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Advances in Functional Magnetic Nanomaterials
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Advances in Functional Magnetic Nanomaterials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: 10 October 2024 | Viewed by 4525

Special Issue Editors

Dr. Maiyong Zhu

E-Mail Website
Guest Editor
School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China
Interests: carbon based materials; low-dimensional inorganic materials; metal organic frameworks; conducting polymers; energy conversion and storage; catalysis; environment treatment
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Agnishwar Girigoswami

E-Mail Website
Guest Editor
Chettinad Academy of Research and Education, Kelambakkam 603103, Tamil Nadu, India
Interests: biomedical nanotechnology; nanotheranostics

Special Issue Information

Dear Colleagues,

In recent decades, magnetic materials have received increasing attention due to their applications in specialized fields, including catalysis, biomedicine, environmental remediation, and energy conversion and storage. To date, numerous magnetic materials, including elementary nickel, cobalt, CoPt alloy, metal ferrite, etc., have been screened with many applications such as semiconductors and photovoltaics. For example, pristine magnetite has been demonstrated to have peroxidase activity, which can be used to promote the decomposition of H2O2, showing promising prospects in environmental treatment. In addition, the immobilization of noble nanoparticles or enzymes onto magnetic supports enables the ease of recovery of these catalytically active species, simplifying the catalytic process. Furthermore, coating a thin layer of functional materials on the surface of magnetic materials improves the acid resistance of magnetic materials and expands their application area, such as magnetic adsorbent, magnetic drug support, and so on. Significantly, a series of sensors for virus detection are achieved by surface modifying magnetic materials with biomolecules, such as antibodies, oligonucleotides, and aptamers, which are capable of selective binding with target viruses or their biomarkers in biological samples.

Despite these achievements in the area of magnetic materials, challenges still exist in both developing new magnetic materials and expanding their applications. Precise control of finite size, uniformity, and surface effects is of paramount significance in biomedical application to unveil the correlation between their structural features and properties of magnetic materials obtain desired application performance. Furthermore, the family of magnetic materials should be enlarged since current available magnetic materials are limited. In particular, multicomponent magnetic nanostructures are expected to be the next generation of advanced magnets to offer enhanced magnetic, optical, or catalytic properties. Additionally, more calculation models are urgently needed to reveal the support effect in catalysis application. Thanks to nonstop efforts from various research fields, it is out of the question that magnetic materials will bring us a prospective future in many fields.

Taking these goals in mind, this Special Issue will focus on new ideas in presenting recent progress in studies related to magnetic materials, covering a wide range of topics. Both original research and review articles are welcome for this Special Issue. Areas of interest include but are not limited to:

  • Synthesis of magnetic materials
  • Characterization techniques of magnetic materials
  • Calculation models for designing magnetic materials
  • Magnetic-material-based catalysts
  • Magnetic-material-based sensors
  • Magnetic solid-phase extraction of pollutants from water
  • Advanced bioimaging techniques based on magnetic materials
  • Magnetic material based drug carrier

Dr. Maiyong Zhu
Prof. Dr. Agnishwar Girigoswami
Guest Editors

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. Materials 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 2600 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

  • iron oxide
  • metal ferrite magnet
  • magnetic fluid
  • separation and purification of protein
  • magnetic drug delivery
  • magnetic resonance imaging
  • magnetic separation
  • magnetically recoverable catalyst
  • removal of pollutants
  • solid-phase microextraction

Published Papers (3 papers)

