Fan Xuhao, Deng Chunsan, Gao Hui, Jiao Binzhang, Liu Yuncheng, Chen Fayu, Deng Leimin, Xiong Wei
Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
Optics Valley Laboratory, Wuhan, Hubei 430074, China.
Sci Adv. 2022 Aug 12;8(32):eabn9942. doi: 10.1126/sciadv.abn9942. Epub 2022 Aug 10.
Structural wrinkles in nature have been widely imitated to enhance the surface functionalities of objects, especially three-dimensional (3D) architectured wrinkles, holding promise for emerging applications in mechanical, electrical, and biological processes. However, the fabrication of user-defined 3D nanowrinkled architectures is a long-pending challenge. Here, we propose a bottom-up laser direct assembly strategy to fabricate multidimensional nanowrinkled architectures in a single-material one-step process. Through the introduction of laser-induced thermal transition into a 3D nanoprinting process for leading the point-by-point nanoscale wrinkling and the self-organization of wrinkle structures, we have demonstrated the program-controlled and on-demand fabrication of multidimensional nanowrinkled structures. Moreover, the precise control of wrinkle morphology with an optimal wavelength of 40 nanometers and the regulation of the dynamic transformation of wrinkled cellular microstructures via interfacial stress mismatch engineering have been achieved. This study provides a universal protocol for constructing nearly arbitrary nanowrinkled architectures and facilitates a new paradigm in nanostructure manufacturing.
自然界中的结构皱纹已被广泛模仿，以增强物体的表面功能，尤其是三维（3D）结构化皱纹，有望在机械、电气和生物过程等新兴应用中发挥作用。然而，定制3D纳米皱纹结构的制造是一个长期悬而未决的挑战。在此，我们提出一种自下而上的激光直接组装策略，以在单材料一步法中制造多维纳米皱纹结构。通过将激光诱导的热转变引入3D纳米打印过程，以引导逐点纳米级起皱和皱纹结构的自组织，我们展示了多维纳米皱纹结构的程序控制和按需制造。此外，还实现了以40纳米的最佳波长精确控制皱纹形态，以及通过界面应力失配工程调节皱纹细胞微结构的动态转变。这项研究为构建几乎任意的纳米皱纹结构提供了通用方案，并推动了纳米结构制造的新范式。
