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. 2020 Jan 27;6:6. doi: 10.1038/s41378-019-0109-7

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© The Author(s) 2020

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 — a Microstructures designed on a digital microfluidic chip. b The interface formed between the microstructures and promoted single-cell formation. c The SEM results of the optimized microstructure arrays, arranged as wall arrays, for trapping single cells. d The corresponding results of trapping MDA-MB-231 cells under structures c after 24 h