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Article 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 (FeO) magnetic nanoparticles into eutectic gallium indium LM via reactive wetting mechanism. To address the intrinsic interfacial non-wettability between FeO and LM, a silver intermediate layer was introduced to fuse with indium component into AgIn intermetallic compounds, facilitating the anchoring of FeO 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10560245 | PMC |
| http://dx.doi.org/10.1038/s41467-023-41920-4 | DOI Listing |
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