Investigating Interfacial Effects on Surface Nanobubbles without Pinning Using Molecular Dynamics Simulation
| Autor: | Tsu-Hsu Yen, Yi-Xian Chen, Yeng-Long Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
Materials science chemistry.chemical_element 02 engineering and technology 01 natural sciences Molecular dynamics Adsorption 0103 physical sciences Physics::Atomic and Molecular Clusters Electrochemistry General Materials Science Physics::Chemical Physics 010306 general physics Astrophysics::Galaxy Astrophysics Spectroscopy Physics::Biological Physics Aqueous solution Argon Surfaces and Interfaces Interaction energy Gas concentration 021001 nanoscience & nanotechnology Condensed Matter Physics Condensed Matter::Soft Condensed Matter Hydrophobic surfaces chemistry Chemical physics 0210 nano-technology |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 34(50) |
| ISSN: | 1520-5827 |
| Popis: | We investigated how the stability of aqueous argon surface nanobubbles on hydrophobic surfaces depends on gas adsorption, solid-gas interaction energy, and the bulk gas concentration using molecular dynamics simulation with the SPC/E water solvent. We observed stable surface nanobubbles without surface pinning sites for longer than 160 ns, contrary to previous findings using monoatomic Lennard-Jones solvent. In addition, the hydrophobicity of a substrate has an effect to reduce the requirement degree of oversaturation on water bulk. We found that the gas enrichment layer, gas adsorption monolayer on the hydrophobic substrate, and water hydrogen bonding near the interface are likely necessary conditions for nanobubble stability. We concluded that gas nanobubble stability does not necessarily require three-phase pinning sites. |
| Databáze: | OpenAIRE |
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