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. 2018 Nov 2;9:4594. doi: 10.1038/s41467-018-07073-5

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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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Fig. 8 — Approach that enables the microfabrication of compliant rolling-contact architected materials (CRAMs). a Our system can be used to directly print CRAM lattices with already curled straps as long as b gaps and spacers exist in the design. Such lattices fail to function, however, when they are slightly c over-exposed or d under-exposed. Our system can also use scanning holographic optical tweezers to deform the flexure straps after they have been printed straight to fabricate e compliant rolling-contact joints (CRJs) and f CRAMs with stored strain energy so they can achieve their intended properties (scale bar in c and d 10 μm, e 20 μm, f 30 μm)