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. 2017 Jun 12;7:3215. doi: 10.1038/s41598-017-03033-z

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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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(A) Representative photograph of Dx-rich phase droplets sitting on illite-covered glass slides surrounded by a PEG-rich continuous phase, collected to estimate contact angles for clay microparticles in the ATPS, and (B) calculated three-phase contact angles from multiple images for different Dx-rich droplets on surfaces that were coated with clay were listed (Error is standard deviation of contact angle measurements).