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. 2017 Apr 7;7:45837. doi: 10.1038/srep45837

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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2D and 3D images of DNA by Atomic Force Microscopy (AFM) scanning of mica surface (5 × 5 μm, scale bar: 200 nm) prepared by the solution of thiolated probes (2D: a, 3D: c) and self assembled DNAs (2D: b, 3D: d). AFM image of a 2 × 2 μm (scale bar: 100 nm) window of AuNPs incubated with thiolated probes (e) and self assembled DNAs (f), showing the dimensions difference between particles. Aggregated and dispersed states of AuNPs in blank (g) and test sample (h) after addition of high salt (10 × 10 μm).