. 2021 Aug 18;13(8):1290. doi: 10.3390/pharmaceutics13081290
© 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/).
Figure 2.
TEM micrographs: (a) Op-AG-NE and (b) Blank NE.