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. 2017 Mar 17;10(3):306. doi: 10.3390/ma10030306

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© 2017 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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Atomic Force microscopy (AFM) topographic images (3D view) for: (a) control (uncoated HDGS); and HDGS samples coated with one layer of: (b) U(600):3.45TEOS; (c) U(900):3.45TEOS; and (d) U(2000):3.45TEOS.