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. 2020 Aug 4;10(8):1526. doi: 10.3390/nano10081526

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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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TEM micrographs of (a) AuNPs, (b) Fe₃O₄ NPs and (c) Fe₃O₄@Au core-shell NPs (gold nanoflower grown on a magnetic core). In the lower part of the figure the circled portions in panels (a,b,c) are respectively reported in detail in panels (d,e,f). In panel (f) the magnetic core is highlighted with a red circle.