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. 2019 Jun 17;11(6):1053. doi: 10.3390/polym11061053

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© 2019 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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Cryo-TEM images of (a) PAA in water (depicting small aggregates), (b) PAA in water/ethanol (depicting diminished aggregation, the arrow marks the edge of holes in the supporting carbon film), (c) PAA/PAH in water (depicting larger-scale aggregates), and (d) PAA/PAH in water/ethanol (depicting a homogeneous solution). Scale bar = 100 nm.