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. 2019 May 7;19(9):2103. doi: 10.3390/s19092103

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© 2019 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 (http://creativecommons.org/licenses/by/4.0/).

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TEM-derived Ag nanoparticle (NP) size distribution and TEM image of Ag NPs (inset) (a); UV/Vis absorption spectra of clear yellow colloidal Ag (Ag NPs), optical path length of 1.0 cm, blank—deionized water (b).