Freestanding 3D Mesostructures, Functional Devices, and Shape-Programmable Systems Based on Mechanically Induced Assembly with Shape Memory Polymers

Xueju Wang, Xiaogang Guo, Jilong Ye, Ning Zheng, Punit Kohli, Dongwhi Choi, Yi Zhang, Zhaoqian Xie, Qihui Zhang, Haiwen Luan, Kewang Nan, Bong Hoon Kim, Yameng Xu, Xiwei Shan, Wubin Bai, Rujie Sun, Zizheng Wang, Hokyung Jang, Fan Zhang, Yinji MaZheng Xu, Xue Feng, Tao Xie, Yonggang Huang, Yihui Zhang*, John A. Rogers

*Corresponding author for this work

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Capabilities for controlled formation of sophisticated 3D micro/nanostructures in advanced materials have foundational implications across a broad range of fields. Recently developed methods use stress release in prestrained elastomeric substrates as a driving force for assembling 3D structures and functional microdevices from 2D precursors. A limitation of this approach is that releasing these structures from their substrate returns them to their original 2D layouts due to the elastic recovery of the constituent materials. Here, a concept in which shape memory polymers serve as a means to achieve freestanding 3D architectures from the same basic approach is introduced, with demonstrated ability to realize lateral dimensions, characteristic feature sizes, and thicknesses as small as ≈500, 10, and 5 µm simultaneously, and the potential to scale to much larger or smaller dimensions. Wireless electronic devices illustrate the capacity to integrate other materials and functional components into these 3D frameworks. Quantitative mechanics modeling and experimental measurements illustrate not only shape fixation but also capabilities that allow for structure recovery and shape programmability, as a form of 4D structural control. These ideas provide opportunities in fields ranging from micro-electromechanical systems and microrobotics, to smart intravascular stents, tissue scaffolds, and many others.

Original languageEnglish (US)
Article number1805615
JournalAdvanced Materials
Volume31
Issue number2
DOIs
StatePublished - Jan 11 2019

Keywords

  • 3D microstructures
  • 3D printing
  • 4D printing
  • guided assembly
  • shape memory polymers

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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    Wang, X., Guo, X., Ye, J., Zheng, N., Kohli, P., Choi, D., Zhang, Y., Xie, Z., Zhang, Q., Luan, H., Nan, K., Kim, B. H., Xu, Y., Shan, X., Bai, W., Sun, R., Wang, Z., Jang, H., Zhang, F., ... Rogers, J. A. (2019). Freestanding 3D Mesostructures, Functional Devices, and Shape-Programmable Systems Based on Mechanically Induced Assembly with Shape Memory Polymers. Advanced Materials, 31(2), [1805615]. https://doi.org/10.1002/adma.201805615