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. 2016 Jun 6;11:285. doi: 10.1186/s11671-016-1468-8

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© Yang 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.

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Fig. 7 — Photoacoustic (PA) images. a Au NR@SiO₂ nanoparticles contained 6.788 μg Au resuspended in 100 μL 1× PBS via peritumor injection. b 5 × 10⁶ NP-CIK cells resuspended in 100 μL 1× PBS via peritumor injection (which contain 6.788 μg Au). (Control) 1× PBS (100 μL) injection as control. (day 0: before injection; day 1~4: four time points after injection)