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. 2020 May 31;10(6):1086. doi: 10.3390/nano10061086

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© 2020 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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SEM (left) and TEM (right) images of the basic ZnO structures synthesised by the microwave irradiation: (a,b) nanorods, (c,d) nanoneedles, (e,f) nanocandles, (g,h) nanodisks, (i,j) nanonuts, (k,l) microstars, (m,n) microUFOs, (o,p) microballs. HRTEM images and SAED patterns were inserted as upper and lower insets in TEM images, respectively. The HRTEM images were obtained at the centre of the triangles or the hexagons in the TEM images. Reprinted (adapted) with permission from [525]. Copyright © 2008, American Chemical Society. All rights reserved. In order to re-use permission must be obtained from the rightsholder.