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Research

18 pages, 4641 KiB  
Article
Cetuximab-Conjugated Magnetic Poly(Lactic-co-Glycolic Acid) Nanoparticles for Dual-Targeted Delivery of Irinotecan in Glioma Treatment
by Banendu Sunder Dash, Yu-Jen Lu, Shu-Hui Luo and Jyh-Ping Chen
Materials 2023, 16(16), 5526; https://doi.org/10.3390/ma16165526 - 08 Aug 2023
Cited by 2 | Viewed by 1271
Abstract
A glioma is the most common malignant primary brain tumor in adults and is categorized according to its growth potential and aggressiveness. Within gliomas, grade 4 glioblastoma remains one of the most lethal malignant solid tumors, with a median survival time less than [...] Read more.
A glioma is the most common malignant primary brain tumor in adults and is categorized according to its growth potential and aggressiveness. Within gliomas, grade 4 glioblastoma remains one of the most lethal malignant solid tumors, with a median survival time less than 18 months. By encapsulating CPT-11 and oleic acid-coated magnetic nanoparticles (OMNPs) in poly(lactic-co-glycolic acid) (PLGA) nanoparticles, we first prepared PLGA@OMNP@CPT-11 nanoparticles in this study. After conjugating cetuximab (CET) with PLGA@OMNP@CPT-11, spherical PLGA@OMNP@CPT-11-CET nanoparticles with 250 nm diameter, 33% drug encapsulation efficiency, and 22% drug loading efficiency were prepared in a single emulsion/evaporation step. The nanoparticles were used for dual-targeted delivery of CPT-11 to U87 primary glioblastoma cells by actively targeting the overexpressed epidermal growth factor receptor on the surface of U87 cells, as well as by magnetic targeting. The physicochemical properties of nanoparticles were characterized in detail. CET-mediated targeting promotes intracellular uptake of nanoparticles by U87 cells, which can release four times more drug at pH 5 than at pH 7.4 to facilitate drug release in endosomes after intracellular uptake. The nanovehicle PLGA@OMNP-CET is cytocompatible and hemocompatible. After loading CPT-11, PLGA@OMNP@CPT-11-CET shows the highest cytotoxicity toward U87 compared with free CPT-11 and PLGA@OMNP@CPT-11 by providing the lowest drug concentration for half-maximal cell death (IC50) and the highest rate of cell apoptosis. In orthotopic brain tumor-bearing nude mice with U87 xenografts, intravenous injection of PLGA@OMNP@ CPT-11-CET followed by guidance with a magnetic field provided the best treatment efficacy with the lowest tumor-associated signal intensity from bioluminescence imaging. Full article
(This article belongs to the Special Issue Advances in Functional Magnetic Nanomaterials)
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13 pages, 2808 KiB  
Article
Environmentally Friendly Approach for Nd2Fe14B Magnetic Phase Extraction by Selective Chemical Leaching: A Proof-of-Concept Study
by Sina Khoshsima, Janja Vidmar, Zoran Samardžija, Tomaž Tomše, Monika Kušter, Amit Mishra, Sašo Šturm and Kristina Žužek
Materials 2023, 16(14), 5181; https://doi.org/10.3390/ma16145181 - 23 Jul 2023
Cited by 1 | Viewed by 1009
Abstract
The green transition initiative has exposed the importance of effective recycling of Nd-Fe-B magnets for achieving sustainability and foreign independence. In this study, we considered strip-cast, hydrogenated, jet-milled Nd-Fe-B powder as a case study to explore the potential for selective chemical leaching of [...] Read more.
The green transition initiative has exposed the importance of effective recycling of Nd-Fe-B magnets for achieving sustainability and foreign independence. In this study, we considered strip-cast, hydrogenated, jet-milled Nd-Fe-B powder as a case study to explore the potential for selective chemical leaching of the Nd-rich phase, aiming to extract the Nd2Fe14B matrix phase. Diluted citric and nitric acids at concentrations of 0.01, 0.1, and 1 M were considered potential leaching mediums, and the leaching time was 15 min. Microstructural investigation, magnetic characterization, and elemental compositional analysis were performed to investigate leaching efficiency and selectivity. Based on SEM analysis, Nd/Fe ratio monitoring via ICP-MS, and the high moment/mass value at 160 emu/g for the sample leached with 1 M citric acid, 1 M citric acid proved highly selective toward the Nd-rich phase. Exposure to nitric acid resulted in a structurally damaged Nd2Fe14B matrix phase and severely diminished moment/mass value at 96.2 emu/g, thus making the nitric acid unsuitable for selective leaching. The presence of hydrogen introduced into the material via the hydrogen decrepitation process did not notably influence the leaching dynamics. The proposed leaching process based on mild organic acids is environmentally friendly and can be scaled up and adopted for reprocessing industrial scrap or end-of-life Nd-Fe-B magnets to obtain single-phase Nd-Fe-B powders that can be used for novel magnet-making. Full article
(This article belongs to the Special Issue Advances in Functional Magnetic Nanomaterials)
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18 pages, 11048 KiB  
Article
Exploring the Piezoelectric Properties of Bismuth Ferrite Thin Films Using Piezoelectric Force Microscopy: A Case Study
by Denis Misiurev, Pavel Kaspar, Dinara Sobola, Nikola Papež, Saleh H. Fawaeer and Vladimír Holcman
Materials 2023, 16(8), 3203; https://doi.org/10.3390/ma16083203 - 18 Apr 2023
Cited by 2 | Viewed by 1617
Abstract
Over recent decades, the scientific community has managed to make great progress in the theoretical investigation and practical characterization of bismuth ferrite thin films. However, there is still much work to be completed in the field of magnetic property analysis. Under a normal [...] Read more.
Over recent decades, the scientific community has managed to make great progress in the theoretical investigation and practical characterization of bismuth ferrite thin films. However, there is still much work to be completed in the field of magnetic property analysis. Under a normal operational temperature, the ferroelectric properties of bismuth ferrite could overcome the magnetic properties due to the robustness of ferroelectric alignment. Therefore, investigation of the ferroelectric domain structure is crucial for functionality of any potential devices. This paper reports deposition and analyzation of bismuth ferrite thin films by Piezoresponse Force Microscopy (PFM) and XPS methods, aiming to provide a characterization of deposited thin films. In this paper, thin films of 100 nm thick bismuth ferrite material were prepared by pulsed laser deposition on multilayer substrates Pt/Ti(TiO2)/Si. Our main purpose for the PFM investigation in this paper is to determine which magnetic pattern will be observed on Pt/Ti/Si and Pt/TiO2/Si multilayer substrates under certain deposition parameters by utilizing the PLD method and using samples of a deposited thickness of 100 nm. It was also important to determine how strong the measured piezoelectric response will be, considering parameters mentioned previously. By establishing a clear understanding of how prepared thin films react on various biases, we have provided a foundation for future research involving the formation of piezoelectric grains, thickness-dependent domain wall formations, and the effect of the substrate topology on the magnetic properties of bismuth ferrite films. Full article
(This article belongs to the Special Issue Advances in Functional Magnetic Nanomaterials)
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