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. 2021 Sep 27;11(10):2525. doi: 10.3390/nano11102525

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Characterization of S-CDs. (A) UV-Vis absorption spectrum. (B) PL spectrum at different λex. (C) Time-resolved PL. Reproduced from [169], with permission from Elsevier, 2014. a.u.: arbitrary units.