Rolling-Up Kirigami Thin Films for Scalable 3D Structures

The patent applies the self-service principle by designing the 2D thin film with pre-stress and specific geometric patterns (kirigami cuts) that enable the structure to automatically roll up into the desired 3D configuration without requiring external intervention or complex post-shaping operations. The pre-stress stored in the 2D film serves as the driving force for the self-rolling process, eliminating the need for additional energy input or manual manipulation during fabrication.

The patent implements preliminary action by pre-stressing the 2D thin film before the rolling-up process and designing the kirigami pattern in advance. The pre-stress is introduced during the fabrication of the 2D film, and the geometric pattern is pre-configured to guide the self-rolling process. This preliminary preparation ensures that when the release layer is removed, the film automatically transforms into the target 3D structure without requiring subsequent shaping operations.

The patent applies segmentation by dividing the 2D thin film into multiple segments through the kirigami cut pattern. These segments are connected through bridge regions that allow controlled deformation during the rolling-up process. The segmentation enables the film to transform into complex 3D structures with multiple features while maintaining a relatively simple 2D patterning process, as the segments can be independently designed and optimized.

The patent utilizes dimensionality change by transforming the 2D planar film into a 3D rolled-up structure. The kirigami pattern and pre-stress configuration enable the film to curl up in specific directions, creating three-dimensional features such as cylinders, cones, or other shaped structures. This dimensional transformation allows for enhanced functionalization capabilities and adaptability to various applications while simplifying the fabrication process compared to traditional 3D manufacturing methods.