Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 116, Issue 48, Pages 23909-23914Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1915332116
Keywords
configurable elastic crack engineering; true 3D replication; hierarchical structures; biomimetic materials
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Funding
- National Natural Science Foundation of China [51773173]
- Hong Kong Baptist University [FRG2/17-18/102, SDF 03-17-096, RC-IRMS/16-17/03]
- Hong Kong Research Grants Council [C1018-17G, 22200515, 11218417]
- Hong Kong Baptist University (HKBU), State Key Laboratory of Environmental and Biological Analysis, State Key Laboratory - Collaborative Research Fund [SKLP_1718_P01]
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Three-dimensional hierarchical morphologies widely exist in natural and biomimetic materials, which impart preferential functions including liquid and mass transport, energy conversion, and signal transmission for various applications. While notable progress has been made in the design and manufacturing of various hierarchical materials, the state-of-the-art approaches suffer from limited materials selection, high costs, as well as low processing throughput. Herein, by harnessing the configurable elastic crack engineering- controlled formation and configuration of cracks in elastic materials-an effect normally avoided in various industrial processes, we report the development of a facile and powerful technique that enables the faithful transfer of arbitrary hierarchical structures with broad material compatibility and structural and functional integrity. Our work paves the way for the cost-effective, large-scale production of a variety of flexible, inexpensive, and transparent 3D hierarchical and biomimetic materials.
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