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Nanomaterials
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Magnetic Nanostructures: Synthesis, Properties and Applications
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Magnetic Nanostructures: Synthesis, Properties and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 4717

Special Issue Editor

Dr. Manuel Pernia Leal

E-Mail Website
Guest Editor
Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain
Interests: nanomedicine; magnetic NPs; MRI; diagnosis; cancer therapy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials based on magnetic structures are attracting great interest due to their excellent properties and applications in multiple research areas such as catalysis, sensors, medicine, and biology, among others. Researchers have been developing, in the last few decades, new approaches to the synthesis of different shapes, morphology, compositions, and sizes of magnetic nanostructures in the pursuit of more potential materials with multiple functionalities to improve the current magnetic nanomaterials. One of the most important examples of these magnetic nanostructures is iron oxide nanoparticles. Their syntheses have been deeply investigated in terms of size and shape control, resulting in a diversity of colloidal magnetic NPs with different types of magnetism. Fortunately, the construction of magnetic nanostructures is still an important topic in research with the aim of discovering magnetic nanostructures that exhibit a combination of functionalities in one single entity or the exploitation of their properties in other research areas.

In this manner, in this Special Issue, we want to focus on the following aspects:

  • The synthesis of magnetic nanostructures based on inorganic NPs such as iron oxide and metal-doped iron oxide NPs, and organic nanostructures such as liposomes, micelles, and polymeric NPs.
  • The study of the properties of the newly developed nanomaterials.
  • The potential application of the synthesized magnetic nanostructures.

Dr. Manuel Pernia Leal
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. Nanomaterials is an international peer-reviewed open access semimonthly 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 2900 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 NPs
  • Colloidal synthesis
  • Functionalization
  • Magnetism
  • Magnetic hyperthermia
  • MRI contrast agent
  • Magnetic recyclable catalyst
  • Magnetic sensor
  • Nanomedicine

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Published Papers (3 papers)

