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. 2020 Aug 31;10(9):1723. doi: 10.3390/nano10091723

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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 images of nanofilms (RL/PVP = 4/4) after immersion solutions. (a) Deionized water; (b) 20% H₂SO₄; (c) 40% H₂SO₄; (d) 60% H₂SO₄; (e) 80% H₂SO₄; (f) 100% H₂SO. Immersion duration is one hour.

SEM images of nanofilms (RL/PVP = 4/4) after immersion solutions. (a) Deionized water; (b) 20% H₂SO₄; (c) 40% H₂SO₄; (d) 60% H₂SO₄; (e) 80% H₂SO₄; (f) 100% H₂SO. Immersion duration is one hour.