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. 2013 Mar 14;13(3):3635–3651. doi: 10.3390/s130303635

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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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Figure 6. — (a) Topographical contact mode AFM image of the graphene layer shown in Figure 3(e). (b) 2D, aerial view, of the same area. (c) Profile analysis of same, showing step heights of 1.97 and 0.74 nm, for arrow sets 1 and 2 respectively.