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Applied Sciences
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Synthesis, Characterization, and Applications of Functional Nanoparticles
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Synthesis, Characterization, and Applications of Functional Nanoparticles

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 5302

Special Issue Editor

Prof. Dr. Johann Michael Köhler

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Guest Editor
Institute of Chemistry and Bioengineering, Department of Physical Chemistry and Microreaction Technology, Technische Universität Ilmenau, 98693 Ilmenau, Germany
Interests: microfluidic synthesis of metal nanoparticles; electrical properties of nanoparticles; non-spherical and composite nanoparticles; nanoparticles in sensing and labelling
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue is dedicated to recent progress in the field of functionalized nanoparticles promising new interesting properties, development of new functional materials, new diagnostic tools and new nanodevices. In particular, nanoparticles with special surface functions, special electrical, magnetic and optical properties as well as composed nanoparticles are of interest for new developments in nanotechnology, as well as in understanding physical, chemical and biomolecular interaction at the nanoscale. Reports and reviews on the synthesis of such new nanomaterials, characterization studies and investigations leading to new applications of functional nanoparticles are welcome.

Prof. Dr. Johann Michael Köhler
Guest Editor

Manuscript Submission Information

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Keywords

  • nanoparticles
  • composite nanomaterials
  • surface functionalization
  • nanoparticle assemblies
  • nanotransducers
  • nanosensors

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Published Papers (3 papers)

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Research

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16 pages, 12733 KiB  
Article
Enhanced Magnetic Properties of Co1−xMnxFe2O4 Nanoparticles
by Adam Szatmari, Rareș Bortnic, Roman Atanasov, Lucian Barbu-Tudoran, Fran Nekvapil, Roxana Dudric and Romulus Tetean
Appl. Sci. 2025, 15(1), 290; https://doi.org/10.3390/app15010290 - 31 Dec 2024
Viewed by 509
Abstract
Co1−xMnxFe2O4 nanoparticles (0 ≤ x ≤ 1) have been prepared via the hydrothermal method. The prepared samples were studied using X-ray diffraction measurements (XRD), transmission electron microscopy (TEM), Raman spectroscopy, and magnetic measurements. All studied [...] Read more.
Co1−xMnxFe2O4 nanoparticles (0 ≤ x ≤ 1) have been prepared via the hydrothermal method. The prepared samples were studied using X-ray diffraction measurements (XRD), transmission electron microscopy (TEM), Raman spectroscopy, and magnetic measurements. All studied samples were found to be single phases and to have a cubic Fd-3m structure. The average crystalline sizes are between 7.8 and 15 nm. EDS analysis confirmed the presence of cobalt, manganese, iron, and oxygen in all prepared samples. It was found by Raman spectroscopy that Fe3+ would be placed on octahedral sites while Fe2+ would, in turn, be displaced to tetrahedral sites while Mn ions will be placed on both sites. Both Mn2+ and Mn4+ are present in studied ferrites. The experimental saturation magnetizations for doped samples are much higher when compared with previous reports, reaching values between 3.71 and 6.7 μB/f.u. The doping with Mn in nanocrystalline cobalt ferrite enhanced the magnetic properties due to changes in the cation distribution between the two sublattices. The higher magnetic moments are explained by the presence of Mn4+ ions located preferentially on tetrahedral sites while Mn2+ prefer octahedral sites, and by the high quality and crystallinity of our samples the nanoparticles being almost monodomain. Large values of the coercive field were found at 4.2 K while the hysteresis is almost absent in all investigated samples at room temperature. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Applications of Functional Nanoparticles)
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10 pages, 1500 KiB  
Communication
Inverse-Nanoemulsion-Derived Protein Hydrogels (NanoTrans-Gels) Can Outperform DOSPA/DOPE Lipid-Complex Transfection Agent
by Michael Kohler, Markus Krämer, Bastian Draphoen, Felicitas Schmitt, Mika Lindén, Ann-Kathrin Kissmann, Ulrich Ziener and Frank Rosenau
Appl. Sci. 2024, 14(20), 9151; https://doi.org/10.3390/app14209151 - 10 Oct 2024
Viewed by 1081
Abstract
Transfection of mammalian and human cell lines in medical research both are key technologies in molecular biology and genetic engineering. A vast variety of techniques to facilitate transfection exists including different chemical and nanoparticle-based agents as mediators of nucleic acid uptake, with nanoparticles [...] Read more.
Transfection of mammalian and human cell lines in medical research both are key technologies in molecular biology and genetic engineering. A vast variety of techniques to facilitate transfection exists including different chemical and nanoparticle-based agents as mediators of nucleic acid uptake, with nanoparticles composed of the lipids DOSPA/DOPE belonging to the established type of agents. We show that inverse-nanoemulsion-derived protein nanohydrogels (NanoTrans-gels), prepared by a simple synthesis protocol, are suited to transfect two model cancer cell lines (MCF7 and A549) with high efficiency. The transfection efficiency was analyzed in comparison to the DOSPA/DOPE-dependent protocols as a reference method. Since nanogel-based transfection outperformed the Lipofectamine-dependent technique in our experiments, we believe that the NanoTrans-gels loaded with plasmid DNA may open new avenues for simple and efficient transfection for humans and probably also other mammalian cell lines and may develop into a general tool for standard transfection procedures in cell biology laboratories. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Applications of Functional Nanoparticles)
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Review

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29 pages, 4272 KiB  
Review
Exploring the Potential of Nanoparticles in the Treatment of Breast Cancer: Current Applications and Future Directions
by Puja Patel, Vadanasundari Vedarethinam, Maame A. Korsah, Michael K. Danquah and Jaison Jeevanandam
Appl. Sci. 2024, 14(5), 1809; https://doi.org/10.3390/app14051809 - 22 Feb 2024
Cited by 1 | Viewed by 3159
Abstract
Breast cancer (BC) ranks among the most diagnosed solid tumors worldwide. For decades, significant research efforts have been dedicated to finding selective treatments for these solid tumors. Currently, the primary treatment method for BC involves surgery, with the subsequent utilization of radiotherapy and [...] Read more.
Breast cancer (BC) ranks among the most diagnosed solid tumors worldwide. For decades, significant research efforts have been dedicated to finding selective treatments for these solid tumors. Currently, the primary treatment method for BC involves surgery, with the subsequent utilization of radiotherapy and chemotherapy. However, these subsequent treatments often fall short of effectively treating BC due to their side effects and harm to healthy tissues. Today, a range of nanoparticles are being developed to target BC cells without affecting the surrounding healthy tissues. This in-depth review, based on studies, seeks to shed light on these specially designed nanoparticles and their potential in BC treatment. Typically, therapeutic drugs or naturally occurring bioactive compounds are incorporated into precisely crafted nanoparticles. This enhances their solubility, longevity in the bloodstream, and distribution in the body while also minimizing side effects and immune reactions. Nanoparticles have been designed to address the shortcomings of standalone therapeutics and traverse various biological obstacles spanning the systemic, microenvironmental, and cellular that differ among patients and diseases. We prioritize breakthroughs in nanoparticle design to surpass diverse delivery obstacles and believe that smart nanoparticle engineering not only enhances effectiveness for general delivery but also allows customized solutions for specific needs, ultimately leading to better outcomes for patients. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Applications of Functional Nanoparticles)
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