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Research

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10 pages, 1511 KiB  
Article
Biologically Relevant Micellar Nanocarrier Systems for Drug Encapsulation and Functionalization of Metallic Nanoparticles
by Victoria Valdivia, Raúl Gimeno-Ferrero, Manuel Pernia Leal, Chiara Paggiaro, Ana María Fernández-Romero, María Luisa González-Rodríguez and Inmaculada Fernández
Nanomaterials 2022, 12(10), 1753; https://doi.org/10.3390/nano12101753 - 20 May 2022
Cited by 6 | Viewed by 2041
Abstract
The preparation of new and functional nanostructures has received more attention in the scientific community in the past decade due to their wide application versatility. Among these nanostructures, micelles appear to be one of the most interesting supramolecular organizations for biomedical applications because [...] Read more.
The preparation of new and functional nanostructures has received more attention in the scientific community in the past decade due to their wide application versatility. Among these nanostructures, micelles appear to be one of the most interesting supramolecular organizations for biomedical applications because of their ease of synthesis and reproducibility and their biocompatibility since they present an organization similar to the cell membrane. In this work, we developed micellar nanocarrier systems from surfactant molecules derived from oleic acid and tetraethylene glycol that were able to encapsulate and in vitro release the drug dexamethasone. In addition, the designed micelle precursors were able to functionalize metallic NPs, such as gold NPs and iron oxide NPs, resulting in monodispersed hybrid nanomaterials with high stability in aqueous media. Therefore, a new triazole-derived micelle precursor was developed as a versatile encapsulation system, opening the way for the preparation of new micellar nanocarrier platforms for drug delivery, magnetic resonance imaging, or computed tomography contrast agents for therapeutic and diagnostic applications. Full article
(This article belongs to the Special Issue Magnetic Nanostructures: Synthesis, Properties and Applications)
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18 pages, 6865 KiB  
Article
Iron-Nickel Alloy with Starfish-like Shape and Its Unique Magnetic Properties: Effect of Reaction Volume and Metal Concentration on the Synthesized Alloy
by Norhan Nady, Noha Salem, Marwa A. A. Mohamed and Sherif H. Kandil
Nanomaterials 2021, 11(11), 3034; https://doi.org/10.3390/nano11113034 - 12 Nov 2021
Cited by 6 | Viewed by 2647
Abstract
Iron-nickel alloy is an example of bimetallic nanostructures magnetic alloy, which receives intensive and significant attention in recent years due to its desirable superior ferromagnetic and mechanical characteristics. In this work, a unique starfish-like shape of an iron-nickel alloy with unique magnetic properties [...] Read more.
Iron-nickel alloy is an example of bimetallic nanostructures magnetic alloy, which receives intensive and significant attention in recent years due to its desirable superior ferromagnetic and mechanical characteristics. In this work, a unique starfish-like shape of an iron-nickel alloy with unique magnetic properties was presented using a simple, effective, high purity, and low-cost chemical reduction. There is no report on the synthesis of such novel shape without complex precursors and/or surfactants that increase production costs and introduce impurities, so far. The synthesis of five magnetic iron-nickel alloys with varying iron to nickel molar ratios (10–50% Fe) was undertaken by simultaneously reducing Fe(II) and Ni(II) solution using hydrazine hydrate as a reducing agent in strong alkaline media for 15 min at 95–98 °C. The effect of reaction volume and total metal concentration on the properties of the synthesized alloys was studied. Alloy morphology, chemical composition, crystal structure, thermal stability, and magnetic properties of synthesized iron-nickel alloys were characterized by means of SEM, TEM, EDX, XRD, DSC and VSM. ImageJ software was used to calculate the size of the synthesized alloys. A deviation from Vegard’s law was recorded for iron molar ration higher than 30%., in which superstructure phase of FeNi3 was formed and the presence of defects in it, as well as the dimensional effects of nanocrystals. The saturation magnetization (Ms), coercivity (Hc), retentivity (Mr), and squareness are strongly affected by the molar ratio of iron and nickel and reaction volume as well as the total metal concentration. Full article
(This article belongs to the Special Issue Magnetic Nanostructures: Synthesis, Properties and Applications)
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Review

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17 pages, 9125 KiB  
Review
Recent Progress in Research on Ferromagnetic Rhenium Disulfide
by Hongtao Ren and Gang Xiang
Nanomaterials 2022, 12(19), 3451; https://doi.org/10.3390/nano12193451 - 2 Oct 2022
Cited by 6 | Viewed by 2267
Abstract
Since long-range magnetic ordering was observed in pristine Cr2Ge2Te6 and monolayer CrCl3, two-dimensional (2D) magnetic materials have gradually become an emerging field of interest. However, it is challenging to induce and modulate magnetism in non-magnetic (NM) [...] Read more.
Since long-range magnetic ordering was observed in pristine Cr2Ge2Te6 and monolayer CrCl3, two-dimensional (2D) magnetic materials have gradually become an emerging field of interest. However, it is challenging to induce and modulate magnetism in non-magnetic (NM) materials such as rhenium disulfide (ReS2). Theoretical research shows that defects, doping, strain, particular phase, and domain engineering may facilitate the creation of magnetic ordering in the ReS2 system. These predictions have, to a large extent, stimulated experimental efforts in the field. Herein, we summarize the recent progress on ferromagnetism (FM) in ReS2. We compare the proposed methods to introduce and modulate magnetism in ReS2, some of which have made great experimental breakthroughs. Experimentally, only a few ReS2 materials exhibit room-temperature long-range ferromagnetic order. In addition, the superexchange interaction may cause weak ferromagnetic coupling between neighboring trimers. We also present a few potential research directions for the future, and we finally conclude that a deep and thorough understanding of the origin of FM with and without strain is very important for the development of basic research and practical applications. Full article
(This article belongs to the Special Issue Magnetic Nanostructures: Synthesis, Properties and Applications)
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