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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/).
(a–c) The AAO pore distributions corresponding to Figure 15a,c,d, respectively. Reprinted with permission from Ref. [86]. Copyright 2014, Microsystem Technologies.