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. 2016 May 4;11:242. doi: 10.1186/s11671-016-1440-7

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© Jeong et al. 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — AFM images of the surfaces of Au electrodes and the gap between the electrodes. The surface of the Au electrodes (a, c, e) and the gap (b, d, f) between the electrodes (a, b the untreated; c, d treated with 0.05 μM of the target DNA; e, f treated with 1 μM of the target DNA)