A solid–liquid–vapor interface dominated by a three-phase contact line usually serves as an active area for interfacial reactions and provides a vital clue to surface behavior. Recently, direct imaging of the triphase interface of superwetting interfaces on the microscale/nanoscale has attracted broad scientific attention for both theoretical research and practical applications, and has gradually become an efficient and intuitive approach to explore the wetting behaviors of various multiphase interfaces. Here, recent progress on characterizing the solid–liquid–vapor triphase interface on the microscale/nanoscale with diverse types of imaging apparatus is summarized. Moreover, the accurate, visible, and quantitative information that can be obtained shows the real interfacial morphology of the wetting behaviors of multiphase interfaces. On the basis of fundamental research, technical innovations in imaging and complicated multiphase interfaces of the superwetting surface are also briefly presented.
The solid–liquid–vapor interface, dominated by a three-phase contact line, usually serves as an active area of interfacial reactions and provides vital insight into surface behaviors. Direct imaging of solid–liquid–vapor triphase interfaces at the micro-/nanoscale are efficient approaches for understanding wetting behaviors. Recent progress on characterization techniques of solid–liquid–vapor interface systems at the microscale/nanoscale is summarized.
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