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. 2018 Feb 12;8:2795. doi: 10.1038/s41598-018-21126-1

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© The Author(s) 2018

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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General scheme of the experimental setup. Two peristaltic pumps are used to pump ferroin and sucrose solution from their corresponding reservoirs. The mixture of both fluids occurs in a Y-shaped bifurcation and after that, the mixture enters the PDMS geometry that is illuminated with a LED. There, the flow is registered by a CCD camera. Finally, the mixture exits to a third reservoir. [1] CCD Camera, [2] PDMS Geometry, [3] LED, [4] Reservoir (Sucrose Solution), [5] Peristaltic Pumps, [6] Reservoir (Ferroin), [7] Reservoir (Ferroin + Sucrose Solution).