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. 2013 Oct 25;6(11):4946–4966. doi: 10.3390/ma6114946

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© 2013 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 license (http://creativecommons.org/licenses/by/3.0/).

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GaAs surface images before (A) and after protein grafting for several chemical interfaces: unfunctionalized (B); 0% MHDA (C); 100% MHDA (D); 3% MHDA (E); and 10% MHDA (F).