Engineered Elastomer Substrates for Guided Assembly of Complex 3D Mesostructures by Spatially Nonuniform Compressive Buckling |
| |
| Authors: | Kewang Nan Haiwen Luan Zheng Yan Xin Ning Yiqi Wang Ao Wang Juntong Wang Mengdi Han Matthew Chang Kan Li Yutong Zhang Wen Huang Yeguang Xue Yonggang Huang Yihui Zhang John A. Rogers |
| |
| Affiliation: | 1. Department of Mechanical Science and Engineering, University of Illinois at Urbana‐Champaign, Urbana, IL, USA;2. Departments of Mechanical Engineering, Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA;3. Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana‐Champaign, Urbana, IL, USA;4. Department of Engineering Mechanics, Tsinghua University, Beijing, P. R. China;5. National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Peking University, Beijing, P. R. China;6. Department of Electrical and Computer Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana‐Champaign, Urbana, IL, USA;7. Departments of Civil and Environmental Engineering, Mechanical Engineering, Materials Science and Engineering, Northwestern University, Evanston, IL, USA;8. Center for Mechanics and Materials, AML, Department of Engineering Mechanics, Tsinghua University, Beijing, P. R. China;9. Department of Materials Science and Engineering, Chemistry, Mechanical Science and Engineering, Electrical and Computer Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana‐Champaign, Urbana, IL, USA |
| |
| Abstract: | Approaches capable of creating 3D mesostructures in advanced materials (device‐grade semiconductors, electroactive polymers, etc.) are of increasing interest in modern materials research. A versatile set of approaches exploits transformation of planar precursors into 3D architectures through the action of compressive forces associated with release of prestrain in a supporting elastomer substrate. Although a diverse set of 3D structures can be realized in nearly any class of material in this way, all previously reported demonstrations lack the ability to vary the degree of compression imparted to different regions of the 2D precursor, thus constraining the diversity of 3D geometries. This paper presents a set of ideas in materials and mechanics in which elastomeric substrates with engineered distributions of thickness yield desired strain distributions for targeted control over resultant 3D mesostructures geometries. This approach is compatible with a broad range of advanced functional materials from device‐grade semiconductors to commercially available thin films, over length scales from tens of micrometers to several millimeters. A wide range of 3D structures can be produced in this way, some of which have direct relevance to applications in tunable optics and stretchable electronics. |
| |
| Keywords: | 3D mesostructures compressive buckling soft elastomers strain engineering |
|
|
