Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA.
ACS Appl Mater Interfaces. 2011 Nov;3(11):4201-5. doi: 10.1021/am200836n. Epub 2011 Oct 12.
In this paper, we demonstrate that thin layers of polymer coatings can be used to self-assemble pillars into stable microstructures. Polymer coatings are deposited onto elastomeric pillars using solventless initiated chemical vapor deposition and capillary forces are used to collapse the coated pillars into microstructures. The location of pillar collapse can be controlled by patterning regions of hydrophilicity and hydrophobicity. Poly(hydroxyethyl methacrylate) and poly(methacrylic acid) coatings stabilize the self-assembled microstructures by providing an adhesive force through solvent bonding. These solvent bonds allow the response of the microstructures to be tuned by varying the thickness of the polymer coating and the solubility parameter of the solvent. The coating process described in this paper is substrate-independent and therefore can be applied to pillars composed of any material.
在本文中，我们证明了可以使用聚合物涂层的薄层将柱子自组装成稳定的微结构。使用无溶剂引发的化学气相沉积将聚合物涂层沉积在弹性体柱子上，然后利用毛细管力将涂覆的柱子坍塌成微结构。柱子坍塌的位置可以通过图案化亲水区和疏水区来控制。聚（甲基丙烯酸羟乙酯）和聚（甲基丙烯酸）涂层通过溶剂键合提供粘附力来稳定自组装的微结构。这些溶剂键允许通过改变聚合物涂层的厚度和溶剂的溶解度参数来调整微结构的响应。本文中描述的涂层过程是与基底无关的，因此可以应用于由任何材料组成的柱子。
