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. 2016 Oct 10;6:34874. doi: 10.1038/srep34874

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Copyright © 2016, 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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(a(a*)) TEM, HRTEM image of Nk, TEM and HAADF-STEM image of: (b(b*)) 1^st iteration consisting of very thin Au shell and depicting 2 different contrast which proves the formation of core-shell nanoparticles along CTAB layer, (c(c*)) 3rd iteration showing nanoflower formation, (d(d*)) 5^th iterative Nk@A with thick Au shell around 6–7 nm (Inset representing the colour mapping of corresponding images), (c^†,d^†) Line scan analysis showing the distribution of Fe, Co and Au elements from a single nanoparticle.