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. 2020 Sep 3;10(9):1749. doi: 10.3390/nano10091749

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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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Examples of the MEF substrate fabricated by deposition methods: (a) a zigzag nanorods MEF array, and (b) a vertical nanorods MEF array. Adapted with permission from references [22,106].