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Toward large-scale alignment of electrohydrodynamic patterning of thin polymer films

机译：朝着大规模排列聚合物薄膜的电流体动力学构图

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摘要

To pattern thin polymer films via electrohydrodynamic instabilities, we design and utilize two different kinds of mask patterns to guide pillars into alignment over regions much greater in extent than their natural domain sizes. First, narrow protruding ridges that intersect to form regular patterns on the mask trigger the growth of pillars beneath. Later, square and triangular packings of pillars develop in the regions enclosed by those ridges, preserving the registry from one domain to the next over a much larger area than within individual domains in unpatterned portions of the mask. Second, small square protrusions that are prealigned into a large regular array on the mask guide the formation of square packings of pillars in domains that conform to the mask, forming a large array of pillars. Novel structures involving a combination of linear ridges and pillars are also produced mainly due to the dynamic merging among preformed pillars. Finally, we find vertex symmetry of the mask pattern is necessary for generating and preserving ordered patterns on the polymer film.
机译：为了通过电流体动力学的不稳定性来对聚合物薄膜进行图案化，我们设计并利用了两种不同的掩模图案来引导柱在范围上远大于其自然畴尺寸的区域对齐。首先，相交以在掩模上形成规则图案的狭窄凸脊会触发下方柱子的生长。后来，柱子的正方形和三角形堆积在被这些山脊包围的区域中形成，从而在一个区域到另一个区域之间保留了比在掩模的未图案化部分中的单个区域更大的区域。第二，在掩模上预先对准成大的规则阵列的小方形突起引导在与掩模相符的区域中形成柱的方形堆积，从而形成大的柱阵列。主要由于预制柱之间的动态合并，还产生了包含线性脊和柱的组合的新颖结构。最后，我们发现掩模图案的顶点对称对于在聚合物膜上生成和保留有序的图案是必要的。

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