School of Mechanical and Aerospace Engineering and Division of WCU Multiscale Mechanical Design, Seoul National University, Seoul 151-742, South Korea.
Langmuir. 2012 Feb 21;28(7):3576-82. doi: 10.1021/la203799h. Epub 2012 Feb 9.
Anisotropic wrinkling which utilizes the anisotropic nature of liquid crystalline polymer (LCP) is demonstrated as a means of physical self-assembly to produce periodic microstructures. Through the plasma treatment on the molecularly aligned LCP film surface, one-dimensionally ordered wrinkle pattern was spontaneously formed on glass substrates without employing external thin-film deposition or prestrain control of the system. Experimental results indicate that the directionality of the wrinkle pattern can be tailored by the structural ordering of LCP molecules in the bilayer system of a hard skin layer on a soft substrate. Studies on process variables, such as the plasma treatment time and the film thickness, were conducted to figure out the effect on the wrinkling morphology. Due to its spatial periodicity over a large area and undemanding requirement of the process, this approach can be a candidate for the microfabrication in various applications.
各向异性褶皱利用了液晶聚合物 (LCP) 的各向异性特性，作为一种物理自组装手段来产生周期性的微结构。通过对分子取向的 LCP 薄膜表面进行等离子体处理，在不采用外部薄膜沉积或系统预拉伸控制的情况下，在玻璃基底上自发形成了一维有序的褶皱图案。实验结果表明，褶皱图案的方向性可以通过软基底上硬皮层的双层体系中 LCP 分子的结构有序性来调整。研究了等离子体处理时间和薄膜厚度等工艺变量对褶皱形态的影响。由于其在大面积上具有空间周期性，且对工艺要求不高，因此该方法可以成为各种应用中的微制造候选方法。
