On the Validation of Partial Wetting Model at Si Microstructured Surface

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  • YU Yankun
    Graduate School of Engineering, Kyushu Institute of Technology
  • ZHANG Dejian
    Department of Mechanical Engineering, Qilu University of Technology
  • NAGAYAMA Gyoko
    Department of Mechanical Engineering, Kyushu Institute of Technology

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Other Title
  • シリコンマイクロ構造面における部分濡れモデルの適用範囲について

Abstract

<p>The partial wetting at nano/microstructured surfaces can be described using the intermediate wetting state between the Cassie-Baxter and Wenzel state. However, the limitation of partial wetting model is still unclear. In this study, surface free energy analysis at the microstructured Si-water interface was performed from both theoretical and experimental aspects to verify the partial wetting model. The effective wetting area was estimated by electrochemical impedance spectroscopy method for the further analysis of the surface free energy experimentally. The partial wetting model was verified at the fabricated microstructured surfaces with its geometrical parameters smaller than 400 μm.</p>

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