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. 2016 Nov 9;24(1):253–267. doi: 10.1007/s10570-016-1111-y

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© The Author(s) 2016

Open AccessThis 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. 5 — The capacitive coupling distribution between the tip and surface was generated by a 1D statistical analysis of images depicted in Fig. 4, for the unmodified, anionic and cationic cellulose films. Capacitance coupling was measured across a 10 µm² sample surface area. The peak at 5.9 AU indicates that the cationic cellulose has a higher capacitive coupling, dC/dz