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. 2016 Jun 8;13:28. doi: 10.1186/s12989-016-0140-x

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© The Author(s). 2016

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Imaging of CNC using AFM height (a) and amplitude (b) modes, and SEM (c). The EDX spectrum is also shown (d), along with the calculated weight percentages (Wt%) and atomic percentages (At%). Silicon elemental contributions are ignored in the EDX analysis. Scale bars are 200 nm for a and b