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Aligned Droplet Patterns by Dewetting of Polymer Bilayers
Macromolecules ( IF 5.1 ) Pub Date : 2018-07-05 00:00:00 , DOI: 10.1021/acs.macromol.8b00620
Ming Chiu 1 , Jared A. Wood 1 , Asaph Widmer-Cooper 1 , Chiara Neto 1
Affiliation  

Dewetting of polymer thin films has been extensively studied in the past two decades as an approach to produce patterned surfaces. Here we report a novel phenomenon where dewetted polymer droplets spontaneously align on a substrate, and the alignment extends over a large scale (millimeters). The patterns are formed by dewetting a bilayer system formed by poly(4-vinylpyridine) (P4VP) thin film (80 nm) on a polystyrene (PS) thin film (100 nm) prepared by spin-coating. We investigated the mechanism of the spontaneous droplet alignment and concluded that the final aligned pattern results from series of aligned defects on the P4VP, which are formed during spin-coating. We identified experimental parameters that control the appearance and the order of the resulting aligned droplets.

中文翻译:

通过聚合物双层去湿排列的液滴模式

在过去的二十年中,已经对聚合物薄膜的去湿进行了广泛的研究,作为产生图案化表面的一种方法。在这里,我们报告了一种新颖的现象,其中经过润湿处理的聚合物液滴自发地在基板上对齐,并且对齐范围扩大了(毫米)。通过将由聚(4-乙烯基吡啶)(P4VP)薄膜(80 nm)形成的双层体系去湿在旋涂制备的聚苯乙烯(PS)薄膜(100 nm)上形成双层图案,从而形成图案。我们研究了自发液滴对准的机制,并得出结论,最终对准的图案是由P4VP上一系列对准的缺陷产生的,这些缺陷在旋涂过程中形成。我们确定了控制外观和排列的液滴顺序的实验参数。
更新日期:2018-07-05
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