Progress in Magnetic Nanoparticles: From Synthesis to Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Inorganic Materials and Metal-Organic Frameworks".

Deadline for manuscript submissions: 20 August 2026 | Viewed by 1347

Special Issue Editors


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Guest Editor
Institute of Inorganic Chemistry, Leibniz University Hannover, 30167 Hannover, Germany
Interests: magnetic nanoparticles; assemblies; functional materials; magnetic hyperthermia; magnetometry; magneto-optics

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Guest Editor
Institute of Applied Magnetism, Complutense University of Madrid, 28260 Las Rozas, Spain
Interests: magnetic materials; nanoparticles; magnetic hyperthermia and photothermia
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Institute of Nanoscience, Nanotechnology and Molecular Nanomaterials, University of Castilla-La Mancha, 45004 Toledo, Spain
Interests: magnetic materials; superconducting materials; cryogenics; magneto-optics

Special Issue Information

Dear Colleagues,

A particularly fascinating and dynamic field of research lies at the intersection of magnetism and materials at the nanoscale. Magnetic nanoparticles in all sizes and shapes, as well as their assembly into functional structures, have attracted significant attention in recent decades. Among many interesting features, we want to highlight their ability to heat when subjected to radiofrequency fields, the possibility of manipulating and guiding them using external magnetic fields, and the unconventional magnetic phenomena that arise when the size is decreased. A significant amount of research efforts are devoted to improving their synthesis and reproducibility, tailoring their properties, and creating assembled materials where magnetic properties are enhanced in various ways. From sensing to catalysis and in nanomedicine and environmental sciences, magnetic nanoparticles have a wide range of applicability in the leading research areas of today.

This Special Issue aims to gather an extensive compilation of cutting-edge research articles, short communications and reviews related to the development of magnetic nanoparticles, including robust and reproducible synthesis approaches, their assembly in complex structures and the collective properties thereof, chemical functionalization and characterization, theoretical modeling and computational studies and their multidisciplinary applications.

Dr. Irene Morales
Dr. Patricia De la Presa
Dr. Fernando Gálvez Alonso
Guest Editors

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Keywords

  • magnetic nanoparticles
  • assemblies
  • surface effects
  • exchange bias
  • dipolar interactions
  • magnetic anisotropy
  • collective properties
  • ferromagnetic
  • antiferromagnetic
  • novel applications

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Published Papers (1 paper)

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Research

14 pages, 4807 KB  
Article
Insights into Growing Silica Around Monocrystalline Magnetite Nanorods Leading to Colloids with Improved Magnetic Properties—Obstacles and Solutions
by Nele Johanna Künnecke, Irene Morales, Madeleine Alexandra Schaefer and Sebastian Polarz
Nanomaterials 2026, 16(3), 219; https://doi.org/10.3390/nano16030219 - 6 Feb 2026
Viewed by 639
Abstract
Nanoparticles of ferrimagnetic magnetite (Fe3O4) are cornerstones of modern nanoscience and technology, primarily due to their superparamagnetic behavior. Beyond traditional applications in magnetorheology and magnetic hyperthermia, these materials are increasingly vital in fields like active matter, where precise surface [...] Read more.
Nanoparticles of ferrimagnetic magnetite (Fe3O4) are cornerstones of modern nanoscience and technology, primarily due to their superparamagnetic behavior. Beyond traditional applications in magnetorheology and magnetic hyperthermia, these materials are increasingly vital in fields like active matter, where precise surface fine-tuning is crucial. While coating isotropic, quasi-spherical magnetite nanoparticles with silica is a well-established and versatile route towards functionalization, transferring this achievement to nanorod systems remains a significant challenge. Successful coating of these high-aspect-ratio geometries would allow to exploit the direction-dependent properties and increased magnetic anisotropies. However, current literature largely focuses on polycrystalline rods composed of small, clustered subunits, which limits their magnetic potential. This work describes a breakthrough in the homogeneous silica coating and stabilization of monocrystalline magnetite nanorods. We demonstrate that the superior magnetic properties of these “naked” monocrystalline rods induce strong dipole-dipole interactions, which trigger aggregation and typically prevent the isolation of individual and homogeneously coated core-shell nanoparticles. By investigating the specific mechanisms of this aggregation, we established a robust coating procedure that yields the desired isolated particles. Critically, we show that the magnetite nanorods retain their monocrystalline integrity within the silica shell, thereby preserving the enhanced magnetic properties of the original nanocrystals. Full article
(This article belongs to the Special Issue Progress in Magnetic Nanoparticles: From Synthesis to Applications)
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