The spreading of a pure, volatile liquid on a wettable substrate has been studied in extensive detail. Here we show that the addition of a miscible, nonvolatile liquid can strongly alter the contact line dynamics and the final liquid deposition pattern. We observe two distinct regimes of behavior depending on the relative strength of solutal Marangoni forces and surface wetting. Fingerlike instabilities precede the deposition of a submicron thick film for large Marangoni forces and small solute contact angles, whereas isolated pearl-like drops emerge and are deposited in quasicrystalline patterns for small Marangoni forces and large solute contact angles. This behavior can be tuned by directly varying the contact angle of the solute liquid on the solid substrate.

中文翻译：

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调整挥发性液体混合物中的接触线动力学和沉积模式。

已对纯挥发性液体在可湿性基材上的扩散进行了广泛的研究。在这里，我们表明添加可混溶的非挥发性液体可以极大地改变接触线动力学和最终的液体沉积模式。我们观察到两种不同的行为方式，具体取决于溶出的马兰戈尼力和表面润湿性的相对强度。对于较大的Marangoni力和较小的溶质接触角，在沉积亚微米厚膜之前会出现手指状的不稳定性，而对于较小的Marangoni力和较大的溶质接触角，则出现类似珍珠状的液滴并以准晶形沉积。可通过直接改变溶质液体在固体基质上的接触角来调整此行为。