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. 2018 Dec 19;13:408. doi: 10.1186/s11671-018-2820-y

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© The Author(s). 2018

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. 1 — a Absorption and b emission spectra of Ru-CD and PEI-Ada@Ru-CD in water (10 μM). c Luminescence colors of the solutions of PEI-Ada (left), Ru-CD (middle), and PEI-Ada@Ru-CD (right) under a 365 nm lamp