Synthesis of stabilized myrrh-capped hydrocolloidal magnetite nanoparticles.

Ayman Atta,Sami Al-Hussain,Hamad Al-Lohedan

doi:10.3390/molecules190811263

Abstract

Herein we report a new method for synthesizing stabilized magnetic nanoparticle (MNP) colloids. A new class of monodisperse water-soluble magnetite nano-particles was prepared by a simple and inexpensive co-precipitation method. Iron ions and iodine were prepared by the reaction between ferric chloride and potassium iodide. The ferrous and ferric ions were hydrolyzed at low temperature at pH 9 in the presence of iodine to produce iron oxide nanoparticles. The natural product myrrh gum was used as capping agent to produce highly dispersed coated magnetite nanoparticles. The structure and morphology of the magnetic nanogel was characterized by Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM), and X-ray diffraction (XRD) was used to examine the crystal structure of the produced magnetite nanoparticles.

Highlights

Magnetite (Fe3O4) is a biocompatible mineral with very low toxicity, making it one of the best and most preferred stable materials for future applications in medicine [1]
Significant reduction of magnetization occurs at the surface of Fe3O4 nanoparticles, which affects many of their applications
The main advantage of the co-precipitation process is that a large amount of nanoparticles can be synthesized at the same time, but control of the particle size distribution is limited, because the growth of the crystals is only controlled by kinetic factors

Summary

Introduction

Magnetite (Fe3O4) is a biocompatible mineral with very low toxicity (nanocrystals of magnetite are magnetoreceptors in some animal brains), making it one of the best and most preferred stable materials for future applications in medicine [1]. Significant reduction of magnetization occurs at the surface of Fe3O4 nanoparticles, which affects many of their applications This obstacle can be overcome by capping the magnetic nanoparticles with various polymers [2,3] and organic acids, which in some cases allows restoration of the surface magnetism [4,5]. GA has been probed for coating iron oxide magnetic nanoparticles [9,10], gold nanoparticles [11], carbon nanotubes [12] and quantum dot nanocolloids [13] In all these cases, GA has been physically adsorbed via nonspecific interactions on the surface of the different nanostructures, either during their synthesis or adsorbed afterwards on as-produced structures

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