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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).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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Fig. 5 — (A) Working mechanism of LM sheath-core microfiber-based self-powered sensor. (B) Comparison of the Young’s moduli and relative triboelectric polarities of common triboelectric materials. (C) Voltage signals generated by contacting LM microfiber with five different triboelectric materials at the motion frequency of 2 Hz. The length of the fiber is 4 cm. (D) Voltage signals under different frequencies generated by contacting the fiber with silk. (E) Voltage signals under different strain levels of the fiber at the motion frequency of 2 Hz. The length of the fiber is 1 cm. (F) Photos and corresponding voltage signals by bending the fiber sensor–embedded spandex glove worn on a prosthetic hand. (G) Photos and corresponding voltage signals of the fiber sensor adhered to a human wrist. Photo credit: Lijing Zheng, Donghua University.