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. 2016 Jan 8;14:1. doi: 10.1186/s12951-015-0156-7

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© Sulheim et al. 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. 7 — a–c FLIM images of PC3 cells incubated for 24 h with free NR668 (a), PBCA (b) and POCA NPs (c) before growing for additional 5 days. Each pixel is colored based on the average lifetime. Fluorescence lifetime distribution for PBCA (D) and POCA (E) NPs inside cells at 5, 24–48 and 144–168 h (6–7 days). Emission spectra from PC3 cells incubated with free NR688 (green) or PBCA (f) or POCA NPs (g) after 24 h (red), or the NPs prior to incubation (blue). n = 5, error bars give SD