National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China.
Adv Sci (Weinh). 2023 Apr;10(12):e2207210. doi: 10.1002/advs.202207210. Epub 2023 Feb 12.
Periodically patterned surfaces can cause special surface properties and are employed as functional building blocks in many devices, yet remaining challenges in fabrication. Advancements in fabricating structured polymer surfaces for obtaining periodic patterns are accomplished by adopting "top-down" strategies based on self-assembly or physico-chemical growth of atoms, molecules, or particles or "bottom-up" strategies ranging from traditional micromolding (embossing) or micro/nanoimprinting to novel laser-induced periodic surface structure, soft lithography, or direct laser interference patterning among others. Thus, technological advances directly promote higher resolution capabilities. Contrasted with the above techniques requiring highly sophisticated tools, surface instabilities taking advantage of the intrinsic properties of polymers induce surface wrinkling in order to fabricate periodically oriented wrinkled patterns. Such abundant and elaborate patterns are obtained as a result of self-organizing processes that are rather difficult if not impossible to fabricate through conventional patterning techniques. Focusing on oriented wrinkles, this review thoroughly describes the formation mechanisms and fabrication approaches for oriented wrinkles, as well as their fine-tuning in the wavelength, amplitude, and orientation control. Finally, the major applications in which oriented wrinkled interfaces are already in use or may be prospective in the near future are overviewed.
周期性图案表面可以产生特殊的表面性质，并且在许多设备中被用作功能构建块，但在制造方面仍然存在挑战。通过采用基于自组装或原子、分子或颗粒的物理化学生长的“自上而下”策略，或者从传统的微成型（压印）或微/纳米压印到新型激光诱导周期性表面结构、软光刻或直接激光干涉图案化等的“自下而上”策略，可以实现制造结构化聚合物表面以获得周期性图案的进步。因此，技术进步直接促进了更高的分辨率能力。与上述需要高度复杂工具的技术相比，利用聚合物固有特性的表面不稳定性会导致表面起皱，从而制造出周期性取向的褶皱图案。通过传统的图案化技术，如果不是不可能的话，这些自组织过程相当难以制造出如此丰富和精细的图案。本文主要关注取向褶皱，全面描述了取向褶皱的形成机制和制造方法，以及在波长、振幅和方向控制方面的精细调整。最后，综述了已经在使用或在不久的将来可能具有前景的取向褶皱界面的主要应用。
