Department of Chemistry, Columbia University, 3000 Broadway, MC 3157, NY 10027, USA.
J Colloid Interface Sci. 2010 Nov 15;351(2):556-60. doi: 10.1016/j.jcis.2010.07.070. Epub 2010 Aug 2.
In this report we examine the dewetting of spin-cast poly (styrene) films in a confined geometry. We designed a platform for laterally confining PS by photo-patterning crosslinks in spin-coated thin films. Heating the patterned film above the glass transition temperature of PS results in localized dewetting patterns in regions that were not crosslinked, while the crosslinked pattern serves as a rigid barrier that confines the retraction of the uncrosslinked polymer in micron-sized domains. The barriers also provide a favorable surface that the liquid PS wets onto, forming a rim at the boundary of crosslinked and uncrosslinked polymer. The resulting patterns are shown to be dependent on the irradiation and annealing time, the dimensions of the uncrosslinked region and the thickness of the film.
在本报告中，我们研究了受限几何形状中旋涂聚（苯乙烯）薄膜的去湿过程。我们设计了一个平台，通过光图案化旋涂薄膜中的交联来限制 PS 的横向。将图案化的薄膜加热到 PS 的玻璃化转变温度以上，会导致未交联区域出现局部去湿图案，而交联图案则作为刚性屏障，限制未交联聚合物在微米级域中的回缩。这些屏障还提供了一个有利的表面，使液态 PS 能够润湿，在交联和未交联聚合物的边界形成一个边缘。结果表明，所得图案取决于辐照和退火时间、未交联区域的尺寸以及薄膜的厚度。
