When the Cassie–Baxter and Wenzel states coexist for a liquid droplet on a micropatterned surface, the Cassie-to-Wenzel transition takes place if the energy barrier is overcome. Although multiple metastable states coexist due to the micropattern, this paper presents a simple Cassie-to-Wenzel transition of a 2 µL water droplet on a particular micropillared surface: When the droplet is gently deposited above the surface, it equalizes to the Cassie state at zero gravity; however, it transitions to the Wenzel state at the terrestrial gravity, in which the gravitational potential energy overcomes the energy barrier between the Cassie and Wenzel states.

中文翻译：

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Cassie-to-Wenzel 过渡中重力对微图案表面的影响

当 Cassie-Baxter 和 Wenzel 状态共存于微图案表面上的液滴时，如果克服了能量障碍，就会发生 Cassie-to-Wenzel 转变。尽管由于微图案存在多种亚稳态共存，本文提出了 2 µL 水滴在特定微柱表面上的简单 Cassie-to-Wenzel 过渡：当水滴轻轻沉积在表面上方时，它在以下位置与 Cassie 状态相等零重力; 然而，它在地球引力下过渡到温泽尔态，其中重力势能克服了卡西态和温泽尔态之间的能垒。