coalescence.

Keywords:

bubble absorption bubble coalescence bubble rupture super liquid repellent superhydrophobic

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Published on: April 4, 2017

Area of Science:

Surface science
Fluid dynamics
Materials science

Background:

Chemical defoamers and mechanical agitation are common methods for bubble and foam removal.
Developing energy-passive, chemical-free bubble capture surfaces is vital for industrial applications like mineral flotation, wastewater treatment, and electrolysis.
Super-liquid-repellent surfaces, termed plastrons, utilize textured topographies with gas domains to capture bubbles via coalescence.

Purpose of the Study:

To investigate the influence of topographical feature size and gas fraction on the dynamics of bubble capture by plastrons.
To elucidate the two-step mechanics of plastron-induced bubble coalescence: rupture and absorption.
To provide design principles for efficient underwater bubble capture surfaces.

Main Methods:

Investigated the effect of varying topographical feature sizes on bubble capture dynamics.
Analyzed the impact of different gas fractions on bubble absorption.
Examined bubble rupture initiation, location, and timing in relation to surface features.
Studied the role of the liquid-solid contact line in bubble absorption post-rupture.

Main Results:

Smaller topographical feature sizes were found to accelerate bubble rupture.
Larger gas fractions significantly improved the absorption of bubbles.
Bubble rupture initiates on solid domains, particularly near feature edges, but rupture time increases with higher solid fractions.
The liquid-solid contact line dynamics post-rupture influence absorption rate and equilibrium.

Conclusions:

Rational minimization of surface feature sizes is key for rapid bubble rupture.
Optimizing gas fraction enhances bubble absorption efficiency.
Understanding the interplay between feature size, gas fraction, and contact line dynamics is crucial for designing effective plastron surfaces for underwater bubble capture.