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Role of Capillary Fluctuations in Stabilizing Bulk Nanobubbles
Yao Wang1,2, Limin Zhou1,3,2, Chunlei Wang4
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 28, 2025
Summary
This study models bulk nanobubbles (BNBs), revealing thermal capillary wave intensity stabilizes them. The findings explain BNB characteristics and potential soft matter applications.
Area of Science:
- Physics
- Soft Matter Science
Background:
- The existence of bulk nanobubbles (BNBs) is debated due to experimental limitations and assumptions about bubble equilibrium.
- Spherical bubbles are widely considered unable to achieve stable equilibrium.
Purpose of the Study:
- To develop a model explaining bulk nanobubble stability.
- To investigate the influence of thermal capillary waves on BNB stability in various saturated environments.
Main Methods:
- Development of a computational model for BNB stability.
- Analysis of experimental observations and computational results.
Main Results:
- Identified thermal capillary wave intensity (N) as a key factor in BNB stability.
- Corroborated typical BNB size distributions (100-200 nm, R_stable = 107 nm, N = 10,000).
- Confirmed BNB stability in undersaturated conditions with minimal size fluctuations across saturation levels.
Conclusions:
- The proposed model provides a mechanism for understanding BNB stability.
- Results align with experimental observations, supporting BNB existence and characteristics.
- Enhanced potential for BNB applications in soft matter science.
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