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Magnetochemistry
Special Issues
Magnetite Nanomaterials
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Magnetite Nanomaterials

A special issue of Magnetochemistry (ISSN 2312-7481).

Deadline for manuscript submissions: closed (31 May 2018) | Viewed by 8624

Special Issue Editor

Dr. Gurvinder Singh

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Norwegian University of Science and Technology, Trondheim, Norway
Interests: shape and size-controlled nanomaterials synthesis; surface science; self-assembly; magnetic properties; magnetic resonance imaging; magnetic hyperthermia; catalysts; renewable energy

Special Issue Information

Dear Colleagues,

Magnetite nanoparticles have attracted particular attention because of their new properties, originated from size, shape, structure, and composition, but also their applications in a range of multidisciplinary areas, including biomedical, energy, environment and nanoelectronics. The most intriguing aspect of magnetic nanoparticles is that their magnetic properties can be tailored for use in intended application. For instance, magnetic nanoparticles of high magnetic saturation are required as a contrast agent in magnetic resonance imaging (MRI), cell sorting, bioseparation and environmental applications. For use in magnetic hyperthermia, storage media, and energy applications, magnetic nanoparticles should possess high magnetic saturaturation and, in particular, high magnetic anisotropy/coercivity, which can be achieved in nanoscale building blocks by tailoring the shape and structure (alloy or core-shell). Recently, it has been shown that the magnetic properties of nanoparticles can also be tailored by assembly nanoscale building blocks under external stimuli into the magnetic superstructure. Such self-assembled superstructures, that consist of a few hundred individual nanoparticles configured in an ordered lattice, show superior properties than to their individual counterpart because of strong dipolar-dipolar coupling between the nanoparticles. The influence of external field or combination of stimuli-response allows the formation of magnetic superstructures in different sizes and morphologies, thus offering another way to tune their properties. The potential self-assembled materials are yet to realize but can find diverse applications in magnetic storage media, energy storage devices, magnetic hyperthermia and sensing devices.

This Special Issue is aimed to highlight the most recent advances in the development of magnetite nanomaterials including composite systems at the different length scale and their applications from biomedical to the environment. Here, we invite authors to contribute in research articles and reviews on the potential topics, but are not limited to:

  • Size- and shape-controlled synthesis magnetite nanoparticles and their magnetic properties
  • Self-assembly of magnetic nanoparticles with or without external stimuli
  • Multifunctional Magnetic nanoparticles for MRI, magnetic hyperthermia and drug delivery
  • Magnetic nanoparticles for energy and environmental applications
  • Catalytic magnetic nanoparticles

Dr. Gurvinder Singh
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Magnetic nanoparticles synthesis
  • Exchange-coupled core-shell structures
  • Anisotropic magnetic nanostructures
  • Self-assembly of magnetic nanoparticles
  • Magnetic properties
  • Magnetic polymer nanocomposites
  • Biomolecular functionalization Magnetic hyperthermia
  • Contrast agents
  • Catalysis Environment
  • Energy and data Storage devices

Published Papers (2 papers)

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Research

16 pages, 3383 KiB  
Article
Unraveling Nanoscale Magnetic Ordering in Fe3O4 Nanoparticle Assemblies via X-rays
by Karine Chesnel, Dalton Griner, Dallin Smith, Yanping Cai, Matea Trevino, Brittni Newbold, Tianhan Wang, Tianmin Liu, Emmanuelle Jal, Alex H. Reid and Roger G. Harrison
Magnetochemistry 2018, 4(4), 42; https://doi.org/10.3390/magnetochemistry4040042 - 20 Sep 2018
Cited by 12 | Viewed by 4021
Abstract
Understanding the correlations between magnetic nanoparticles is important for nanotechnologies, such as high-density magnetic recording and biomedical applications, where functionalized magnetic particles are used as contrast agents and for drug delivery. The ability to control the magnetic state of individual particles depends on [...] Read more.
Understanding the correlations between magnetic nanoparticles is important for nanotechnologies, such as high-density magnetic recording and biomedical applications, where functionalized magnetic particles are used as contrast agents and for drug delivery. The ability to control the magnetic state of individual particles depends on the good knowledge of the magnetic correlations between particles when assembled. Inaccessible via standard magnetometry techniques, nanoscale magnetic ordering in self-assemblies of Fe3O4 nanoparticles is here unveiled via X-ray resonant magnetic scattering (XRMS). Measured throughout the magnetization process, the XRMS signal reveals size-dependent inter-particle magnetic correlations. Smaller (5 nm) particles show little magnetic correlations, even when packed close together, yielding to magnetic disorder in the absence of an external field, i.e., superparamagnetism. In contrast, larger (11 nm) particles tend to be more strongly correlated, yielding a mix of magnetic orders including ferromagnetic and anti-ferromagnetic orders. These magnetic correlations are present even when the particles are sparsely distributed. Full article
(This article belongs to the Special Issue Magnetite Nanomaterials)
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9 pages, 1862 KiB  
Communication
Magnetite–Corrole Hybrid Nanoparticles
by Rute A. Pereira, Tito Trindade and Joana F. B. Barata
Magnetochemistry 2018, 4(3), 37; https://doi.org/10.3390/magnetochemistry4030037 - 22 Aug 2018
Cited by 1 | Viewed by 4172
Abstract
This study describes the first example of a hybrid material comprising corrole- and silica-coated magnetite nanoparticles. Firstly, cuboid and spheroid magnetite nanoparticles were prepared using a simple hydrothermal route, followed by a silica coating. The hybrid nanoparticles were obtained by promoting a covalent [...] Read more.
This study describes the first example of a hybrid material comprising corrole- and silica-coated magnetite nanoparticles. Firstly, cuboid and spheroid magnetite nanoparticles were prepared using a simple hydrothermal route, followed by a silica coating. The hybrid nanoparticles were obtained by promoting a covalent link between a gallium (III)(pyridine) complex of 5,10,15-tris(pentafluorophenyl)corrole (GaPFC) and the surface of magnetite–silica core/shell nanoparticles (Fe3O4@SiO2), shaped both as cuboids and spheroids. The hybrids were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectrophotometry (UV-Vis) and transmission electron microscopy (TEM). Preliminary studies on the capacity of singlet oxygen generation of the hybrid nanoparticles showed that these have lower efficiency values when compared to the pure corrole compound. Full article
(This article belongs to the Special Issue Magnetite Nanomaterials)
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