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Here, we propose magnetic soft microfiberbots with high steerability, reliable maneuverability, and multimodal shape reconfigurability to perform robotic embolization in submillimeter regions via a remote, untethered, and magnetically controllable manner. Magnetic soft microfiberbots were fabricated by thermal drawing magnetic soft composite into microfibers, followed by magnetizing and molding procedures to endow a helical magnetic polarity. By controlling magnetic fields, magnetic soft microfiberbots exhibit reversible elongated\/aggregated shape morphing and helical propulsion in flow conditions, allowing for controllable navigation through complex vasculature and robotic embolization in submillimeter regions. We performed in vitro embolization of aneurysm and tumor in neurovascular phantoms and in vivo embolization of a rabbit femoral artery model under real-time fluoroscopy. These studies demonstrate the potential clinical value of our work, paving the way for a robotic embolization scheme in robotic settings.<\/jats:p>","DOI":"10.1126\/scirobotics.adh2479","type":"journal-article","created":{"date-parts":[[2024,2,21]],"date-time":"2024-02-21T18:59:19Z","timestamp":1708541959000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":188,"title":["Magnetic soft microfiberbots for robotic embolization"],"prefix":"10.1126","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-7139-8519","authenticated-orcid":true,"given":"Xurui","family":"Liu","sequence":"first","affiliation":[{"name":"School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan 430074, China."},{"name":"Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, 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