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. 2017 Oct 12;12:565. doi: 10.1186/s11671-017-2332-1

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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. 2 — The X-ray attenuation intensity of the AuNS@PEG nanoparticles as a function of the Au concentration (a) and CT image of the AuNS@PEG nanoparticles under different concentrations (iodohydrin, 1000, 500, 250, 125, 62.5, 31.75, 15.625, and 7.8125 ppm, respectively) (b)