Magnetic Oxide Nanoparticles/Composites

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Nanospecies".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 2002

Special Issue Editor

Innovation Center of the Faculty of Technology and Metallurgy in Belgrade Ltd, University of Belgrade Karnegijeva 4, 11 120 Belgrade, Serbia
Interests: metal oxides; nanotechnology; composite materials; ceramics; catalysts
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Special Issue Information

Dear Colleagues,

This Special Issue of the Magnetochemistry journal on “Magnetic Oxide Nanoparticles/Composites”  provides an important forum for the disclosure and discussion of original contributions covering technologies for synthesis, characterization, and application of various nanostructured magnetic materials, including but not limited to magnetic oxides, magnetic nanoparticles, thin films, and composite materials. The connections between chemical, structural, and microstructural properties of the materials and magnetic properties are encouraged. The journal welcomes theoretical research, simulation, and experimental studies within the scope, in the form of reviews, original research articles, communications, and letters.

Dr. Vesna Nikolic
Guest Editor

Manuscript Submission Information

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Keywords

  • nanomagnetism
  • magnetic nanoparticles
  • magnetic oxides
  • thin films
  • composites

Published Papers (1 paper)

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Research

15 pages, 10101 KiB  
Article
Green Synthesis of Unsaturated Fatty Acid Mediated Magnetite Nanoparticles and Their Structural and Magnetic Studies
by Amlan Kumar Das, Apoorva Fanan, Daoud Ali, Vijendra Singh Solanki, Brijesh Pare, Bader O. Almutairi, Neha Agrawal, Neera Yadav, Vikram Pareek and Virendra Kumar Yadav
Magnetochemistry 2022, 8(12), 174; https://doi.org/10.3390/magnetochemistry8120174 - 30 Nov 2022
Cited by 6 | Viewed by 1534
Abstract
The green, cost-effective and sustainable synthesis of nanomaterials has been a key concern of scientists and researchers. In this view, MNPs were prepared using a sapota plant leaf extract and the surface of the magnetite nanoparticles was engineered with unsaturated fatty acids. The [...] Read more.
The green, cost-effective and sustainable synthesis of nanomaterials has been a key concern of scientists and researchers. In this view, MNPs were prepared using a sapota plant leaf extract and the surface of the magnetite nanoparticles was engineered with unsaturated fatty acids. The first report on the effect of unsaturation on the size and magnetic properties of magnetite nanoparticles (MNPs), prepared by the co-precipitation method, has been studied by coating surfactants on MNPs based on their unsaturation from zero to three (lauric acid, oleic acid, linoleic acid, linolenic acid). The size effect and magnetic properties of MNPs coated with a surfactant have been studied in comparison with uncoated magnetite nanoparticles. After the surface modification of the magnetite particle, it is necessary to check whether the magnetic property has been restored or not. Therefore, the magnetic property was studied. The presence of a surfactant on the surface of MNPs was confirmed by Fourier-transform infrared spectroscopy (FTIR), which was later confirmed by scanning electron microscope (SEM) and thermogravimetric analysis (TGA). The atomic structure was studied by X-ray diffraction (XRD) and the size of uncoated and surfactant-coated MNPs was determined by transmission electron microscopy (TEM) and the Scherrer equation by following XRD data. The magnetization property was analyzed by a vibrating sample magnetometer (VSM) at 10, 100 and 300 K and both bared and surfactant-coated MNPs exhibited a superparamagnetic nature at room temperature. The saturation magnetization (Ms) study shows that MNPs coated with a surfactant have a lower saturation magnetization value in comparison to uncoated NPs, confirming surface layering. Because the magnetic fluid has been stabilized in the aqueous medium, the double-layer model is expected to prevail. Full article
(This article belongs to the Special Issue Magnetic Oxide Nanoparticles/Composites)
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