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. 2020 May 13;11:2390. doi: 10.1038/s41467-020-16085-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 The atomic-resolution HAADF-STEM image taken from [001] zone axis. Scale bar, 2 nm. b, c FFT patterns corresponding to areas outlined by magenta and white solid squares in a, respectively. d, e Atomic-resolution EDS maps corresponding to areas outlined by magenta and white dashed squares in a, respectively. f The three-dimensional reconstruction of 40 at% Ni iso-concentration surfaces presenting the morphologies of the fine particles (with an average diameter of 4.14 ± 0.62 nm) and matrix, respectively. Scale bar, 10 nm. g One-dimensional concentration profile showing the element distributions from matrix to Ni-enriched particle. Error bars, SD.