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Advanced Research in Magnetic Nanoparticles
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Advanced Research in Magnetic Nanoparticles

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Nanochemistry".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 6558

Special Issue Editor

Dr. Rainer Tietze

E-Mail Website
Guest Editor
Department of Otorhinolaryngology, Head & Neck Surgery, Section of Experimental Oncology & Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship, Universitätsklinikum Erlangen, Erlangen, Germany
Interests: magnetic nanoparticles; drug delivery; surface functionalization

Special Issue Information

Dear Colleagues,

Magnetic nanoparticles are a well-investigated but still very exciting topic for various research fields, be they biomedical or technical. Due to their unique intrinsic properties, this type of nanoparticles is suitable as a technology platform whose development goes hand in hand with the knowledge gained from corresponding research. Therefore, the topic is far from being completed. Instead, it is more productive and diverse than ever. The title of this Special Issue is "Advanced Research in Magnetic Nanoparticles" and provides the necessary openness and flexibility for new exciting studies that we hope to obtain with this initiative. Recently introduced materials such as carbon dots or air-stable iron particles and novel manufacturing processes such as mechanochemical syntheses are exciting, but the specifics of reactions that occur or are impaired on the surface of such particles are also important contributions. Complex application scenarios in the field of artificial intelligence are attractive, and new targeted concepts in the application area of infectious diseases are essential. The appeal for submissions to this Special Issue is brief: new materials, new syntheses, and new applications.

Dr. Rainer Tietze
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. Molecules 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 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.

Published Papers (4 papers)

