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. 2021 Aug 17;12:4998. doi: 10.1038/s41467-021-25318-8

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Photography of a silicon array capped with hydrogel to sense the path of a walking Cubaris. The motion blur records the Cubaris tail, one frame per second. b Recorded voltage curves from silicon strips while the Cubaris walks under light illumination of 1-sun intensity. Each colored curve corresponds to the silicon strip marked by a spot of the same color in a. Left electrodes of silicon strips are connected to the positive ends of a multi-channel voltmeter.