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. 2018 Oct 12;8(10):824. doi: 10.3390/nano8100824

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© 2018 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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Characterization of Copper oxide nanoparticles (CuONPs). (a) Transmission electron microscopy (TEM) micrographs show spherical CuONPs with the size of approximately 40 nm; (b) The size distribution of CuONPs was determined by ImageJ software; (c) The zeta potential of CuONPs is −28.1 mV.