Biomimetic multifunctional wrinkle surface

Many geometric patterns are seen in the natural world, including patterns that take form spontaneously by self-assembly. Among these, the wrinkle structure is very commonly seen on the surface of a leaf, on skin and brain. In this study, we tried to prepare various wrinkle structure using original 3D-streching method based on bioinspired surface buckling, additional mechanical factors in the outer layer of our cells play a large role in the formation and the morphogenetic process of our bodies and tissues. It found that surfaces with different properties, an ultra-water-repellent and high-adsorption area and an ultra-water-repellent area, can be generated on the basis of two different pattern structures by applying water-repellent coating to the wrinkle film. Moreover, we succeeded fabrication of film with highly adhesive superhydrophobic surface and SERS activity. The results of this study will not only contribute to resolving issues of conventional top-down lithography techniques but will also be applicable to environmental, water-saving, medical and many other fields.