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. 2021 Aug 11;11(8):2048. doi: 10.3390/nano11082048

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Characterization of round Co@Au nanoparticles (Co@Au NPs) and elliptical Co@Au (Co@Au NEs) nanoparticles. (a) TEM micrograph of spherical Co@Au NPs. Scale bar = 20 nm. (b) Representation of size distribution of Co@Au NPS. x-axis highlights the diameter; y-axis highlights the size frequency. The number of particles analyzed was 184. (c) TEM micrograph highlighting elliptical-shaped Co@Au NEs. Scale bar = 20 nm. (d) Representation of size distribution of Co@Au NEs. x-axis highlights the diameter; y-axis highlights the size frequency. The number of particles analyzed was 11. (e) XRD analysis highlighting 2θ peaks corresponding to crystal structures of Co@Au NPs. (f) Analysis of magnetic properties of Co@Au NPs. x-axis highlights temperature; y-axis highlights magnetization. (g) Analysis of magnetic properties of Co@Au NPs. x-axis highlights magnetic field strength; y-axis highlights magnetization.