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Trapping of Gas Bubbles in Water at a Finite Distance below a Water-Solid Interface

Esteso, V. ; Carretero-Palacios, S. ; Thiyam, P. LU ; Míguez, H. ; Parsons, D. F. ; Brevik, I. and Boström, M. (2019) In Langmuir 35(12). p.4218-4223
Abstract

Gas bubbles in a water-filled cavity move upward because of buoyancy. Near the roof, additional forces come into play, such as Lifshitz, double layer, and hydrodynamic forces. Below uncharged metallic surfaces, repulsive Lifshitz forces combined with buoyancy forces provide a way to trap micrometer-sized bubbles. We demonstrate how bubbles of this size can be stably trapped at experimentally accessible distances, the distances being tunable with the surface material. By contrast, large bubbles (≥100 μm) are usually pushed toward the roof by buoyancy forces and adhere to the surface. Gas bubbles with radii ranging from 1 to 10 μm can be trapped at equilibrium distances from 190 to 35 nm. As a model for rock, sand grains, and biosurfaces,... (More)

Gas bubbles in a water-filled cavity move upward because of buoyancy. Near the roof, additional forces come into play, such as Lifshitz, double layer, and hydrodynamic forces. Below uncharged metallic surfaces, repulsive Lifshitz forces combined with buoyancy forces provide a way to trap micrometer-sized bubbles. We demonstrate how bubbles of this size can be stably trapped at experimentally accessible distances, the distances being tunable with the surface material. By contrast, large bubbles (≥100 μm) are usually pushed toward the roof by buoyancy forces and adhere to the surface. Gas bubbles with radii ranging from 1 to 10 μm can be trapped at equilibrium distances from 190 to 35 nm. As a model for rock, sand grains, and biosurfaces, we consider dielectric materials such as silica and polystyrene, whereas aluminium, gold, and silver are the examples of metal surfaces. Finally, we demonstrate that the presence of surface charges further strengthens the trapping by inducing ion adsorption forces.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
35
issue
12
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:30821464
  • scopus:85063159589
ISSN
0743-7463
DOI
10.1021/acs.langmuir.8b04176
language
English
LU publication?
yes
id
520b3908-b7b4-4b03-8c97-8164c0b226cb
date added to LUP
2019-04-08 13:24:58
date last changed
2024-05-28 07:15:49
@article{520b3908-b7b4-4b03-8c97-8164c0b226cb,
  abstract     = {{<p>Gas bubbles in a water-filled cavity move upward because of buoyancy. Near the roof, additional forces come into play, such as Lifshitz, double layer, and hydrodynamic forces. Below uncharged metallic surfaces, repulsive Lifshitz forces combined with buoyancy forces provide a way to trap micrometer-sized bubbles. We demonstrate how bubbles of this size can be stably trapped at experimentally accessible distances, the distances being tunable with the surface material. By contrast, large bubbles (≥100 μm) are usually pushed toward the roof by buoyancy forces and adhere to the surface. Gas bubbles with radii ranging from 1 to 10 μm can be trapped at equilibrium distances from 190 to 35 nm. As a model for rock, sand grains, and biosurfaces, we consider dielectric materials such as silica and polystyrene, whereas aluminium, gold, and silver are the examples of metal surfaces. Finally, we demonstrate that the presence of surface charges further strengthens the trapping by inducing ion adsorption forces.</p>}},
  author       = {{Esteso, V. and Carretero-Palacios, S. and Thiyam, P. and Míguez, H. and Parsons, D. F. and Brevik, I. and Boström, M.}},
  issn         = {{0743-7463}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{12}},
  pages        = {{4218--4223}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Langmuir}},
  title        = {{Trapping of Gas Bubbles in Water at a Finite Distance below a Water-Solid Interface}},
  url          = {{http://dx.doi.org/10.1021/acs.langmuir.8b04176}},
  doi          = {{10.1021/acs.langmuir.8b04176}},
  volume       = {{35}},
  year         = {{2019}},
}