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. 2016 Sep 15;6:33178. doi: 10.1038/srep33178

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) Schematic representation of two single layers each composed of a pattern including A2 and AC5 inks. (b) CAD model of the 3D patterned object. Combination of AC5 inks in two layers resembled a “T” shape pattern in 3D. (c) 3D printed patterned hydrogel structure; scale bar, 2 mm.