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. 2015 Sep 15;8(1):44–53. doi: 10.1007/s40820-015-0060-6

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© The Author(s) 2015

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. 7 — Comparison of NP penetration as a function of size of the NPs. a, b GNP penetration as a function of size and tissue thickness in MCF-7 and MDA-MB-231 cells, respectively. c, d Penetration of GNPs as a function of tissue depth for 20 and 50 nm GNPs, respectively. e Schematic outlining the various ‘depths’ in MLC tissue structures