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. 2017 Jun 2;12:387. doi: 10.1186/s11671-017-2150-5

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© The Author(s). 2017

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. 6 — a A scheme illustrating the preparation process of graphene/PANI hybrid materials. b CV curves of graphene, PANI, GEOP-1, GEP-2, and GEP-3, at 1 mV s⁻¹ in 1 M H₂SO₄ in the potential range from −0.2 to 0.6 V. c Specific capacitance changes with different samples. Reprinted with permission from [44]. Copyright 2010 Royal Society of Chemistry