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. 2017 Dec 8;10(2):23. doi: 10.1007/s40820-017-0176-y

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 5 — Schematics of hydrothermal synthesis procedures of a individual 2D nanostructures and b 3D hierarchically assembled structures and their corresponding transmission electron microscopic images. Reproduced with permission from Ref. [84, 214]