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利用液相透射电子显微镜技术研究纳米气泡在表面活性剂水溶液中的动力机制
Yuna Bae, Sungsu Kang, Byung Hyo Kim, Kitaek Lim, Sungho Jeon, Sangdeok Shim, Won Chul Lee, Jungwon Park
工程（英文） ›› 2021, Vol. 7 ›› Issue (5) : 630-635.
PDF(3046 KB)
PDF(3046 KB)
利用液相透射电子显微镜技术研究纳米气泡在表面活性剂水溶液中的动力机制
Nanobubble Dynamics in Aqueous Surfactant Solutions Studied by Liquid-Phase Transmission Electron Microscopy
纳米气泡因其超长的寿命和作为纳米级载体的潜力而在各种工业应用中受到广泛关注。纳米气泡的稳定性和理化性质对表面活性剂的存在高度敏感，表面活性剂可降低其表面张力或提高其静电稳定性。在本文中，我们报道了在存在可溶性表面活性剂的条件下纳米气泡动态行为的实时观察结果。利用多室石墨烯液体池液相透射电子显微镜（TEM），在相同的成像条件下观察了体相纳米气泡和表面纳米气泡。对纳米气泡的直接观察结果表明，稳定的气体传输在没有界面融合的情况下经常发生，而在相互作用的含表面活性剂的纳米气泡界面之间存在狭窄的距离。结果也阐明了纳米气泡的界面曲率是决定其界面稳定性的重要因素。
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.
纳米气泡 / 原位透射电镜 / 液相透射电镜 / 表面活性剂
Nanobubbles / In situ TEM / Liquid-phase TEM / Surfactant
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