Unraveling the effects of gas species and surface wettability on the morphology of interfacial nanobubbles

作者：Kadi Hu, Liang Luo, Xiaoming Sun, Hui Li · 发表于：Nanoscale Advances · 年份：2022 · DOI：10.1039/d2na00009a · 被引用次数：14 · 研究领域：Minerals Flotation and Separation Techniques、Metallurgical Processes and Thermodynamics、Characterization and Applications of Magnetic Nanoparticles

prefers to form a gas film (pancake) structure on the substrate. The CA of INBs demonstrates a linear relation with the strength of interfacial interaction; however, a limited bubble CA of ∼25° is found on superhydrophilic surfaces. The high gas density and high internal pressure of the INBs are further confirmed, accompanied by strong interfacial gas enrichment (IGE) behavior. The morphology study of differently sized INBs shows that the internal density of the gas is drastically decreased with the bubble size at the initial stage of bubble nucleation, while the CA remains almost constant. Based on the simulation results, a modified Young's equation is presented for describing the extraordinary morphology of INBs.