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Zorai A, Souici A, Adjei D, Dragoe D, Rivière E, Ouhenia S, Mostafavi M, Belloni J. Radiation-Induced Synthesis and Superparamagnetic Properties of Ferrite Fe 3O 4 Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1015. [PMID: 38921891 PMCID: PMC11206415 DOI: 10.3390/nano14121015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/27/2024]
Abstract
Ultra-small magnetic Fe3O4 nanoparticles are successfully synthesized in basic solutions by using the radiolytic method of the partial reduction in FeIII in the presence of poly-acrylate (PA), or by using the coprecipitation method of FeIII and FeII salts in the presence of PA. The optical, structural, and magnetic properties of the nanoparticles were examined using UV-Vis absorption spectroscopy, high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and SQUID magnetization measurements. The HRTEM and XRD analysis confirmed the formation of ultra-small magnetite nanoparticles in a spinel structure, with a smaller size for radiation-induced particles coated by PA (5.2 nm) than for coprecipitated PA-coated nanoparticles (11 nm). From magnetization measurements, it is shown that the nanoparticles are superparamagnetic at room temperature. The magnetization saturation value Ms = 50.1 A m2 kg-1 of radiation-induced nanoparticles at 60 kGy is higher than Ms = 18.2 A m2 kg-1 for coprecipitated nanoparticles. Both values are compared with nanoparticles coated with other stabilizers in the literature.
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Affiliation(s)
- Amel Zorai
- Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences Exactes, Université de Bejaia, Bejaia 06000, Algeria; (A.S.); (S.O.)
- Institut de Chimie Physique, UMR 8000 CNRS, Université Paris-Saclay, Bâtiment 349, 91405 Orsay, France; (D.A.); (M.M.)
- Laboratory for Vascular Translational Science, UMR 1148 INSERM, Université Sorbonne Paris Nord, Université Paris Cité, 93000 Bobigny, France
| | - Abdelhafid Souici
- Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences Exactes, Université de Bejaia, Bejaia 06000, Algeria; (A.S.); (S.O.)
| | - Daniel Adjei
- Institut de Chimie Physique, UMR 8000 CNRS, Université Paris-Saclay, Bâtiment 349, 91405 Orsay, France; (D.A.); (M.M.)
| | - Diana Dragoe
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, UMR 8182 CNRS, Université Paris-Saclay, Bâtiment Henri Moissan, 19 Avenue des Sciences, 91400 Orsay, France; (D.D.); (E.R.)
| | - Eric Rivière
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, UMR 8182 CNRS, Université Paris-Saclay, Bâtiment Henri Moissan, 19 Avenue des Sciences, 91400 Orsay, France; (D.D.); (E.R.)
| | - Salim Ouhenia
- Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences Exactes, Université de Bejaia, Bejaia 06000, Algeria; (A.S.); (S.O.)
| | - Mehran Mostafavi
- Institut de Chimie Physique, UMR 8000 CNRS, Université Paris-Saclay, Bâtiment 349, 91405 Orsay, France; (D.A.); (M.M.)
| | - Jacqueline Belloni
- Institut de Chimie Physique, UMR 8000 CNRS, Université Paris-Saclay, Bâtiment 349, 91405 Orsay, France; (D.A.); (M.M.)
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Dietrich J, Enke A, Wilharm N, Konieczny R, Lotnyk A, Anders A, Mayr SG. Energetic Electron-Assisted Synthesis of Tailored Magnetite (Fe 3O 4) and Maghemite (γ-Fe 2O 3) Nanoparticles: Structure and Magnetic Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:786. [PMID: 36903665 PMCID: PMC10005483 DOI: 10.3390/nano13050786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/10/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Iron oxide nanoparticles with a mean size of approximately 5 nm were synthesized by irradiating micro-emulsions containing iron salts with energetic electrons. The properties of the nanoparticles were investigated using scanning electron microscopy, high-resolution transmission electron microscopy, selective area diffraction and vibrating sample magnetometry. It was found that formation of superparamagnetic nanoparticles begins at a dose of 50 kGy, though these particles show low crystallinity, and a higher portion is amorphous. With increasing doses, an increasing crystallinity and yield could be observed, which is reflected in an increasing saturation magnetization. The blocking temperature and effective anisotropy constant were determined via zero-field cooling and field cooling measurements. The particles tend to form clusters with a size of 34 nm to 73 nm. Magnetite/maghemite nanoparticles could be identified via selective area electron diffraction patterns. Additionally, goethite nanowires could be observed.
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Affiliation(s)
- Johannes Dietrich
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
- Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
| | - Alexius Enke
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
- Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
| | - Nils Wilharm
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
- Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
| | - Robert Konieczny
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
| | - Andriy Lotnyk
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
| | - André Anders
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
- Division of Applied Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
| | - Stefan G. Mayr
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
- Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
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Short Peptide-Based Smart Thixotropic Hydrogels †. Gels 2022; 8:gels8090569. [PMID: 36135280 PMCID: PMC9498505 DOI: 10.3390/gels8090569] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 11/22/2022] Open
Abstract
Thixotropy is a fascinating feature present in many gel systems that has garnered a lot of attention in the medical field in recent decades. When shear stress is applied, the gel transforms into sol and immediately returns to its original state when resting. The thixotropic nature of the hydrogel has inspired scientists to entrap and release enzymes, therapeutics, and other substances inside the human body, where the gel acts as a drug reservoir and can sustainably release therapeutics. Furthermore, thixotropic hydrogels have been widely used in various therapeutic applications, including drug delivery, cornea regeneration and osteogenesis, to name a few. Because of their inherent biocompatibility and structural diversity, peptides are at the forefront of cutting-edge research in this context. This review will discuss the rational design and self-assembly of peptide-based thixotropic hydrogels with some representative examples, followed by their biomedical applications.
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