Universal Gas Adsorption Mechanism for Flat Nanobubble Morphologies
Nikolai D. Petsev, L. Gary Leal, M. Scott Shell
Abstract
The adsorption of gas molecules at the substrate beneath interfacial nanobubbles modifies the energy of the solid-gas interface, and therefore affects their morphology. In this work, we describe a simple thermodynamic model that captures the influence of gas adsorption and gives flat bubble shapes with reduced gas-side contact angles relative to the zero-adsorption case, in agreement with experimental studies. We show that this effect is general to both hydrophilic and hydrophobic substrates and has a stabilizing influence that extends nanobubble lifetimes.
Topics & Concepts
AdsorptionMaterials scienceChemical physicsWork (physics)MoleculeSurface energyBubbleGas bubbleSubstrate (aquarium)Solid surfaceContact angleNanotechnologyChemical engineeringThermodynamicsChemistryMechanicsPhysical chemistryComposite materialPhysicsOrganic chemistryOceanographyGeologyEngineeringMinerals Flotation and Separation Techniquesnanoparticles nucleation surface interactionsCharacterization and Applications of Magnetic Nanoparticles