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http://dx.doi.org/10.3795/KSME-B.2015.39.5.449

Interfacial Behavior of Water Droplet on Micro-Nano Structured Surfaces  

Kwak, Ho Jae (Dept. of Mechanical Engineering, POSTECH)
Yu, Dong In (Division of Advanced Nuclear Engineering, POSTECH)
Kim, Moo Hwan (Korea Institute of Nuclear Safety(KINS))
Park, Hyun Sun (Division of Advanced Nuclear Engineering, POSTECH)
Moriyama, Kiyofumi (Division of Advanced Nuclear Engineering, POSTECH)
Ahn, Ho Sun (Division of Mechanical System Engineering, Incheon Nat'l Univ.)
Kim, Dong Eok (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.5, 2015 , pp. 449-453 More about this Journal
Abstract
Recently, surfaces with micro and nano structures are the focus of various research and engineering fields to enhance wetting characteristics of the surfaces. Hydrophilic surfaces with hierarchical structures are generally characterized by the interfacial behavior of water droplets. In this study, the interfacial behavior of water droplets is experimentally investigated considering the scale of structures. Using the dry etching and conventional lithography method, quantitative hierarchical structured surfaces are developed. The behavior of the liquid-vapor interface on the test sections is visualized using an automatic goniometer and a high-speed camera. On the basis of the visualized data, the interfacial behavior of water droplets is intensively investigated according to surface geometrical characteristics.
Keywords
Wettability; Spreading; Droplet; Super-hydrophilic; Microstructure; Nanostructure;
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