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. 2016 Feb 23;6:21792. doi: 10.1038/srep21792

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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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The left side of the reaction front is the unreacted regime, composed of Fe₂O₃ nanoparticles and chemical fuels, while the right side shows the reacted region composed of Fe₃O₄ nanoparticles only. The inset images depict the nanoparticle species before (left, Fe₂O₃) and after (right, Fe₃O₄) the passage of the combustion wave.