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10.3390/app14031106
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Article

Magnetic Behaviour of Iron Oxide/Dextran Nanoparticles in a Keratin Matrix

by
Franco Dinelli
1,2,*,†,
Michele Modestino
2,†,
Armando Galluzzi
2,3,
Tamara Posati
4,
Mirko Seri
5,
Roberto Zamboni
4,6,
Giovanna Sotgiu
4,6,
Franco Corticelli
7 and
Massimiliano Polichetti
2,3,*
1
National Institute of Optics (INO), National Research Council, Via Moruzzi 1, 56124 Pisa, Italy
2
Department of Physics, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
3
Institute for Superconductors, Oxides and Other Innovative Materials and Devices(SPIN), National Research Council, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
4
Institute for Organic Synthesis and Photoreactivity (ISOF), National Research Council, Via Gobetti 101, 40129 Bologna, Italy
5
Institute of Nanostructured Materials (ISMN), National Research Council, Via Gobetti 101, 40129 Bologna, Italy
6
Kerline srl, Via Gobetti 101, 40129 Bologna, Italy
7
Institute for Microelectronics and Microsystems (IMM), National Research Council, Via Gobetti 101, 40129 Bologna, Italy
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Appl. Sci. 2024, 14(3), 1106; https://doi.org/10.3390/app14031106
Submission received: 4 December 2023 / Revised: 3 January 2024 / Accepted: 19 January 2024 / Published: 29 January 2024
(This article belongs to the Section Nanotechnology and Applied Nanosciences)
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Development of a method to characterize size distributions of magnetic nanoparticles and their magnetic behavior in polymeric matrices.

Abstract

Magnetic nanoparticles (MNPs) are interesting for their potential employment in biomedical and environmental technologies. Although they have been characterized by many techniques, there are some issues that need to be solved. For instance, it is not yet possible to finely characterize their size distribution or to detect their local magnetic properties. In this work, commercial MNPs were employed, which were made of iron oxide cores with a mean diameter of 8 nm embedded in a matrix of dextran to form skeins with a mean diameter of 20 nm. These MNPs have been dispersed in keratin, a natural protein extracted from wool. Thin films have been realized by spin coating water solutions with various MNP concentrations. Analysis was conducted using a set of techniques, namely Atomic Force Microscopy, Environmental Scanning Electron Microscopy, a Physical Property Measurement System–Vibrating Sample Magnetometer, and the spatially resolved Magneto-Optic Kerr Effect (NanoMOKE). These MNPs show superparamagnetic properties, although a wide distribution of blocking temperature values indicates that the cores are not isolated and interact with others. NanoMOKE not only allows us to map the magnetic behavior of MNP clusters, but also to detect the presence of isolated MNPs dispersed in the keratin matrix.
Keywords: magnetic nanoparticles; iron oxide; magnetic properties; Kerr effect; MOKE; NanoMOKE; PPMS-VSM; thin films; keratin magnetic nanoparticles; iron oxide; magnetic properties; Kerr effect; MOKE; NanoMOKE; PPMS-VSM; thin films; keratin

Share and Cite

MDPI and ACS Style

Dinelli, F.; Modestino, M.; Galluzzi, A.; Posati, T.; Seri, M.; Zamboni, R.; Sotgiu, G.; Corticelli, F.; Polichetti, M. Magnetic Behaviour of Iron Oxide/Dextran Nanoparticles in a Keratin Matrix. Appl. Sci. 2024, 14, 1106. https://doi.org/10.3390/app14031106

AMA Style

Dinelli F, Modestino M, Galluzzi A, Posati T, Seri M, Zamboni R, Sotgiu G, Corticelli F, Polichetti M. Magnetic Behaviour of Iron Oxide/Dextran Nanoparticles in a Keratin Matrix. Applied Sciences. 2024; 14(3):1106. https://doi.org/10.3390/app14031106

Chicago/Turabian Style

Dinelli, Franco, Michele Modestino, Armando Galluzzi, Tamara Posati, Mirko Seri, Roberto Zamboni, Giovanna Sotgiu, Franco Corticelli, and Massimiliano Polichetti. 2024. "Magnetic Behaviour of Iron Oxide/Dextran Nanoparticles in a Keratin Matrix" Applied Sciences 14, no. 3: 1106. https://doi.org/10.3390/app14031106

APA Style

Dinelli, F., Modestino, M., Galluzzi, A., Posati, T., Seri, M., Zamboni, R., Sotgiu, G., Corticelli, F., & Polichetti, M. (2024). Magnetic Behaviour of Iron Oxide/Dextran Nanoparticles in a Keratin Matrix. Applied Sciences, 14(3), 1106. https://doi.org/10.3390/app14031106

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