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. 2016 Sep 2;7:12697. doi: 10.1038/ncomms12697

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) Scheme illustration for the formation of Sn quantum sheets confined in graphene, (b) TEM image, (c) HRTEM image, (d–f) AFM image, the corresponding height profile and scheme illustration and (g) micro-Raman spectrum of the Sn quantum sheets confined in graphene. (h) TG analysis of Sn quantum sheets confined in graphene, 15 nm Sn nanoparticles and 15 nm Sn nanoparticles mixed with graphene. The scale bars in (b–d) are 100, 10 and 200 nm, respectively. The inset circles in (c) denote the presence of Sn quantum sheets.