光滑微图案化缺陷上的润湿
Wetting on smooth micropatterned defects
摘要：
我们开发了一个模型，预测光滑的微图案化缺陷引入的接触角滞后。用光滑函数对缺陷进行建模，并用切线解解释了接触角滞后现象。当微弯月面同时接触缺陷的两侧时，接触线发生脱钉。使用光刻胶和实验结果证实了该模型的缺陷。重要的一点是该模型是尺度无关的，即接触角滞后取决于函数的纵横比，而不是其绝对大小;这可能对自然表面缺陷有影响。
英文摘要：
We develop a model which predicts the contact angle hysteresis introduced by smooth micropatterned defects. The defects are modeled by a smooth function and the contact angle hysteresis is explained using a tangent line solution. When the liquid micro-meniscus touches both sides of the defect simultaneously, depinning of the contact line occurs. The defects are fabricated using a photoresist and experimental results confirm the model. An important point is that the model is scale-independent, i.e. the contact angle hysteresis is dependent on the aspect ratio of the function, not on its absolute size; this could have implications for natural surface defects.
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