Nanobubbles have attracted considerable attention in various industrial applications due to their exceptionally long lifetime and their potential as carriers at the nanoscale.The stability and physiochemical propertie...Nanobubbles have attracted considerable attention in various industrial applications due to their exceptionally long lifetime and their potential as carriers at the nanoscale.The stability and physiochemical properties of nanobubbles are highly sensitive to the presence of surfactants that can lower their surface tension or improve their electrostatic stabilization.Herein,we report real-time observations of the dynamic behaviors of nanobubbles in the presence of soluble surfactants.Using liquid-phase transmission electron microscopy(TEM)with multi-chamber graphene liquid cells,bulk nanobubbles and surface nanobubbles were observed in the same imaging condition.Our direct observations of nanobubbles indicate that stable gas transport frequently occurs without interfaces merging,while a narrow distance is maintained between the interfaces of interacting surfactant-laden nanobubbles.Our results also elucidate that the interface curvature of nanobubbles is an important factor that determines their interfacial stability.展开更多
基金financial support from the National Research Foundation of Korea(NRF)grant funded by the Korean government(Ministry of Science and ICT,NRF-2017R1A5A1015365)Creative-Pioneering Researchers Program through Seoul National University(2020)+3 种基金the Interdisciplinary Research Initiatives Programs by College of Engineering and College of Medicine,Seoul National Universitythe POSCO Science Fellowship of POSCO TJ Park Foundationthe support from the NRF funded by the Ministry of Education(2019R1F1A1059099 and 2020R1F1A1065856)the support from the research fund of Hanyang University(HY-2018-N)。
文摘Nanobubbles have attracted considerable attention in various industrial applications due to their exceptionally long lifetime and their potential as carriers at the nanoscale.The stability and physiochemical properties of nanobubbles are highly sensitive to the presence of surfactants that can lower their surface tension or improve their electrostatic stabilization.Herein,we report real-time observations of the dynamic behaviors of nanobubbles in the presence of soluble surfactants.Using liquid-phase transmission electron microscopy(TEM)with multi-chamber graphene liquid cells,bulk nanobubbles and surface nanobubbles were observed in the same imaging condition.Our direct observations of nanobubbles indicate that stable gas transport frequently occurs without interfaces merging,while a narrow distance is maintained between the interfaces of interacting surfactant-laden nanobubbles.Our results also elucidate that the interface curvature of nanobubbles is an important factor that determines their interfacial stability.
