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Femtosecond laser programmed artificial musculoskeletal systems

Author

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  • Zhuo-Chen Ma

    (Jilin University
    Tsinghua University)

  • Yong-Lai Zhang

    (Jilin University)

  • Bing Han

    (Tsinghua University)

  • Xin-Yu Hu

    (Jilin University)

  • Chun-He Li

    (Jilin University)

  • Qi-Dai Chen

    (Jilin University)

  • Hong-Bo Sun

    (Jilin University
    Tsinghua University)

Abstract

Natural musculoskeletal systems have been widely recognized as an advanced robotic model for designing robust yet flexible microbots. However, the development of artificial musculoskeletal systems at micro-nanoscale currently remains a big challenge, since it requires precise assembly of two or more materials of distinct properties into complex 3D micro/nanostructures. In this study, we report femtosecond laser programmed artificial musculoskeletal systems for prototyping 3D microbots, using relatively stiff SU-8 as the skeleton and pH-responsive protein (bovine serum albumin, BSA) as the smart muscle. To realize the programmable integration of the two materials into a 3D configuration, a successive on-chip two-photon polymerization (TPP) strategy that enables structuring two photosensitive materials sequentially within a predesigned configuration was proposed. As a proof-of-concept, we demonstrate a pH-responsive spider microbot and a 3D smart micro-gripper that enables controllable grabbing and releasing. Our strategy provides a universal protocol for directly printing 3D microbots composed of multiple materials.

Suggested Citation

  • Zhuo-Chen Ma & Yong-Lai Zhang & Bing Han & Xin-Yu Hu & Chun-He Li & Qi-Dai Chen & Hong-Bo Sun, 2020. "Femtosecond laser programmed artificial musculoskeletal systems," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18117-0
    DOI: 10.1038/s41467-020-18117-0
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