Journal ArticleDOI
Microemulsion-Assisted Synthesis of Tunable Superparamagnetic Composites
Pedro Tartaj,Carlos J. Serna +1 more
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TLDR
In this article, the thermal annealing of iron oxide/silica composites synthesized using micro-emulsions with a high content of the iron oxide precursor was studied.Abstract:
Tunable superparamagnetic materials have been obtained by the thermal annealing of iron oxide/silica composites synthesized using microemulsions with a high content of the iron oxide precursor. The crystallochemical characteristics of the powders obtained after controlled hydrolysis within the reverse micelle nanocavities and their thermal evolution up to the formation of the γ-Fe2O3 crystalline phase were studied. The thermally annealed composites clearly exhibited superparamagnetic behavior with the value of the saturation magnetization easily tuned by changing the iron oxide content and the annealing temperature. Information on the influence of particle size and interparticle interactions on the magnetic properties of the composites was inferred from zero field and field cooling measurements and also from the decay of the reduced remanence with temperature. It was observed that the blocking temperature increased with content and particle size of γ-Fe2O3. We have also determined a strong dependence of t...read more
Citations
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Magnetic Iron Oxide Nanoparticles: Synthesis, Stabilization, Vectorization, Physicochemical Characterizations, and Biological Applications
Sophie Laurent,Delphine Forge,Marc Port,Alain Roch,Caroline Robic,Luce Vander Elst,Robert N. Muller +6 more
TL;DR: Practical Interests of Magnetic NuclearRelaxation for the Characterization of Superparamagnetic Colloid, and Use of Nanoparticles as Contrast Agents forMRI20825.
Journal ArticleDOI
The preparation of magnetic nanoparticles for applications in biomedicine
Pedro Tartaj,María del Puerto Morales,Sabino Veintemillas-Verdaguer,T. González-Carreño,Carlos J. Serna +4 more
TL;DR: In this article, a review of state-of-the-art synthetic routes for the preparation of magnetic nanoparticles useful for biomedical applications is presented, with a special emphasis on showing the benefits of using nanoparticles.
Journal Article
The preparation of magnetic nanoparticles for applications in biomedicine : Biomedical applications of magnetic nanoparticles
Pedro Tartaj,María del Puerto Morales,Sabino Veintemillas-Verdaguer,T. González-Carreño,Carlos J. Serna +4 more
TL;DR: In this paper, a review of state-of-the-art synthetic routes for the preparation of magnetic nanoparticles useful for biomedical applications is presented, with a special emphasis on showing the benefits of using nanoparticles.
Journal ArticleDOI
Synthesis, properties, and applications of magnetic iron oxide nanoparticles
Amyn S. Teja,Pei Yoong Koh +1 more
TL;DR: In this article, the properties, applications, and syntheses of three magnetic iron oxides (hematite, magnetite, and maghemite) are discussed and methods of preparation that allow control over the size, morphology, surface treatment and magnetic properties of their nanoparticles.
Journal ArticleDOI
Iron oxide nanoparticles: Diagnostic, therapeutic and theranostic applications.
Seyed Mohammadali Dadfar,Karolin Roemhild,Natascha Drude,Saskia von Stillfried,Ruth Knüchel,Fabian Kiessling,Twan Lammers,Twan Lammers,Twan Lammers +8 more
TL;DR: The synthesis, surface functionalization and characterization of iron oxide nanoparticles, as well as their (pre‐) clinical use in diagnostic, therapeutic and theranostic settings, are summarized.
References
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Journal ArticleDOI
Low Temperature Surface Spin-Glass Transition in γ - Fe 2 O 3 Nanoparticles
TL;DR: In this paper, a spin-glass-like transition was found in magnetic nanoparticles, with a very high surface to volume ratio, exhibiting both strong exchange anisotropy and magnetic training effect.
Journal ArticleDOI
Surface and Internal Spin Canting in γ-Fe2O3 Nanoparticles
María del Puerto Morales,Sabino Veintemillas-Verdaguer,M.I. Montero,Carlos J. Serna,Anna Roig,Ll. Casas,Benjamín Martínez,Felip Sandiumenge +7 more
TL;DR: In this article, structural and magnetic properties of isometric nanoparticles ranging from 3 to 14 nm with a narrow particle size distribution have been studied, and it has been shown that there is a strong dependence on the average crystallite size.
Journal ArticleDOI
Reverse microemulsion synthesis of nanostructured complex oxides for catalytic combustion
Andrey J. Zarur,Jackie Y. Ying +1 more
TL;DR: The synthesis method provides a general route to the production of a wide range of thermally stable nanostructured composite materials with large surface-to-volume ratios and an ultrahigh component dispersion that gives rise to synergistic chemical and electronic effects, thus paving the way to the development of catalysts suitable for high-temperature industrial applications.
Journal ArticleDOI
Magnetocaloric effect in superparamagnets
TL;DR: In this article, the magnetocaloric effect for superparamagnetic materials is calculated as a function of temperature, field and cluster size, and a universal curve is calculated from which an optimum cluster moment may be found for maximum entropy change upon application of a given field H at a given temperature T. Quantum effects are shown to be small for temperatures above 10 K and fields less than a few tesla.
Journal ArticleDOI
Processible Nanostructured Materials with Electrical Conductivity and Magnetic Susceptibility: Preparation and Properties of Maghemite/Polyaniline Nanocomposite Films
Ben Zhong Tang,Yanhou Geng,Jacky Wing Yip Lam,Bensheng Li,Xiabin Jing,Xianhong Wang,Fosong Wang,Alexandre Borisovich Pakhomov,Xixiang Zhang +8 more
TL;DR: In this article, a versatile process for the preparation of Maghemite/polyaniline (γ-Fe2O3/PAn) nanocomposite films with macroscopic processibility, electrical conductivity, and magnetic susceptibility is presented.
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