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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. 4 — (A) The stepwise temperature changing curve and corresponding infrared thermal images of the LM sheath-core microfiber with the applied voltage from 0 to 1.2 V. (B) Cyclic stability test of the joule heating performance of the microfiber by switching voltage between 0 and 0.8 V. (C) The enlarged image of the dashed area in (B) shows the temperature changes in one on-off cycle. (D) Infrared thermal images of the fiber embedded in an elastic fabric glove (applied voltage, 0.4 V) as the fingers bend. (E) Microscopic images of the electrothermochromic microfibers and photographs of the fibers embedded in a fabric by switching the voltage on and off. Photo credit: Lijing Zheng, Donghua University.