Zhou Liangwei, Hu Kaiming, Zhang Wenming, Meng Guang, Yin Jie, Jiang Xuesong
School of Chemistry & Chemical Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China.
State Key Laboratory of Mechanical Systems and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Natl Sci Rev. 2020 Jul;7(7):1247-1257. doi: 10.1093/nsr/nwaa052. Epub 2020 Mar 28.
Regulating existing micro and nano wrinkle structures into desired configurations is urgently necessary yet remains challenging, especially modulating wrinkle direction and location on demand. In this work, we propose a novel light-controlled strategy for surface wrinkles, which can dynamically and precisely regulate all basic characteristics of wrinkles, including wavelength, amplitude, direction and location (, , and ), and arbitrarily tune wrinkle topographies in two dimensions (2D). By considering the bidirectional Poisson's effect and soft boundary conditions, a modified theoretical model depicting the relation between stress distributions and the basic characteristics was developed to reveal the mechanical mechanism of the regulation strategy. Furthermore, the resulting 2D ordered wrinkles can be used as a dynamic optical grating and a smart template to reversibly regulate the morphology of various functional materials. This study will pave the way for wrinkle regulation and guide fabrication technology for functional wrinkled surfaces.
将现有的微米和纳米皱纹结构调节成所需的构型迫在眉睫，但仍然具有挑战性，尤其是按需调节皱纹的方向和位置。在这项工作中，我们提出了一种新颖的表面皱纹光控策略，该策略可以动态、精确地调节皱纹的所有基本特征，包括波长、振幅、方向和位置（波长、振幅、方向和位置），并在二维（2D）中任意调整皱纹形貌。通过考虑双向泊松效应和软边界条件，建立了一个描述应力分布与基本特征之间关系的修正理论模型，以揭示调节策略的力学机制。此外，由此产生的二维有序皱纹可以用作动态光栅和智能模板，以可逆地调节各种功能材料的形态。这项研究将为皱纹调节铺平道路，并指导功能性皱纹表面的制造技术。
