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. 2021 Nov 1;11:21402. doi: 10.1038/s41598-021-00757-x

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Heterostrain-enabled dynamically tunable moiré superlattice in TBG. (a, b) Schematic illustration of dynamically tunable moiré superlattices in TBG on a flexible substrate before and after bending. (c) Optical microscope image of the TBG device with a 13.2° twist angle used in our study. Scale bar, 20 μm. (d) Calculated (red line) strain on PET surface and experimental (black squares) uniaxial strain in bottom graphene. Thickness of our PET substrate is 135 μm. Inset: photo showing the flexibility of our substrate with the TBG device on top.