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. 2017 Feb 18;9(3):30. doi: 10.1007/s40820-017-0133-9

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 1 — Schematic representation of the propulsion mechanism of the UV light-induced TiO₂–Au Janus micromotors in: a an aqueous dye solution, and b pure water. Tracklines of the micromotors in c an aqueous solution containing 10⁻⁵ g L⁻¹ MB, and d pure water (taken from Video S1), under 40 mW cm⁻² UV light irradiation over 1 s (scale bar 10 μm)