Abstract Molecular dynamics simulations were carried out to investigate the static and dynamic wetting behaviors of water droplets on surfaces with single and dual structures at the nanoscale. The effects of the surface characteristic energy, pillar height, and applied force on the dynamic wetting behavior were considered in this study. The dual structures were constructed by attaching small minor bump textures to the main pillar structures. The dynamic behaviors of water droplets could be classified into four different groups according to their dynamic shapes. The dynamic wetting behaviors were quantitatively evaluated according to the contact angle hysteresis and the ratio of water molecules penetrating into the gaps between pillars. As a result, the dual structures make the surface more hydrophobic in the dynamic state, as well as the static state, compared to the single structures.

中文翻译：

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纳米尺度双结构表面上水滴的动态润湿行为

摘要 进行分子动力学模拟以研究水滴在纳米级单双结构表面上的静态和动态润湿行为。本研究考虑了表面特征能、柱高度和施加的力对动态润湿行为的影响。双结构是通过将小的小凹凸纹理连接到主柱结构来构建的。根据水滴的动态形状，水滴的动态行为可以分为四类。根据接触角滞后和渗透到柱之间间隙的水分子的比率定量评估动态润湿行为。结果，双重结构使表面在动态状态下更加疏水，