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Reactive wetting enabled anchoring of non-wettable iron oxide in liquid metal for miniature soft robot

Author

Listed:
  • Yifeng Shen

    (Harbin Institute of Technology (Shenzhen))

  • Dongdong Jin

    (Harbin Institute of Technology (Shenzhen))

  • Mingming Fu

    (Harbin Institute of Technology (Shenzhen))

  • Sanhu Liu

    (Harbin Institute of Technology
    Harbin Institute of Technology)

  • Zhiwu Xu

    (Harbin Institute of Technology
    Harbin Institute of Technology)

  • Qinghua Cao

    (Shanghai University of Engineering Science)

  • Bo Wang

    (Shanghai University of Engineering Science)

  • Guoqiang Li

    (Harbin Institute of Technology (Shenzhen))

  • Wenjun Chen

    (Harbin Institute of Technology (Shenzhen))

  • Shaoqin Liu

    (Harbin Institute of Technology)

  • Xing Ma

    (Harbin Institute of Technology (Shenzhen)
    Harbin Institute of Technology
    Harbin Institute of Technology)

Abstract

Magnetic liquid metal (LM) soft robots attract considerable attentions because of distinctive immiscibility, deformability and maneuverability. However, conventional LM composites relying on alloying between LM and metallic magnetic powders suffer from diminished magnetism over time and potential safety risk upon leakage of metallic components. Herein, we report a strategy to composite inert and biocompatible iron oxide (Fe3O4) magnetic nanoparticles into eutectic gallium indium LM via reactive wetting mechanism. To address the intrinsic interfacial non-wettability between Fe3O4 and LM, a silver intermediate layer was introduced to fuse with indium component into AgxIny intermetallic compounds, facilitating the anchoring of Fe3O4 nanoparticles inside LM with improved magnetic stability. Subsequently, a miniature soft robot was constructed to perform various controllable deformation and locomotion behaviors under actuation of external magnetic field. Finally, practical feasibility of applying LM soft robot in an ex vivo porcine stomach was validated under in-situ monitoring by endoscope and X-ray imaging.

Suggested Citation

  • Yifeng Shen & Dongdong Jin & Mingming Fu & Sanhu Liu & Zhiwu Xu & Qinghua Cao & Bo Wang & Guoqiang Li & Wenjun Chen & Shaoqin Liu & Xing Ma, 2023. "Reactive wetting enabled anchoring of non-wettable iron oxide in liquid metal for miniature soft robot," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41920-4
    DOI: 10.1038/s41467-023-41920-4
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    References listed on IDEAS

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