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. 2020 Jan 24;11:478. doi: 10.1038/s41467-020-14400-2

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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. 2 — a Top view and b side view of the Au₅Cu₂@Au₄₇ shells in [Cu₇₂Au₅₂(SR)₅₅]⁺, and c the triangle formed by twinning edges and apex in the Au₄₇ shell; d Top view and e side view of the Au₇@Au₄₂ shells in Au₁₀₂(SR)₄₄ or Au₁₀₃S₂(SR)₄₁^16,17, and f the truncated triangle formed by twinning edges and apex in the Au₄₂ shell. Color labels: magenta/pink = Au, orange = Cu.