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. 2020 Feb 10;11:823. doi: 10.1038/s41467-020-14481-z

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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 ADF-STEM images of PbI₂ flake suspended on graphene. b High-resolution image of PbI₂ crystal annotated in the dark blue box in a. Scale bar corresponds to 1 nm. c High-resolution image of graphene taken from the cyan box region indicated in a. d FFT of PbI₂ from the region indicated in b. c FFT of graphene from the region indicated in c. f ADF-STEM images of PbI₂ flake suspended on graphene. g High-resolution image of PbI₂ crystal indicated by the dark green box in f. Scale bar corresponds to 1 nm. h High-resolution image of graphene from the light green box in f. i FFT of PbI₂ from the region indicated in g. h FFT of graphene from the region indicated in f. k Atomic model of PbI₂ (1 H) on graphene in the armchair direction. l Multislice image simulations based on the atomic model in k. m FFT of PbI₂ from the region indicated by the purple box in l. n FFT of graphene from the region indicated by the pink box in l. o Atomic model of PbI₂ (1 H) on graphene in the armchair direction. p Multislice image simulations based on the atomic model in k. q FFT of PbI₂ from the region indicated by the orange box in p. r FFT of graphene from the region indicated by the yellow box in p. s Atomic models showing PbI₂ relative to graphene for s DFT-relaxed atomic model of PbI₂ on graphene, rotated every 5 degrees. t Energy profile of various orientation angles of the PbI₂ flake on graphene.