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. 2017 Feb 16;22(2):301. doi: 10.3390/molecules22020301

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© 2017 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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Scavenging capacity of the prepared ZnO samples on 1,1-Diphenyl-2-picrylhydrazyl (DPPH) (DPPH) free radicals and color changes of DPPH with different concentration of ZnO-NPs (inset).