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. 2021 May 28;7(22):eabg4041. doi: 10.1126/sciadv.abg4041

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Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — (A) Schematic setup and the main components for the coaxial wet-spinning process for producing LM sheath-core microfibers. (B) A single as-spun fiber with the length of 380 m was collected on a continuously winding collector. (C) Microscopic images of LM sheath-core microfiber and human hair. (D) Photo of the microfiber threaded into a needle. (E) SEM image of the external surface of the microfiber. (F) SEM image of a knotted microfiber. (G) An LED can be lit up through a 55-cm-long activated LM sheath-core microfiber at a voltage of 3 V. (H) The cross-sectional SEM and corresponding elemental mapping images of the microfiber. Photo credit: Lijing Zheng, Donghua University.