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Research

19 pages, 5881 KiB  
Article
Comparing the Colloidal Stabilities of Commercial and Biogenic Iron Oxide Nanoparticles That Have Potential In Vitro/In Vivo Applications
by Jonas Schwan, Simon Markert, Sabine Rosenfeldt, Dirk Schüler, Frank Mickoleit and Anna S. Schenk
Molecules 2023, 28(13), 4895; https://doi.org/10.3390/molecules28134895 - 21 Jun 2023
Cited by 1 | Viewed by 1047
Abstract
For the potential in vitro/in vivo applications of magnetic iron oxide nanoparticles, their stability in different physiological fluids has to be ensured. This important prerequisite includes the preservation of the particles’ stability during the envisaged application and, consequently, their invariance with respect to [...] Read more.
For the potential in vitro/in vivo applications of magnetic iron oxide nanoparticles, their stability in different physiological fluids has to be ensured. This important prerequisite includes the preservation of the particles’ stability during the envisaged application and, consequently, their invariance with respect to the transfer from storage conditions to cell culture media or even bodily fluids. Here, we investigate the colloidal stabilities of commercial nanoparticles with different coatings as a model system for biogenic iron oxide nanoparticles (magnetosomes) isolated from magnetotactic bacteria. We demonstrate that the stability can be evaluated and quantified by determining the intensity-weighted average of the particle sizes (Z-value) obtained from dynamic light scattering experiments as a simple quality criterion, which can also be used as an indicator for protein corona formation. Full article
(This article belongs to the Special Issue Advanced Research in Magnetic Nanoparticles)
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10 pages, 2142 KiB  
Article
Unexpected Room Temperature Ferromagnetism of a Ball-Milled Graphene Oxide—Melamine Mixture
by Vladimir P. Vasiliev, Eugene N. Kabachkov, Alexander V. Kulikov, Roman A. Manzhos, Iurii G. Morozov and Yury M. Shulga
Molecules 2022, 27(22), 7698; https://doi.org/10.3390/molecules27227698 - 09 Nov 2022
Viewed by 1325
Abstract
Nitrogen-doped carbon nanomaterial (NDCNM) was synthesized by grinding a mixture of graphene oxide and melamine in a planetary mill with both balls and milling chamber of zirconium dioxide. In the electron spin resonance spectrum of NDCNM, a broad signal with g = 2.08 [...] Read more.
Nitrogen-doped carbon nanomaterial (NDCNM) was synthesized by grinding a mixture of graphene oxide and melamine in a planetary mill with both balls and milling chamber of zirconium dioxide. In the electron spin resonance spectrum of NDCNM, a broad signal with g = 2.08 was observed in addition to a narrow signal at g = 2.0034. In the study using a vibrating-sample magnetometer, the synthesized material is presumably a ferromagnet with a coercive force of 100 Oe. The specific magnetization at 10,000 Oe is approximately 0.020 and 0.055 emu/g at room temperature and liquid nitrogen temperature, respectively. Full article
(This article belongs to the Special Issue Advanced Research in Magnetic Nanoparticles)
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17 pages, 4918 KiB  
Article
Plasmid-DNA Delivery by Covalently Functionalized PEI-SPIONs as a Potential ‘Magnetofection’ Agent
by René Stein, Felix Pfister, Bernhard Friedrich, Pascal-Raphael Blersch, Harald Unterweger, Anton Arkhypov, Andriy Mokhir, Mikhail Kolot, Christoph Alexiou and Rainer Tietze
Molecules 2022, 27(21), 7416; https://doi.org/10.3390/molecules27217416 - 01 Nov 2022
Cited by 4 | Viewed by 1354
Abstract
Nanoformulations for delivering nucleotides into cells as vaccinations as well as treatment of various diseases have recently gained great attention. Applying such formulations for a local treatment strategy, e.g., for cancer therapy, is still a challenge, for which improved delivery concepts are needed. [...] Read more.
Nanoformulations for delivering nucleotides into cells as vaccinations as well as treatment of various diseases have recently gained great attention. Applying such formulations for a local treatment strategy, e.g., for cancer therapy, is still a challenge, for which improved delivery concepts are needed. Hence, this work focuses on the synthesis of superparamagnetic iron oxide nanoparticles (SPIONs) for a prospective “magnetofection” application. By functionalizing SPIONs with an active catechol ester (CafPFP), polyethyleneimine (PEI) was covalently bound to their surface while preserving the desired nanosized particle properties with a hydrodynamic size of 86 nm. When complexed with plasmid-DNA (pDNA) up to a weight ratio of 2.5% pDNA/Fe, no significant changes in particle properties were observed, while 95% of the added pDNA was strongly bound to the SPION surface. The transfection in A375-M cells for 48 h with low amounts (10 ng) of pDNA, which carried a green fluorescent protein (GFP) sequence, resulted in a transfection efficiency of 3.5%. This value was found to be almost 3× higher compared to Lipofectamine (1.2%) for such low pDNA amounts. The pDNA-SPION system did not show cytotoxic effects on cells for the tested particle concentrations and incubation times. Through the possibility of additional covalent functionalization of the SPION surface as well as the PEI layer, Caf-PEI-SPIONs might be a promising candidate as a magnetofection agent in future. Full article
(This article belongs to the Special Issue Advanced Research in Magnetic Nanoparticles)
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9 pages, 2041 KiB  
Article
The Adsorption Behavior of Gas Molecules on Co/N Co–Doped Graphene
by Tingyue Xie, Ping Wang, Cuifeng Tian, Guozheng Zhao, Jianfeng Jia, Chenxu Zhao and Haishun Wu
Molecules 2021, 26(24), 7700; https://doi.org/10.3390/molecules26247700 - 20 Dec 2021
Cited by 6 | Viewed by 2322
Abstract
Herein, we have used density functional theory (DFT) to investigate the adsorption behavior of gas molecules on Co/N3 co–doped graphene (Co/N3–gra). We have investigated the geometric stability, electric properties, and magnetic properties comprehensively upon the interaction between Co/N3–gra [...] Read more.
Herein, we have used density functional theory (DFT) to investigate the adsorption behavior of gas molecules on Co/N3 co–doped graphene (Co/N3–gra). We have investigated the geometric stability, electric properties, and magnetic properties comprehensively upon the interaction between Co/N3–gra and gas molecules. The binding energy of Co is −5.13 eV, which is big enough for application in gas adsorption. For the adsorption of C2H4, CO, NO2, and SO2 on Co/N–gra, the molecules may act as donors or acceptors of electrons, which can lead to charge transfer (range from 0.38 to 0.7 e) and eventually change the conductivity of Co/N–gra. The CO adsorbed Co/N3–gra complex exhibits a semiconductor property and the NO2/SO2 adsorption can regulate the magnetic properties of Co/N3–gra. Moreover, the Co/N3–gra system can be applied as a gas sensor of CO and SO2 with high stability. Thus, we assume that our results can pave the way for the further study of gas sensor and spintronic devices. Full article
(This article belongs to the Special Issue Advanced Research in Magnetic Nanoparticles)
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