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. 2017 Nov 10;8:1438. doi: 10.1038/s41467-017-01778-9

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© The Author(s) 2017

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. 3 — The orthogonal photoresponse of the dye-sensitized microswimmers. a The superimposed image of the sequential frames shows the migration of D5 and SQ2 sensitized microswimmers under blue (475 nm) and red (660 nm) light alternating illumination (Supplementary Movie 1). Inserts: the molecular structures of D5 and SQ2 dye. b The migration speed of D5 (blue curve) and SQ2 (red curve) sensitized microswimmers in a under the alternating light illumination