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. 2019 Dec 16;9(12):1791. doi: 10.3390/nano9121791

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© 2019 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 (http://creativecommons.org/licenses/by/4.0/).

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Surface conjugation of magnetite nanoparticles with oleic acid: transmission electron microscopy (TEM) image for (a) bare Fe₃O₄, respectively (b) oleic acid conjugated Fe₃O₄; particle diameter distribution for (c) bare Fe₃O₄, respectively (d) oleic acid conjugated Fe₃O₄; (e) schematic representation of the capping principle; (f) Fourier transform infrared (FTIR) spectra of Fe₃O₄ (1) Fe₃O₄/oleic acid (2), respectively oleic acid (3); (g) thermogravimetric analysis (TGA) and differential thermogravimetric analysis (DTA) curves for oleic acid conjugated Fe₃O₄; adapted from [219].